EPA-650/4-74-002
February 1974
Environmental Monitoring Series
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EPA-650/4-74-002
METEOROLOGICAL EPISODES
OF SLOWEST DILUTION
IN CONTIGUOUS UNITED STATES
by
George C. Holzworth
Meteorology Laboratory
National Environmental Research Center
Research Triangle Park, North Carolina 27711
Program Element 1AA009
National Environmental Research Center
Office of Research and Development
U.S. Environmental Protection Agency
Research Triangle Park, North Carolina 27711
February 1974
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This report has been reviewed by the Office of Research and Development, Environ-
mental Protection Agency, and approved for publication. Approval does not signify
that the contents necessarily reflect the views and policies of the Environmental Pro-
tection Agency, nor does mention of trade names or commercial products constitute
endorsement or recommendation for use.
Publication No. EPA-650/4-74-002
11
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ACKNOWLEDGMENTS
It is a pleasure to acknowledge the vigor and care with which Messers Samuel
McLean, Burley Page, and John Jones, student employees of EPA, attacked the data
searches and compilations involved in this study. I am indebted to Mr. Kenneth
Calder for his helpful suggestions.
NOTE: The author is on assignment with the Environmental Protection Agency
from the National Oceanic and Atmospheric Administration, U.S . Department of
Commerce.
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CONTENTS
Page
ABSTRACT vii
INTRODUCTION 1
ANALYSIS 3
DISCUSSION 5
CONCLUSIONS 11
REFERENCES H
APPENDIX A. RAWINSONDE STATION ABBREVIATIONS A-l
APPENDIX B . DATA FOR EPISODES OF SLOWEST DILUTION B-l
LIST OF TABLES
Table
1 Station Rank in Order of Increasing Values of H x U for Each
Episode Duration of Slowest Dilution 6
2 Number of Station^ Having an Episode of Slowest Dilution with
Specified Limiting Values of Mixing Height and Wind Speed by
Episode Duration; 9
3 Frequency of Occurrence of the Month in which Most of a Period
of Slowest Diluiion Episode Occurred for Stations East and West
of the 95th Meridian, and for all 62 Stations Together 10
LIST OF FIGURES
Figure
1 Station Values of H x U and Isopieths thereof for Slowest Dilution
Episodes Lasting 1 Day 12
2 Station Values of H x U and Isopieths thereof for Slowest Dilution
Episodes Lasting 2 Days 13
3 Station Values of H x U and Isopieths thereof for Slowest Dilution
Episodes Lasting 3 Days 14
4 Station Values of H x U and Isopieths thereof for Slowest Dilution
Episodes Lasting 4 Days 15
5 Station Values of H x U and Isopieths thereof for Slowest Dilution
Episodes Lasting 5 Days
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ABSTRACT
Five years of mixing height and wind speed data have been analyzed to deter-
mine the episodes of slowest dilution lasting 1, 2, 3, 4, and 5 days at each of 62
weather stations in the contiguous United States. Dates and meteorological data are
given for each episode, the stations are ranked by their values on a slowest dilution
parameter, the monthly variation of episodes is summarized, and maps are presented
showing isopleths of slowest dilution values. This information should be of interest
to those involved in modeling and appraising atmospheric transport and diffusion
daring episodes of extremely slow dilution.
Key Words: meteorological episodes, slowest dilution, mixing heights, wind speeds,
limited dilution.
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METEOROLOGICAL EPISODES
OF SLOWEST DILUTION
IN CONTIGUOUS UNITED STATES
INTRODUCTION
Meteorologists are occasionally asked to specify the episodes and conditions of
slowest dilution for atmospheric pollution in particular urban areas . This request
.irises in connection with applications of models of atmospheric transport and diffusion
'.hat are being developed and used to appraise emission control strategies, including
Those for achieving air quality standards. This report pre ,ents data on the slowest
dilution (i.e. , worst stagnation) episodes lasting 1,2,3, >, and 5 days at each of 62
National Weather Service rawinsonde stations located throughout the contiguous United
States . These slowest dilution episodes were selected from uata described in Mixing
Heights, Wind Speeds, and Potential for Urban Air Pollution in_ the Contiguous United
States , and specifically from episodes of limited-dilution . Episodes of limited dilution
were defined as continuous periods of specified minimum duration during which speci-
lied values of daily morning (Mrng) and afternoon (Aftn) mixing height (H) and layer
:-.verage wind speed (U, i.e. , the average speed within the corresponding mixing
layer) were not exceeded and during which significant precipitation did not occur.
Those episodes of more limited dilution were analyzed as described herein to determine
the one occurrence of slowest (or most limited) dilution for each time period at each
station.
The determination of a slowest dilution episode is based largely on the fact that
the product of H x U can be interpreted as a ventilation or dilution factor . Although
It x U is expressed in square meters per second (m2/sec) , it represents the volumetric
rate per unit distance normal to the wind direction (i.e. , m^/sec-m) at which clean
and polluted air within the mixing layer is transported across the upwind and downwind
sides of a city. The smaller the value of H x U, the slower is the rate of dilution of pol-
latants within the urban mixing layer.
Detailed information on H and U data is given in reference 1. For most rawinsonde
stations, the period of record is the 5 years from I960 through 1964.
1Holzworth, G. C. Mixing Heights, Wind Speeds, and Potential for Urban Air Pollution
Throughout the Contiguous United States. Environmental Protection Agency, Research
Triangle Park, N. C. Publication Number AP-101. January 1972 .
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ANALYSIS
An episode of slowest dilution for a designated duration at a station is defined as
a continuous period during which:
1. All values of H and U, respectively, were less than or equal to
HI = 250, 500, 750, 1000, 1500, 2000, or 3000 m
Ui = 2.0, 4.0, 6.0, or 8.0 m/sec
and HI x l}\ was a minimum. Values of HI and Ui for such a minimum are desig-
nated HL and UL •
2. The episode average of individual Mrng and Aftn values of H x U (i.e. , H x U)
was smallest.
3. Significant precipitation did not occur.
The duration of a continuous period was based on the assumption that successive
values of Mrng and Aftn H and U were separated by 12 hours, and no extrapolation was
made beyond the times when item's 1 and 3 above were satisfied. Thus, a continuous
period lasting 1 day means that conditions were satisfied for three consecutive calcula-
tion times (e.g. , Mrng of day 1, to Aftn of day 1, to Mrng of day 2); a period lasting 2
days means conditions were satisfied for five consecutive calculation times; etc.
In regard to item 1, the determination of slowest dilution episodes was greatly
facilitated by the availability, as described in reference 1, of those episodes of specified
minimum duration during which all H ^ HI and all U ^ Uj. Thus, to fully satisfy item 1,
it was only necessary to determine those episodes for which H, x U, was a minimum.
For each station and each specified duration, such episodes are designated as having
limiting values HL and UL • Since certain combinations of the Hj and U} values specified
in item 1 have equal products, a minimum could occur with different but equivalent sets
of limits HL and UL • In such cases all episodes with equivalent limits were evaluated
to find the one with the smallest value of H x U (i.e. , item 2) .
It is important to recognize the role of item 1 in the definition of a slowest dilution
episode. Without it the definition would be straightforward: item 3, no precipitation,
and item 2, the smallest value of H x U. Such a smallest value of H x U could be based
on one or more relatively large values of H x U, which would indicate breaks or
'breathing spells" in the continuity of episode conditions. Item 1 eliminates such breath-
ing spells in terms of the values specified for HL and UL .
In regard to item 2, in calculating individual values of H x U, reports of U = 0.0
m/sec were arbitrarily treated as U = 0.1 m/sec.
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The analysis •was restricted tc periods without significant precipitation because
of its likely cleansing effect, enhanced dilution duriug precipitation, and the difficulty,
as discussed in reference 1, of calculating mixing heights that would be appropriate
during precipitation conditions. Precipitation in connection •with Mrng data was defined
as significant if two or more reports of light precipitation or one or more of moderate
or heavy precipitation occurred in the regular hourly weather observations from 2200
through 0900 Local Standard Time (LST); and similarly for Aftn data, considering hourly
weather observation from 1000 through 2100 LST .
For each station, Appendix B lists the data already mentioned, the dates of the
slowest dilution episode (Dates) for each specified duration, the period of meteorological
record that was examined (Record), and the number of episodes (No.) that occurred
with the indicated limits and equivalent limits on H and U (i.e. , ML and U^) . In cases
of equivalent limits, the values of HL and UL that pertain to a particular episode of
slowest dilution can be easily determined from the values of H and U that are listed in
Appendix B for that episode.
Irlolzworth, G. C. Mixing Heights, Wind Speeds, and Potential for Urban Air Pollution
Throughout the Contiguous United State.-, Environmental Protection Agency, Research
Triangle Park, N . C. Publication Number AP-101. January 1972.
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DISCUSSION
In Table 1 the stations are ranked in order of increasing values of H x U by episode
duration. It is interesting to note that for all five episode durations that are considered.
Lander, Wyoming (LND) ranks first. As can be seen in Appendix B, all of the slowest
dilution episodes of shorter duration at LND occur during the 5-day episode. Similarly
in Table 1, all except one of the episode durations of slowest dilution that rank second
occur at Medford, Oregon (MFR); episode durations that rank third occur twice at both
Winnemucca, Nevada and Rapid City, South Dakota (RAP) , and once at MFR. At higher
rankings, the occurrences tend to become more variable among the stations.
Slowest dilution episodes lasting longer than 5 days are of particular interest for
the higher ranked stations in Table 1. For LND, the station that ranked first for 5-day
durations (see Table 1) , the limits of HL - 250 m and U^ = 2.0 m/sec that are indicated
for this episode (see Appendix B) actually were satisfied for 6 days, from Mrng/12/9/60
through Mrng/12/15/60. For RAP, the station that ranked second for 5-day durations,
the limits of H^ = 250 m and UL = 4.0 m/sec lasted only the 5 days listed in Appendix B .
And for MFR, which ranked third for 5-day durations, the limits of HL = 500 m and U^ =
2.0 m/sec lasted 7 1/2 days, from Mrng/11/28/63 through Aftn/12/5/63. For each station
the dates of all periods lasting 2 days or longer with no significant precipitation (as
defined) and with the following values of Hj and Uj:
Layer wind
speed (Up ,
m/sec
2.0
4.0
6.0
500
X
X
X
Mixing height (H, ), m
1000
X
X
1500
X
X
are available from the Meteorology Laboratory, EPA, Research Triangle Park, N.C.
The data of Table 1 can be readily used to compare the rankings of slowest dilution
episodes among specific stations. For example, considering episodes lasting from 1
through 5 days, New York City (JFK) rankings range between 38th and 45th; whereas
Santa Monica (Los Angeles) , California (SMO) rankings range between 9th and 25th. The
average ranking for each station could be used for comparative purposes, as could the
sum of H x U values for all five episodes; the sum for JFK is 4212.8 m^/sec and for SMO
it is 1711.1 m/sec. Table 1 also gives the mean and standard deviation values of H x U
by episode durations for all stations. The means exceed the corresponding medians by
considerable amounts, and the frequency distributions tail off far to the right (i.e. ,
toward larger values of H x U) .
Since this report is limited to data for specific weather stations, some discussion
of the applicability of the data to neighboring locations is in order. Figures 1 through
5 present maps of H x U values for episodes lasting 1 through 5 days, respectively.
These isopleth analyses are offered as guidance and are not intended to preempt other
interpretations. The figures show that for the most part the patterns are reasonable and
consistent, although there are some irregularities, as might be expected in dealing with
extremes. In general, relatively small values of H x U occur over much of the western
part of the country. However, Great Falls, Montana, becomes somewhat exceptional for
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Table 1. STATION RANK IN ORDER OF INCREASING VALUES OF
u, t /sec,
FOR EACH EPISODE DURATION OF SLOWEST DILUTION'
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Duration
1-Day
Station
LND
MFR
WMC
BNA
RAP
GJT
SLE
LBF
SLC
DEN
GGW
LAS
PIA
SMO
ALB
SAN
GTF
OAK
BOI
CBI
DIAb
BIS
HTSb
PIT
GRB
LIT
INWb
STC
DDC
SHV
JANb
FNT
BRJ
H x U
13.6
34.0
34.8
50.7
54.2
79.2
88.6
97.7
99.9
102.5
104.7
107.8
125.4
126.3
128.0
128.5
137.2
138.4
142.4
144.2
149.2
153.0
154.8
156.0
160.6
163.9
173.5
177.1
193.5
194.9
199.1
199.8
201.1
2-Day
Station
LND
MFR
WMC
RAP
GGW
DEN
GJT
LBF
LAS
GEG
SMO
SAN
OAK
SEAb
BOI
INWb
BIS
SLC
HTSb
SLE
ALB
PIT
BRJ
GTF
ELY
GRB
DDC
PIA
FNT
HAT
PWM
ACK
ELP
H x U
16.6
45.6
46.5
78.9
99.4
126.6
159.7
168.4
168.9
178.6
184.7
204.6
205.5
206.1
212.0
228.0
234.5
236.3
258.4
267.2
269.7
275.2
276.9
299.0
319.8
344.5
348.1
350.9
368,3
370.0
379.4
381.5
385.8
3-Day
Station
LND
MFR
RAP
LBF
GGW
WMC
BOI
GJT
BIS
LAS
DDC
INWb
SLC
ALB
SLE
SMO
BRJ
OAK
PIT
ELY
PIA
SAN
SEAb
DIAb
HTSb
BUFb
GRB
DEN
CAR
GTF
FNT
GEG
AMA
H x U
34.4
61.3
93.6
175.4
187.3
205.2
212.4
219.2
250.7
264.5
297.1
307.8
322.1
324.3
332.1
336.6
366.6
370.9
371.2
378.6
382.5
386.3
387.3
390.1
393.7
402.3
407.4
409.8
426.6
437.9
447.5
448.9
499.3
4 -Day
Station
LND
MFR
RAP
LBF
GJT
WMC
GGW
LAS
SMO
INWb
BOI
SLC
ALB
SLE
BRJ
DDC
DEN
GEG
ELY
OAK
BUFb
BIS
PIT
SAN
SEAb
HTSb
AMA
FNT
PIA
ACK
CAR
DAY
ABQ
H x U
57.4
107.1
140.3
198.8
198.8
231.7
232.3
239.8
307.7
327.7
335.6
357.2
357.7
385.1
404.5
414.8
5 -Day
Station
LND
RAP
MFR
GGW
WMC
GJT
LAS
SLE
301
DEN
LBF
INWb
ALB
ELY
GEG
SLC
423.2 OAK
426.2 DDC
430.7 SEAb
433.5
468.6
476.8
478.2
494.7
505.1
547.9
568.4
635.7
666.8
671.0
725.5
767.7
786.9
BUFb
PIA
FNT
ACK
BIS
SMO
PIT
DAY
TUS
ELP
PWM
ABQ
SAN
AHN
H x U
55.1
138.6
142.4
260.1
269.3
270.5
281.6
317.0
355.5
368.5
418.0
422.8
432.8
436.8
443.2
463.5
510.5
561.4
591.0
650.9
674.9
682.9
715.1
736.9
755.8
759.4
761.6
765.6
800.5
812.8
824.2
905.2
976.3
a Station names are abbreviated as in Appendi
b Indicates that the period of record is less
x A.
than 5 years, (See Appendix B.)
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Table 1 (continued). STATION RANK IN ORDER OF INCREASING VALUES OF H x U,
m2/sec, FOR EPISODE DURATION OF SLOWEST DILUTION3
"1 Duration
Rank
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
1-Da
Station
GEG
BRO
CAR
ACK
ELY
INL
BUFb
ELP
HAT
SEA5
SSM
JFK
AMA
PWM
OKC
GSO
LCH
ABO
MAF
MGM
JAX
AHN
TPA
TUS
DAY
CHS
SAT
TOP
MIA
y
H x U
204.6
222.7
246.4
254.2
287.0
298.8
305.5
306.0
316.1
318.7
324.8
332.8
352.5
387.2
388.9
410.8
412.8
421.3
441.1
453.5
462.5
471.3
483.8
488.5
564.0
586.2
749.7
792.8
809.2
2-Da
Station
BUFb
DIAb
SSM
CAR
MGM
AMA
OKC
AHN
TUS
CHS
JFK
STC
ABQ
BNA
DAY
JANb
INL
CBI
TOP
GSO
SAT
LIT
LCHb
MAF
SHV
BRO
MIA
TPA
JAX
y
""H x U
393.1
395.1
437.7
441.2
442.8
443.4
469.8
480.1
485.7
504.6
538.3
554.8
563.2
596.6
618.2
699.4
752.3
760.2
766.1
770.1
895.3
914.3
948.2
1017.8
1156.5
1272.0
1325.3
1435.8
1531.9
3-Da
Station
HAT
PWM
ABQ
STC
AHN
LIT
ACK
DAY
ELP
JFK
INL
GSO
BNA
CHS
JANb
CBI
SHV
MGM
TOP
TUS
LCHb
TPA
MIA
SAT
MAF
JAX
SSM
BRO
OKC
y
H x U
503.2
508.2
600.7
674.8
676.2
685.2
754.9
766.1
772.3
772.5
783.3
855.4
920.9
993.8
1063.7
1095.7
1108.9
1136.3
1145.8
1175.8
1248.5
1259.4
1312.3
1351.2
1375.4
1631.3
1696.2
1761.1
2060.8
4-Da
Station
STC
PWM
ELP
HAT
AHN
GRB
CBI
CHS
TUS
MGM
JFK
TOP
GTF
DIAb
LCHb
INL
LIT
BNA
JANb
SHV
SSM
JAX
GSO
MIA
TPA
MAF
BRO
OKC
SAT
y
H x U^
801.4
802.3
833.7
910.5
1019.1
1083.3
1151.0
1181.1
1182.7
1255.6
1288.1
1376.2
1427.0
1452.1
1456.8
1503.9
1559.7
1572.7
1631.1
1633.9
1638.0
1705.1
1721.1
2128.8
2270.1
2308.0
2442.3
2685.3
2803.2
5-Da
Station
GRB
STC
LIT
CBI
JFK
CHS
MGM
SAT
BNA
BRJ
HAT
TPA
HTSb
INL
DIAb
LCHb
GTF
JAX
SSM
JANb
MAF
GSO
MIA
SHV
TOP
OKC
BRO
AMA
CAR
y
H x U
1030.9
1107.6
1115.6
1177.9
1281.1
1315.2
1453.5
1506.0
1529.7
1530.5
1540.5
1580.9
1600.9
1601.8
1685.2
1721.5
1746.6
1800.7
1811.6
1837.6
1952.3
1986.2
2194.8
2272.6
2574.5
2723.7
2802.9
2958.5
3260.2
Mean
263.03
Standard
deviation 185.43
472.67
350.99
664.85
464.98
945.60
690.63
1133.30
776.11
a Station names are abbreviated as in Appendix A.
b Indicates the period of record is less than 5 years.
(See Appendix B.',
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episode durations of 4 and 5 days. Large values of H x U are centered in the general
vicinity of Texas for all episode durations, but lobes extend out in various directions for
different durations. Large values of H x U are also common over Florida. Small values
generally occur over much of the Appalachian Mountains, especially over the northern
part, although for longer durations the areas of small values tend to become oriented
east-west along the southern Great Lakes and eastward to the Atlantic Ocean. Values for
Dayton, Ohio; Topeka, Kansas; and San Antonio, Texas, tend to force the isopleth
analyses for 1-day episodes, but otherwise fit the patterns fairly well.
Numerous other comments may be made in regard to Figures 1 through 5, but the
data speak largely for themselves. Although extensions of the data to nearby locations
seem to be warranted, they should not be made without careful consideration. In this
regard, reference to the synoptic weather situation could be particularly helpful, as
could knowledge of such mesoscale phenomena'as lake and sea breezes. While many
of the rawinsonde stations in this report are located in mountainous regions, none are
situated on mountain peaks or ridges, although the stations for Huntington, W.Va,
and Pittsburgh, Pa. ,are on hills roughly 100 meters above the cities. This distinction
is important because atmospheric dilution is generally accepted as being significantly
better (i.e. , faster) on mountain peaks and ridges than in adjacent valleys. Thus,
data presented in this report for mountainous regions are most representative of the
valleys.
Table 2 shows, by episode duration, the number of stations having an episode of
slowest dilution with specified values of HL and UL • For 1-day durations, 50 of the 62
possibilities of slowest dilution occurred with HL = 500 m, UL = 4.0 m/sec. For longer
durations, there is a general shift to less restrictive limits, but even for 5-day dura-
tions there are still 14 stations with HL = 500 m, UL = 4.0 m/sec. The least restrictive
limits for 1-day durations are HL = 1500 m, UL = 2.0 m/sec; whereas for 5-day dura-
tions, they are HL = 2000 m, UL = 8.0 m/sec.
Table 3 summarizes the monthly occurrence of slowest dilution episodes. For most
durations and considering all 62 stations together, the slowest dilution episodes were
always most frequent in December, which was usually followed in order by January,
November, February, and October. There were no occurrences in April or June, and
relatively few in the other 5 months. From a broad geographical consideration, there
were only slight differences. For 1- through 3-day durations, the 3 months with most
episodes of slowest dilution in the East were November, December , and January; in the
West they were December, January, and February. For 4- and 5-day episodes, the 3
months with most episodes of slowest dilution in both the East and the West were Novem-
ber, December, and January.
It is worth mentioning that inspection of synoptic weather maps reveals that many
of the episodes of slowest dilution were associated with slow-moving, warm-type anti-
cyclones. Since such weather systems usually cover large areas, it is not too surpris-
ing to find overlapping of some episodes at adjacent stations. The November-December
air pollution episode of 1962 in the eastern United States^ is an outstanding example of
rather simultaneous and widespread atmospheric stagnation associated with a warm
anticyclone. Eleven stations included in this report had slowest dilution episodes that
occurred in association with that pollution episode. The stations were New York, Albany,
and Buffalo, New York; Portland and Caribou, Maine; Flint, Green Bay, and Sault Ste.
Marie, Michigan; Huntington, West Virginia; Pittsburgh, Pennsylvania; and Washington,
District of Columbia.
2Lynn, D. A., B. J. Steigerwald, and J. H. Ludwig . The November-December 1962
Air Pollution Episode in the Eastern United States . U.S. Department of Health.Educa-
tion,and Welfare, Public Health Service, Cincinnati, Ohio. Publication Number 999-AP-
7. September 1964.
-------
It should be recognized tha: the episodes of slowest dilution det jed in this
report are most appropriate to the general pollution problem of large •, n complexes.
Such episodes are riot necessarily the ones that would result in the mc> ndesirable
transport and diffusion of pollutants emitted from the tall chimney of a j,}e source,
for example.
Table 2. NUMBER OF STATIONS HAVING AN EPISODE OF SLOWEST DILUTION
WITH SPECIFIED LIMITING VALUES OF MIXING HEIGHT (H,_)
AND WIND SPEED (U ) BY EHSODE DURATION3
Layer wind
speed, m/sec
1-Day duration
2.0
4.0
6.0
8.0
2-Day duration
2.0
4.0
6.0
8.0
3-Day duration
2.0
4.0
6.0
8.0
4-Day duration
2.0
4.0
6.0
8.0
5-Day duration
2.0
4.0
6.0
8.0
Mixing height, m
250
18
21
9
2
15
8
1
1
8
2
3
1
4
1
2
1
1
1
500
8
3
6
13
8
3
8
11
1
1
g
6
5
1
n
5
6
750
1
4
2
2
7
1
1
2
4
2
3
4
4
1
1000
1500
1 1
1
1
6
2
1
8
4
3
2
4
4
5
2
3
3
4
5
2000
3000
1
1
3
2
aThe total number of stations is 62.
-------
Table 3. FREQUENCY OF OCCURRENCE OF THE MONTH IN WHICH MOST OF A PERIOD
OF SLOWEST DILUTION EPISODE OCCURRED FOR STATIONS EAST (E) AND WEST (W)
OF THE 95TH MERIDIAN, AND FOR ALL (A) 62 STATIONS TOGETHER
Month
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Duration
1-Day
E
4
3
2
0
0
0
2
0
0
4
8
8
W
12
5
1
0
1
0
0
0
0
0
1
11
A
16
8
3
0
1
0
2
0
0
4
9
19
2-Day
E
9
4
1
0
0
0
0
0
1
1
5
10
W
11
3
2
0
0
0
0
0
0
0
2
13
A
20
7
3
0
0
0
0
0
1
1
7
23
3-Day
E
6
1
0
0
0
0
0
0
0
2
10
12
W
9
2
2
0
0
0
0
0
1
0
2
15
A
15
3
2
0
0
0
0
0
1
2
12
27
4-Day
E W
5
3
0
0
0
0
0
0
0
4
9
10
9
3
1
0
0
0
0
0
0
1
6
11
A
14
6
1
0
0
0
0
0
0
5
15
21
5-Day
E
8
0
1
0
2
0
0
0
1
5
5
9
W
11
1
0
0
0
0
2
1
1
0
3
12
A
19
1
1
0
2
0
2
1
2
5
8
21
10
-------
CONCLUSIONS
The parameters and criteria used in this report to define episodes of slowest dilu-
tion appear to give reasonable results for the contiguous United States. The dates of
these episodes should be of considerable interest to those involved in modeling and
evaluating such situations. For those who may wish to apply the data further, individ-
ual values of mixing height and average wind speed are listed for each episode. But
this is not meant to imply that other dilution parameters may not be appropriate in such
applications. On the contrary, the use of additional and/or more detailed information
is encouraged. Some basic data for the period 1960 through 1964 are readily available
from the National Climatic Center, Asheville, North Carolina 28801. Hourly weather
observations were published in Local Climatological Data Supplements, and daily
summaries thereof were published in Local Climatological Data. These data are available
monthly for selected stations. Individual rawinsonde reports of vertical temperature
and wind profiles through 1963 were published in Daily Series, Synoptic Weather Maps,
Part II, Northern Hemisphere Data Tabulations. Rawinsonde data beginning in 1964 are
available on microfilm and microfiche.
REFERENCES
Holzworth, G.C. Mixing Heights, Wind Speeds, and Potential for
Urban Air Pollution Throughout the Contiguous United States.
Environmental Protection Agency, Research Triangle Park, N.C.
Publication Number AP-101. January 1972.
Lynn, D.A., B.J. Steigerwald, and J.H. Ludwig. The Novem-
ber-December 1962 Air Pollution Episode in the Eastern United
States. U.S. Department of Health, Education, and Welfare,
Public Health Service, Cincinnati, Ohio. Publication Number
999-AP-7. September 1964.
11
-------
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-------
APPENDIX A.
RAWINSONDE STATION ABBREVIATIONS
ALB Albany, New York
ABQ Albuquerque, New Mexico
AMA Amarillo, Texas
AHN Athens, Georgia
BIS Bismarck, North Dakota
BOI Boise, Idaho
BRO Brownsville, Texas
BUF Buffalo, New York
BRJ Burwood, Louisiana
HAT Cape Hatteras, North Carolina
CAR Caribou, Maine
CHS Charleston, South Carolina
CBI Columbia, Missouri
DAY Dayton, Ohio
DEN Denver, Colorado
DDC Dodge City, Kansas
ELP El Paso, Texas
ELY Ely, Nevada
FNT Flint, Michigan
GGW Glasgow, Montana
GJT Grand Junction , Colorado
GTF Great Falls, Montana
GRB Green Bay, Wisconsin
GSO Greensboro, North Carolina
HTS Huntington, West Virginia
INL International Falls, Minnesota
JAN Jackson, Mississippi
JAX Jacksonville, Florida
LCH Lake Charles, Louisiana
LND Lander, Wyoming
LAS Las Vegas, Nevada
LIT Little Rock, Arkansas
MFR Medford, Oregon
MIA Miami, Florida
MAP Midland, Texas
MGM Montgomery, Alabama
ACK Nantucket, Massachusetts
BNA Nashville, Tennessee
JFK New York, New York
LBF North Platte, Nebraska
OAK Oakland, California
OKC Oklahoma City, Oklahoma
PIA Peoria, Illinois
PIT Pittsburgh, Pennsylvania
PWM Portland, Maine
RAP Rapid City, South Dakota
STC St. Cloud, Minnesota
SLE Salem, Oregon
SLC Salt Lake City, Utah
SAT San Antonio, Texas
SAN San Diego, California
SMO Santa Monica, California
SSM SaultSte. Marie, Michigan
SEA Seattle, Washington
SHV Shreveport, Louisiana
GEG Spokane, Washington
TPA Tampa, Florida
TOP Topeka, Kansas
TUS Tucson, Arizona
DIA Washington, D.C.
WMC Winnemucca, Nevada
INW Winslow, Arizona
A-l
-------
-------
APPENDIX B.
DATA FOR EPISODES OF SLOWEST DILUTION
B-l
-------
ALBANY, NEW YORK (ALB) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
01/17/?3
17
13
11 728/62
28
29
2"1
30
1 1/28/62
2£
29
29
30
30
12/01/62
11/28/6?
28
29
29
30
30
12/01/62
01
02
11/28/62
28
29
29
30
30
12/01/62
01
02
02
03
H
(m)
63
299
141
Average
76
'37
90
353
qn
Average
76
3,87
90
353
89
338
94
Average
76
437
90
353
R9
338
94
393
86
Average
76
487
90
353
89
338
94
393
86
397
157
Average
U
(m/sec)
r\ o
i!o
0.2
(i.e., H x U):
0.0
1.7
0'.5
1.3
0.0
(i.e., HTTJ):
0.0
1.7
0.5
1.3
0.0
2.7
0.0
(i.e., H x U):
0.0
1.7
0.5
1.3
0.0
2.7
0.0
2.0
1.9
(i.e., H x U):
0.0
1.7
0.5
1.3
0.0
2.7
0.0
2.0
1.9
2.3
4.0
(i.e., H x U):
H x U
(m2/sec)
56.7
299.0
28.2
*
128.0
7.6
827."
45.0
450.9
8.9
263. 7
7.6
827.9
45.0
458.9
8.9
912.6
9.4
324.3
7.6
827.9
45.0
458.9
8.9
912.6
9.4
786.0
163.4
357.7
7.6
827.9
45.0
458.9
8.9
912.6
9.4
78fi.O
163.4
913.1
628.0
432.8
Limits
HL UL No.
500 2.0 6
500 2.0 1
500 4.0 1
500 4.0 1
500 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episode.
No. = Total number of episodes with these Limits.
B-2
-------
ALBUQUERQUE, NEW MEXICO (ABQ) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days :
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/24/60
24
25
12/13/62
13
14
14
15
12/12/62
12
13
13
14
14
15
12/11/62
n
12
12
13
13
14
14
15
12/10/62
10
11
n
12
12
13
13
14
14
15
H
(m)
182
496
142
Average
61
812
56
794
40
Average
44
760
61
812
56
794
40
Average
190
923
44
760
61
'812
56
794
40
Average
97
856
190
923
44
760
61
812
56
794
40
Average
U
(m/sec)
2.0
1.7
0.4
(i.e., H x U):
1.2
2.0
0.4
1.3
1.6
(i.e., H~TTj):
2.2
1.7
1.2
2.0
0.4
1.3
1.6
(i.e., H x U):
3.0
2.5
2.2
•\'.7
1.2
2.0
0.4
1.3
r.6
(i.e., iTTU):
2.8
2.0
3.0
2.5
2.2
1.7
1.2
2.0
0.4
1.3
1.6
(i.e., H x U):
H x U
(m2/sec)
364.0
843.2
56.8
421.3
73.2
1624.0
22.4
1032.2
64.0
563.2
96.8
1292.0
73.2
1624.0
22.4
1032.2
64.0
600.7
570.0
2307.5
96.8
1292.0
73.2
1624.0
22.4
1032.2
64.0
786.9
271.6
1712.0
570.0
2307.5
96.8
1292.0
73.2
1624.0
22.4
1032.2
64.9
824.2
Limits
HL UL No.
500 2.0 1
1000 2.0 1
1000 4.0 8
1000 4.0 2
1000 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of 11 and I! used to define episodes.
No. = Total number of episodes with these Limits.
B-3
-------
AMARILLO, TEXAS (AMA) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
ilrnc
Aftn
Krng
Aftn
Mrng
Aftn
Mrna
Aftn
Mrna
Aftn
Mr no
Aftn
Mr nr
Aftn
Mrna
Mr:-g
Aftn
Mr no,
Aftn
Hrng
Aftn
Mrng
Aftn
flrno
Mrng
Aftn
Mrno
Aftn
Hrng
Aftn
i'lrnq
Aftn
Mrng
Aftn
Mrng_
Date
Mo/Da/Yr
01/07/60
07
08
02/08/64
09
09
10
10
01/07/69
07
08
08
09
09
10
01/07/60
07
08
03
09
09
10
V)
11
01/13/63
13
14
14
15
15
15
16
17
17
18
H
(m)
36.
217
47
Average
191
54
160
59
73
Average
36
217
HI
164
81
105
107
Average
36
217
47
164
JB1
105
107
186'
65
Average
115
1863
78
622
54
1301
71
483
52
1221
70
Average
U
(m/sec)
4.1
3.5
3.?
(i.e., H x
4.5
5.0
3.5
5.5
2.6
(i.e., ITT
4.1
3.5
•5 "*>
**> * 1—
4.5
7.1
4.8
5.R
(i.e., H x
4.1
3.5
3.2
A. 5
7,1
4.8
5.8
7.1.
4.9
(i.e. , HT
6.1
6.4
3.6
6.7
5.0
2.8
E.7
5.7
4.1
6.5
3.3
(i.e., H~x~
H x U
(m2/sec) /
147.6
759.5
150.4
U): 352.5
853.5
270.0
560.0
324.5
202.8
U): 44 3. *
147.6
759.5
ISO. 4
738.1
575.1
504.0
620.6
U): 49D.3
147.6
759.5
150.4
738.0
575.1
504.0
620.6
1332.1
313.5
U): 568.4
711.5
11923.2
280 . 8
4167.4
270.0
3642.8
^04.7
2753.1
213.2
7056.0
231.0
TJ): 2%S.5
Limits
HL UL No.
250 6.0 4
250 6.0 1
250 8.0 1
250 8.0 1
2DOO 8.0 1
H = Mixing height.
U = Uind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits ~ Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-4
-------
ATHENS, GEORGIA (AHN) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/29/64
29
30
12/26/62
26
27
27
28
12/31/62
31
01/01/63
01
02
02
03
12/03/60
03
04
04
05
05
06
06
07
01/01/63
01
02
02
03
03
04
04
05
05
06
H
(m)
169
169
160
Average
170
333
140
407
94
Average
192
888
100
700
49
633
72
Average
49
778
32
753
48
662
45
832
89
Average
100
700
49
633
72
1310
44
969
219
888
81
Average
U
(m/sec)
3.0
3.0
2.5
(i.e., H x U):
1.4
2.7
1.8
1.7
3.4
(i.e., H x U):
3.5
3.5
2.9
0.3
2.0
0.3
2.3
(i.e., H x U):
1.8
3.8
3.2
3.2
2.4
1.7
1.4
2.5
2.6
(i.e., H x U):
2.9
0.3
2.0
0.3
2.3
3.2
3.9
2.8
4.0
2.0
0.7
(i.e., H x U):
H x U
(m2/sec)
507.0
507.0
400.0
471.3
238.0
899.1
252.0
691.9
319.6
480.1
672.0
3108.0
290.0
210.0
98.0
189.9
165.6
676.2
88.2
2956.4
102.4
2409.6
115.2
1125.4
63.0
2080.0
231.4
1019.1
290.0
210.0
98.0
189.9
165.6
4192.0
171.6
2713.2
876.0
1776.0
56.7
976.3
Limits
HL UL No.
250 4.0 1
500 4.0 1
1000 4.0 4
1000 4.0 1
1500 4.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episode^.
No. = Total number of episodes with these Limits.
B-5
-------
BISMARCK, NORTH DAKOTA (BIS) JANUARY 1. 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
flrnc
Aftn
Mrng
Mrng
Aftn
Mrna
Aftn
Mrng
Mr no
Aftn
Krng
Aftn
Mr no
Aftn
. Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrno
Aftn
Mrng
Aftn
Flrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
11/08/63
08
09
02/09/61
09
10
10
11
12/08/64
08
09
09
10
10
11
02/07/61
08
08
09
09
10
10
11
11-
01/29/64
29
30
30
31
31
02/01/64
01
02
02
03
H
(m)
49
217
65
Average
27
99
11
160
104
Average
59
153
46
193
38
85
50
Average
180
65
252
27
99
11
160
104
206
Average
56
460
33
217
67
321
18
250
42
322
43
•Average
U
(m/sec)
1.4
1.5
1.0
(i.e., H x U):
0.0
1.9
2.7
4.0
3.0
(i.e., H x U):
3.0
2.1
0.0
4.5
i . 0
2.3
3.3
(i.e., H x U):
6.0
2.7
5,0
0.0
1.9
2.7
6.0
3,0
2.0
(i.e., H~TU):
3.4
6.0
2.1
5.E
4.0
5.7
0.9
3.5
0.0
2.7
0.7
(i.e., H x U):
H x U
(m2/sec)
68.6
325.5
65.0
153.0
2.7
188.1
220.5
640.0
312.0
234.3
177.0
306. T
4.6
SSC. 5
3fi.il
195.5
165.0
250.7
1080.0
175.5
1260.0
2.7
188.1
220.5
640.0
312.0
412.0
476.8
190.4
2760.0
69.3
1193.5
268.0
1829.7
16.2
875.0
4.2
869.4
30.1
736.9
Limits
HL UL NO.
250 2.0 2
250 4.0 3
250 6.0 1
500 6.0 2
500 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of 1! and U used to define episodes.
No. = Total number of episodes with these Limits.
B-6
-------
BOISE, IDAHO (BOI) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Oays:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Aftn
Mrng
Aftn
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
01/22/61
22
23
01/21/61
21
22
22
23
12/16/63
17
17
18
18
19
19
01/27/62
28
28
29
29
30
30
31
31
01/26/62
27
27
28
28
29
29
30
30
31
31
H
(m)
90.
229
206
Average
144
417
90
229
206
Average
151
113
307
145
162
289
164
Average
209
123
212
84
56
290
233
402
337
Average
268
118
209
123
212
84
56
290
233
402
337
Average
U
(m/sec)
0.7
1.5
0.0
(i.e., THTU):
1.5
1.0
0.7
1.5
0.0
(i.e., H~x~U):
1.0
1.6
1.7
0.8
2.0
0.0
1.0
(i.e., TTxU):
2.0
2.2
2.0
2.0
2.5
1.5
2.0
0.9
1.0
(i.e., PTTIJ):
2.0
3.0
2.0
2.2
2.0
2.0
2.5
1.5
2.0
0.9
1.0
(i.e., H x U):
H x U
(m2/sec)
63.0
343.5
20.6
142.4
216.0
417.0
63.0
343.5
20.6
212.0
151.0
180.8
521.9
116.0
324.0
28.9
164.0
212.4
418.0
270.6
424.0
168.0
140.0
435.0
466.0
361.8
337.0
335.6
536.0
354.0
418.0
270.6
424.0
168.0
140.0
435.0
466.0
361.8
337.0
355.5
Limits
HL UL No.
250 2.0 4
500 2.0 2
250 4.0 6
500 2.0 1
500 4.0 6
500 4.0 3
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episor^s with these Limits.
B-7
-------
BROWNSVILLE, TEXAS (BRO) JANUARY 1, I960—DECEMBER 31,1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrnq
Aftn
Mrng
Mrnq
Aftn
Mrno
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
01/27/60
27
28
12/23/60
23
24
24
25
12/15/62
15
16
16
17
17
18
11/18/60
19
19
20
20
21
21
22
22
12/21/60
22
22
23
23
24
24
25
25
26
26
H
(m)
75
152
114
Average
221
176
349
285
418
Average
193
723
87
706
109
842
43
Average
153
453
739
496
1451
795
619
5Q2
912
Average
843
71
1450
221
176
349
285
418
1082
104
1326
Average
U
(m/sec)
0.8
2.5
2.0
(i.e., H x U):
3.2
5.0
6.0
5.0
•3.0
(i.e., H x U):
1.4
6.5
0.0
4.9
2.3
4.3
0.6
(i.e., H x U):
3.5
2.1
4.5
4.0
3.4
3.0
4.8
4.3
3/0
(i.e., H"TU):
4.5
2.4
4.0
3.2
5.0
6.0
5.0
3.0
5.4
1.1
6.6
(i.e., H x U):
H x U
(m2/sec)
60.0
380.0
228.0
222.7
707.2
880.0
2094.0
1425.0
1254.0
1272.0
270.2
4699.5
8.7
3459.4
250.7
3620.6
25.8
1762.1
535.5
951.3
3325.5
1984.0
4933.4
2385.0
2971.2
2]58.6
2736.0
2442.3
3793.5
170.4
5800.0
707.2
880.0
2094.0
1425.0
1254.0
5842.8
114.4
8751.6
2802.9
Limits
HL UL No.
250 4.0 1
500 6.0 1
1000 8.0 1
1500 6.0 3
2000 6.0 2
1500 8.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episor^s with these Limits.
B-8
-------
BUFFALO, NEW YORK (BUF) JANUARY 1, 1961— DECEMBER 31,1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/02/62
02
03
11/30/62
30
12/01/62
01
02
11/30/62
30
12/01/62
01
02
02
03
11/30/62
30
12/01/62
01
02
02
03
03
04
11/27/62
27
28
28
29
29
30
30
12/01/62
01
02
H
(m)
33
152
49
Average
40
462
78
362
33
Average
40
462
78
362
33
152
49
Average
40
462
78
362
33
152
49
461
56
Average
58
650
42
424
35
652
40
462
78
362
33
Average
U
(m/sec)
2.0
4.5
2*4_
(i.e., H x U):
2.6
2.2
2:i
1.7
£.0
(i.e., H x U):
2.6
2.2
2.1
1.7
2.0
4.5
3.4
(i.e., H x U):
2.6
2.2
2.1
1.7
2.0
4.5
3.4
2.7
2.8
(i.e., H x U):
2.5
2.3
2.7
3.7
3.2
2.7
2.6
2.2
2.1
1.7
2.0
(i.e., H~x~U):
H x U
(m2/sec)
66.0
684.0
ije^e
305.5
104.0
1016.4
163.8
615.4
66.0
393.1
104.0
1016.4
163.8
615.4
66.0
684.0
166.6
402.3
104.0
1016.4
163.8
615.4
66.0
-684.0
1.66.6
1244. 7
156.8
468.6
145.0
1495.0
113.4
1568.8
112.0
1760.4
104.0
1016.4
163.8
615.4
66.0
650.9
Limits
HL UL No.
250 6.0 3
500 4.0 1
500 6.0 1
750 4.0 1
500 6.0 1
750 4.0 1
750 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episoH°s with these Limits.
B-9
-------
BURWOOD, LOUISIANA (BRJ) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
_Muig_
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
02/04/60
04
H5
12/21/64
21
22
22
23
01/10/60
10
11
11
12
12
13
01/10/60
10
11
11
12
12
13
13
14
05/16/61
17
17
18
18
19
19
20
20
21
21
H
(m)
56
56
80
Average
121
199
198
198
67
Average
50
87
74
193
67
104
154
Average
50
87
74
193
67
104
154
267
105
Average
984
589
763
70
537
155
642
145
543
431
604
Average
U
(m/sec)
3.9
3.3
2.5
(i.e., H x U):
2.8
2.0
0.5
2.5
•0.8
(i.e., FTTH):
2.4
3.6
2.5
4.0
3.7
3.0
4.0
(i.e., HTU):
2.4
3.6
2. .5
4.0
3.7
3.0
4.0
3.0
2.'6
(i.e., H x U):
2.5
2.5
3.5
2.3
3.3
3.0
4.0
0.7
3.0
3.3
3.5
(i.e., H x U):
H x U
(m2/sec)
218.4
184.8
200.0
201.1
338.8
398.0
99.0
495.0
53.6
276.9
120.0
313.2
185.0
772.0
247.9
312.0
616.0
366.6
120.0
313.2
185.0
772.0
247.9
312.0
616.0
501.0
273.0
404.5
2460.0
1472.5
2670.5
161.0
1772.1
465.0
2568.0
101.5
1629.0
1422.3
2114.0
1530.5
Limits
HL UL No.
250 4.0 7
250 4.0 3
250 4.0 1
250 8.0 1
500 4.0 1
1000 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-10
-------
CAPE HATTERAS, NORTH CAROLINA (HAT) JANUARY 1, 1960—DECEMBER 31,1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Aftn
Mrng
Aftn
Mrng
Aftn
Mrna
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
11/12/63
12
13
01/22/64
22
23
23
24
12/04/60
04
05
05
06
06
07
12/03/60
04
04
05
05
06
06
07
07
05/18/62
18
19
19
20
20
21
21
22
22
23
H
(m)
140
164
36
Average
94
130
102
115
38
Average
56
295
35
446
43
257
80
Average
787
56
295
35
• 446
43
257
•80
80
Average
386
596
67
719
112
451
180
309
74
74
277
Average
U
(m/sec)
2.9
3.0
1.4
(i.e., TTFiJ):
4.9
3.3
3.3
4.4
3.1
(i.e., H x U):
3.2
3.5
3.2
2.7
2.8
2.0
4.5
(i.e., FTU):
5.5
3.2
3.5
3.2
2.7
2.8
2.0
4.5
4. '3
(i.e., H x U):
5.3
5.3
1.8
6.3
1.8
5.0
4.5
7.7
1.4
6.9
3.0
(i.e., iTTU):
H x U
(m2/sec)
406.0
492.0
50.4
3T6.1
460.6
429.0
336.6
506.0
117.8
370.0
179.2
1032.5
112.0
1204.2
120.4
514.0
360.0
503.2
4328.5
179.2
1032.5
112.0
1204.2
120.4
514.0
360.0
344.0
910.5
2045.8
3158.8
120.6
4529.7
201.6
2255.0
810.0
2379.3
103.6
510.6
831.0
1540.5
Limits
HL UL No.
250 4.0 3
250 6.0 1
500 6.0 2
1000 6.0 1
750 8.0 1
750 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episof^s with these Limits.
B-ll
-------
CARIBOU, MAINE (CAR) JANUARY 1, 1960—DECEMBER 31,1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrno
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
12/04/62
04
05
11/29/62
29
30
30
12/01/62
11/28/62
28
29
29
30
30
12/01/62
11/27/62
27
28
28
29
29
30
30
12/01/62
10/26/60
27
27
28
28
29
29
30
30
31
31
H
(m)
147
210
105
Average
128
214
48
168
121
Average
91
254
128
214
48
168
121
Average
175
479
91
254
128
214
48
168
121
Average
1116
604
1021
135
797
123
1114
133
835
327
596
Average
U
(m/sec)
1.1
2.0
1.5
(i.e., H x U):
2.1
4.5
1.0
4.0
2.1
(i.e., H x U):
1.6
2.5
2.1
4.5
1.0
4.0
2.1
(i.e., H x U):
3.0
6.3
1.6
2.5
2,1
4.5
1.0
4.0
2.1
(i.e. , H x U):
8.0
6.3
5.3
1.2
1.7
2.4
4.8
3.2
6.5
4.0
5.7
(i.e., H x U):
H x U
(m2/sec)
161.7
420.0
157.5
246.4
268.8
963.0
48.0
672.0
254.1
441.2
145.6
635.0
268.8
963.0
48.0
672.0
254.1
426.6
525.0
3017.7
145.6
635.0
268.8
963.0
48.0
672.0
254.1
725.5
8928.0
3805.2
5411.0
162.0
1354.9
295.2
5347.2
425.6
5427.5
1308.0
3397.2
3260.2
Limits
HL UL No.
250 2.0 1
250 6.0 1
500 6.0 1
500 8.0 1
1500 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episof4°s with these Limits.
B-12
-------
CHARLESTON, SOUTH CAROLINA (CHS) JANUARY 1, 1960-DECEMBER 31,1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
10/23/64
23
24
11/09/63
09
10
10
11
12/04/60
04
05
05
06
06
07
01/13/62
13
14
14
15
15
16
16
17
01/13/62
13
14
14
15
15
16
16
17
17
18
H
(m)
138
187
72
Average
40
840
92
280
136
Average
46
852
34
1180
34
1145
46
Average
56
968
117
273
36
295
97
645
68
Average
56
968
117.
273
36
295
97
645
68
992
83
Average
U
(m/sec)
3.1
6.0
2.9
(i.e., TTTU):
0.5
1.0
2.1
3.5
3.6
(i.e., TTTU):
0.4
2.5
1.6
2.6
2.3
1.4
0.0
(i.e., H~x~U):
1.5
3.2
4.3
5.5
1.4
7.5
1.4
4.5
2.1
(i.e., H x U):
1.5
3.2
4.3
5.5
1.4
7.5
1.4
4.5
2.1
3.6
3.2
(i.e., H x U):
H x U
(m2/sec)
427.8
1122.0
208.8
586.2
20.0
840.0
193.2
980.0
489.6
504.6
18.4
2130.0
54.4
3068.0
78.2
1603.0
4.6
993.8
84.0
3097.6
503.1
1501.5
50.4
2212.5
135.8
2902.5
142.8
1181.1
84.0
3097.6
503.1
1501.5
50.4
2212.5
135.8
2902.5
142.8
3571.2
265.6
1315.2
Limits
HL UL No.
250 6.0 1
1000 4.0 1
500 8.0 2
1500 4.0 5
750 8.0 3
2000 4.0 2
1000 8.0 2
2000 4.0 1
1000 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-13
-------
COLUMBIA, MISSOURI (CBI) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrna
Aftn
Mrng
Mrnq
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
01/16/62
16
17
01/15/62
16
16
17
17
12/21/63
21
22
22
23
23
24
12/21/63
21
22
22
23
23
24
24
25
12/21/63
21
22
22
23
23
24
24
25
25
26
H
(m)
46
90
44
Average
492
46
90
44
340
Average
352
473
177
258
172
333
188
Average
352
473
177
258
172
333
188
42.3
52
Average
352
473
177
258
172
333
188
423
52
263
192
Average
U
(m/sec)
1.3
3.8
0.7
(i.e., H x U):
2.7
1.3
3.8
0.7
•6.0
(i.e., H x U):
3.3
3.0
3.5
3.5
4.5
5.0
6.0
(i.e., H x U):
3.3
3.0
3.5
3.5
4.5
5.0
6.0
6.0-
2.9
(i.e., H~TTF):
3.3
3.0
3.5
3.5
4.5
5.0
6.0
6.0
2.9
5.5
6.0
(i.e., H x U):
H x U
(m2/sec)
59.8
342.0
30.8
144.2
1328.4
59.8
342.0
30.8
2040.0
760.2
1161.6
1419.0
619.5
903.0
774.0
1665.0
1128.0
1095.7
1161.6
1419.0
619.5
903.0
774.0
1665.0
1128.0
' 2-538.3
150.8
1151.0
1161.6
1419.0
619.5
903.0
774.0
1665.0
1128.0
2538.0
150.8
1446.5
1152.0
1177.9
Limits
HL UL No.
250 4.0 1
750 4.0 2
500 6.0 4
500 6.0 1
500 6.0 1
500 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-14
-------
DAYTON, OHIO (DAY) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrncj
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
11/10/63
10
11
01/01/63
01
02
02
03
01/01/63
01
02
02
03
03
04
01/01/63
01
02
02
03
03
04
04
05
01/01/63
01
02
02
03
03
04
04
05
05
06
H
(m)
148
256
109
Average
358
611
224
346
501
Average
358
611
224
346
501
501
149
Average
358
611
224
346
501
501
149
208
293
Average
358
611
224
346
501
501
149
208
293
293
606
Average
U
(m/sec)
2.8
3.5
3.5
(i.e., H x U):
0.7
0.7
3.0
1.7
•2.3
(i.e., H x U):
0.7
0.7
3.0
1.7
2.3
4.0
1.8
(i.e., H x U):
0.7
0.7
3.0
1.7
2.3
4,0
1.8
2.5
3.5
(i.e., iTx~0):
0.7
0.7
3.0
1.7
2.3
4.0
1.8
2.5
3.5
1.5
1.7
(i.e., iTinj):
H x U
(m2/sec)
414.4
896.0
381.5
564.0
250.6
427.7
672.0
588.2
1152.3
618.2
250.6
427.7
672.0
588.2
1152.3
2004.0
268.2
766.1
250.6
427.7
672.0
588.2
1152.3
2004.0
268.2
, 520.0
1025.5
767.6
250.6
427.7
672.0
588.2
1152.3
2004.0
268.2
520.0
1025.5
439.5
1030.2
761.6
Limits
HL UL No.
250 8.0 1
500 4.0 5
500 6.0 1
1500 2.0 1
750 4.0 1
750 4.0 1
750 4.0 1
750 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-15
-------
DENVER, COLORADO (DEN) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrnq
Aftrt
Mrng
Aftn
Mrng
Mrno
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Aftn
Mrng
Aftn
Mrna
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
01/16/62
16
17
01/16/62
16
17
17
18
01/07/61
07
08
08
09
09
10
01/06/61
07
07
08
08
09
09
10
10
01/05/61
05
06
06
07
07
08
08
09
09
10
H
(m)
30
71
35
Average
30
71
35
89
116
Average
39
79
38
329
72
155
49
Average
391
39
79
38
.329
72
155
.49
352
Average
50
198
64.
391
39
79
38
329
72
155
49
•Average
U
(m/sec)
3.3
1.9
2.1
(i.e., H x U):
3.3
1.9
2.1
3.4
0.2
(i.e., H~x~U):
3.2
2.6
2.6
3.0
4.0
1.5
2.3
(i.e., TTTU):
2.7
3.2
2.6
2.6
3.0
4.0
1.5
2.3
2.0
(i.e., H x U):
5.8
2.0
4.1
2.7
3.2
2.6
2.6
3.0
4.0
1.5
2.3
(i.e., HnnJ):
H x U
(m2/sec)
99.0
134.9
73.5
102.5
99.0
134.9
73.5
302.6
23.2
126.6
124.8
205.4
98.8
987.0
288.0
232.5
112.7
409.8
1055.7
124.8
205.4
98.8
987.0
288.0
232.5
112.7
704.0
423.2
290.0
396.0
262.4
1055.7
124.8
205.4
98.8
987.0
288.0
232.5
112.7
368.5
Limits
HL UL No.
250 4.0 10
500 2.0 1
250 4.0 1
500 4.0 1
500 4.0 1
500 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
0.1 m/sec.
B-16
-------
DODGE CITY, KANSAS (DDC) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng"
Date
Mo/Da/Yr
01/14/63
14
15
01/14/63
14
15
15
16
12/24/63
24
25
25
26
26
27
12/23/63
23
24
24
25
25
26
26
27
12/23/63
23
24
24
25
25
26
26
27
27
28
H
(m)
38
45
54
Average
38
45
54
197
93
Average
45
50
45
88
54
47
28
Average
53
188
45
50
45
88
54
47-
28
Average
53
188
45
50
45
88
54
47
28
79
444
Average
U
(m/sec)
3.1
5.0
4.4
(i.e., H x U):
3.1
5.0
4.4
4.0
4.0
(i.e., H x U):
7.1
6.0
5.4
4.8
7.7
5.8
3.8
(i.e., H x U):
4.6
7.5
7.1
6.0
5.4
4'. 8
7.7
5.8
3.8
(i.e., H x U):
4.6
7.5
7.1
610
5.4
4.8
7.7
5.8
3.8
4.5
4.7
(i.e., fTTU):
H x U
(m2/sec)
117.8
225.0
237.6
193.5
117.8
225.0
237.6
788.0
372.0
348.1
319.5
300.0
243.0
422.4
415.8
272.6
106.4
297.1
243.8
1410.0
319.5
300.0
243.0
422.4
415.8
272.6
106.4
414.8
243.8
1410.0
319.5
300.0
243.0
422.4
415.8
272.6
106.4
355.5
2086.8
561.4
Limits
HL UL No.
250 6.0 8
250 6.0 3
250 8.0 3
250 8.0 1
500 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-17
-------
EL PASO, TEXAS (ELP) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrna
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/21/64
22
22
12/21/64
21
22
22
23
12/24/63
24
25
25
26
26
27
11/25/61
25
26
26
27
27
28
28
29
12/18/60
18
19
19
20
20
21
21
22
22
23
H
(m)
356
291'
271
Average
376
356
291
271
248
Average
101
659
80
583
14
503
79
Average
86
623
43
490
-75
912
93
574-
89
Average
66
514
61
606
75
358
89
900
75
564
66
Average
U
(m/sec)
1.0
1.0
1.0
(i.e., innr):
1.7
1.0
1.0
1.0
1.5
(i.e., H x U):
0.7
2.0
0.3
4.0
2.4
3.0
1.5
(i.e., H x U):
1.0
2.7
1.2
2.3
2.0
3.3
2.2
2.0
0.5
(i.e. , H x U):
3.5
1.7
4.9
4.0
5.8
4.3
1.8
2.0
2.2
1.3
2.2
(i.e., H x U):
H x U
(m2/sec)
356.0
291.0
271.0
306.0
639.2
356.0
291.0
271.0
372.0
385.8
70.7
1318.0
24.0
2332.0
33.6
1509.6
118.5
772.3
86.0
1682.1
51.6
1127.0
150.0
3009.6
204.6
1148.0
44.5
833.7
231.0
873.8
298.9
2424.0
435.0
1539.4
160.2
1800.0
165.0
733.2
145.2
800.5
Limits
HL UL No.
500 2.0 2
500 2.0 1
750 4.0 1
1000 4.0 2
1000 6.0 2
1500 4.0 4
H = Mixing height.
U = Wind speed averaged throuqh H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-18
-------
ELY, NEVADA (ELY) JANUARY 1, I960—DECEMBER 31, 1961
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
02/06/62
06
07
11/28/63
28
29
29
30
11/28/63
28
29
29
30
30
12/01/63-
11/21/64
21
22
22
23
23
24
24
25
11/20/64
20
21
21
22
22
23
23
24
24
25
H
(m)
41
219
88
Average
108
536
72
471
67
Average
108
536
72
471
67
666
50
Average
32
595
37
566
41
676
44
452
106
Average
37
460
32
595
37
566
41
676
44
452
106
Average
U
(tn/sec)
4.4
1.5
4.0
(i.e., mm):
0.0
1.2
3.7
1.0
3.1
(i.e., H~TU):
0.0
1.2
3.7 '
1.0
3.1
1.3
3.7
(i.e., H x U):
3.9
1.5
2,2
1.7
4.0
1.0
3.5
1.7
0'.5
(i.e., MTU):
3.8
1.7
3.9
1.5
2.2
1.7
4.0
1.0
3.5
1.7
0.5
(i.e., H x U):
H x U
(m2/sec)
180.4
328.5
352.0
ZBitt
10.8
643.2
266.4
471.0
207.7
319.8
10.8
643.2
266.4
471.0
207.7
865.8
185.0
378.6
124.8
892.5
81.4
962.2
164.0
676.0
154.0
768.4
53.0
430.7
140.6
782.0
124.8
892.5-
81.4
962.2
164.0
676.0
154.0
768.4
53.0
436.3
Limits
HL UL No.
250 6.0 2
750 4.0 3
500 6.0 5
750 4.0 2
500 6.0 1
750 4.0 1
750 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-19
-------
FLINT, MICHIGAN (FNT) JANUARY 1, 1960— DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
11/29/62
29
30
11/28/62
28
29
29
30
11/28/62
28
29
29
30
30
12/01/62
11/28/62
28
29
29
30
30
12/01/62
01
02
11/28/62
28
29
29
30
30
12/01/62
01
02
02
03
H
(m)
30.
421
43
Average
52
282
30
421
43
Average
52
282
30
421
43
427
33
Average
52
282
30
421
43
427
33
997
48
Average
52
282
30
421
43
427
33
997
48
337
115
Average
U
(m/sec)
0.3
1.3
1.0
(i.e., H x U):
2.2
4.0
0.3
1.3
1.0
(i.e., H x U):
2.2
4.0
0.3
1.3
1.0
3.0
0.3
(i.e., H x U):
2.2
4.0
0.3
1.3
1.0
3;o
0.3
2.5
2.0
(i.e., MTU):
2.2
4.0
0.3
1.3
1.0
3.0
0.3
2.5
2.0
4.7
1.8
(i.e., H x U):
H x U
(m2/sec)
9.0
547.3
43.0
199.8
114.4
1128.0
9.0
547.3
43.0
368.3
114.4
1128.0
9.0
547.3
43.0
1281.0
9.9
447.5
114.4
1128.0
9.0
547.3
43.0
1281.0
9.9
2492.5
96.0
635.7
114.4
1128.0
9.0
547.3
43.0
1281.0
9.9
2492.5
96.0
1583.9
207.0
682.9
Limits
HL UL No.
500 2.0 1
500 4.0 1
500 4.0 1
1000 4.0 1
1000 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to _ define episodes.
No. = Total number of episodes with these Limits.
B-20
-------
GLASGOW, MONTANA (GGW) JANUARY 1, 1960-DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mr no
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrncj
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
•Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
03/15/62
15
16
12/01/b'J
02
02
03
03
01/28/60
28
29
29
30
30
31
01/27/60
27
28
28
29
29
30
30
31
01/26/60
27
27
28
28
29
29
30
30
31
31
H
(m)
29
151
50
Average
139
24
57
68
132
Average
35
56
36
134
46
63
59
Average
53
172
35
56
.36
134
46
63
59
Average
170
53
172.
35
56
36
134
46
63
59
92
Average
U
(m/sec)
0.0
1.5
1.7
(i.e., H x U):
0.0
1.5
2.3
2.9
•0.9
(i.e., H"TTJ):
3.8
4.0
3.2
2.1
2.4
3.6
3_,4_
(i.e., H x U):
0.0
4.5
3.8
4.0
3.2
2.1
2.4
3.6..
3.4
(i.e., MTU):
3.5
0.0
4.5
3.8
4.0
3.2
2.1
2.4
3.6
3.4
1.9
(i.e., H x U):
H x U
(m2/sec)
2.9
226.5
85.0
104.7
13.9
36.0
131.1
197.2
118.8
99.4
133.9
244.0
115.2
281.4
110.4
226.8
2D(L6_
187.3
5.3
774.0
133.0
244.0
115.2
281.4
110.4
226.8
200.6
232.3
595.0
5.3
774.0
133.0
244.0
115.2
281.4
110.4
226.8
200.6
174.8
260.1
Limits
HL UL No.
250 2.0 1
250 4.0 7
250 4.0 1
250 6.0 3
250 6.0 3
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-21
-------
GRAND JUNCTION, COLORADO (GJT) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
_Mrng_
Mrna
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Aftn
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Aftn
Mrna
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
01/24/63
24
25
01/23/63
23
24
24
25
12/26/62
27
27
28
28
29
29
12/25/62
26
26
27
27
28
28
29
29
01/21/63
21
22
22
23
23
24
24
25
25
26
H
(m)
39
126
121
Average
68
302
39
126
121
Average
167
80
265
58
234
109
287
Average
162
5
167
80
265
58
234
109
287
Average
84
340
60
230
68
302
39
126
121
307
47
•Average
U
(m/sec)
0.7
0.9
0.8
(i.e., H x U):
0.7
1.7
0.7
0.9
0.8
(i.e., H x U):
0.5
2.0
1.5
1.1
2.0
2.0
0.5
(i.e., H x U):
1.5
2.4
0.5
2.0
1.5
1.1
2.0
2.0
0.'5
(i.e., H x U):
1.1
1.7
1.0
2.5
0.7
1.7
0.7
0.9
0.8
2.7
0.9
(i.e., H~xU):
H x U
(m2/sec)
27.3
113.4
96.8
79.2
47.6
513.4
27.3
113.4
96.8
159.7
83.5
160.0
397.5
63.8
468.0
218.0
143.5
219.2
243.0
12.0
83.5
160.0
397.5
63.8
468.0
218.0
143.5
198.8
92.4
578.0
60.0
575.0
47.6
513.4
27.3
113.4
96.8
828.9
42.3
270.5
Limits
HL UL No.
250 2.0 7
500 2.0 7
250 4.0 1
500 2.0 2
500 4.0 4
500 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values'of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-22
-------
GREAT FALLS, MONTANA (GTF) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
W/W.,2
'16
07
03/05/62
05
06
06
07
03/05/f-2
05
06
06
07
07
08
10/30/62
30
31
31
11/01/62
01
02
02
03
10/30/62
31
31
r
0.4
(i.e., THTU):
1.6
3.5
0.4
4.1
1.9
(i.e., MTU):
1.6
3.5
0.4
4.1
1.9
3.3
5.5
(i.e., H~x~U):
2.2
7.7
4.7
3.0
3.1
4.3
5.3
s'.o
5.7
(i.e., H~>TU):
2.2
7.7
4.7
3.0
3.1
4.3
5.3
3.0
5.7
6.5
4.2
(i.e., H x U):
H x U
o
(m /sec)
51.3
33F.~>
22, .:
137.2
233.6
557.-1
38.5
543.3
112.1
2°9.0
233.6
567.0
33. G
543.3
112.1
1306.8
264.:
437.9
147.4
4812.5
474.7
489.0
130.2
4110.8
.328.6
1848.0
501. c
1427.0
147.4
4812.5
474.7
489.0
130.2
4110.8
328. f-
1843.')
501.6
61 6.",. 5
2,01.6
17sP.fi
Limits
HL UL No.
?.£0 2.i 1
250 6.0 1
500 6.0 1
1000 8.0 1
1000 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-23
-------
GREEN BAY, WISCONSIN (CRB) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrna
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
11/29/62
29
3:1
"2/06/61
06
07
07
'18
02/05/61
05
06
06
07
37
08
11/24/62
24
25
25
26
26
27
27
28
11/24/62
24
25
25
26
26
27
27
28
28
29
H
(m)
25
204
1'.
Average
59
417
43
363
63
Average
37
174
59
417
43
363
63
Average
88
218
45
260
142
434
343
375
98
Average
88
218
45
260
142
434
343
375
98
383
25
Average
U
(m/sec)
2.3
1.5
1.6
(i.e., H x U):
3.9
2.3
0.3
1.3
2.5
(i.e., H x U):
2.3
6.0
3.9
2.3
0.3
1.0
2.5
(i.e., H x U):
1.6
2.5
0.2
3.0
2.4
8.0
7.7
4.7
0.6
(i.e., H x U):
1.6
2.5
0.2
3.0
2.4
8.0
7.7
4.7
0.6
4.0
2.3
(i.e., H x U):
H x U
(m2/sec)
57.5
306.")
113.4
in. 6
230.1
959.1
12.9
363.0
157.5
344.5
85.1
1044.0
230.1
959.1
12.9
563.0
157.5
407.4
140.8
545.0
9.0
780.0
340.8
3472.0
2641.1
1762.5
58.8
1083.3
140.8
545.0
9.0
780.0
340.8
3472.0
2641.1
1762.5
58.8
1532.0
, 57.5
1030.9
Limits
HL UL No.
250 4.0 4
500 4.0 4
750 4.0 1
500 6.0 1
1000 4.0 1
500 8.0 1
500 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-24
-------
GREENSBORO, NORTH CAROLINA (CSO) JANUARY 1, 1960—DECEMBER 31, 1961
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
.Mrng_
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Date
Mo/Da/Yr
11/12/60
12
13
01/03/64
03
04
04
05
11/11/60
11
12
12
13
13
14
10/05/61
06
06
07
07
08
08
09
09
10/25/64
25
26
26
27
27
28
28
29
29
30
H
(m)
57.
682
43
Average
62
243
118
234
77
Average
74
916
57
682
43
1220
60
Average
1606
62
1523
47
1619
56
1732
36-
1923
Average
91
1392
44
1302
62
1367
61
1414
112
1478
71
Average
U
(m/sec)
0.6
1.7
0.9
(i.e.., H x U):
4.7
7.0
3.0
6.0
1.3
(i.e., H~nJ):
0.0
2.5
0.6
1.7
0.9
2.0
0.3
(i.e., H x U):
2.0
0.6
1.-6
1.4
1.8
1.1
2.0
0.8
1.7
(i.e., JTxU):
2.6
2.6
0.7
2.6
1.1
3.6
1.4
3.8
1.6
2.6
1.5
(i.e., H x U):
H x U
(m2/sec)
34.2
1159.4
38.7
410.8
291.4
1701.0
354.0
1404.0
100.1
770.1
7.4
2290.0
34.2
1159.4
38.7
2440.0
18.0
855.4
3212.0
37.2
2436.8
65.8
2914.2
61.6
3464.0
28.8
3269.1
1721.1
236.3
3619.2
30.8
3385.2
68.2
4921.2
85.4
5373.2
179.2
3842.8
106.5
1986.2
Limits
HL UL No.
750 2.0 1
250 6.0 1
250 8.0 1
1000 6.0 2
3000 2.0 1
1500 4.0 7
2000 2.0 1
1500 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
m/sec.
B-25
-------
HUNT1NGTON, WEST VIRGINIA (HTS) JANUARY 1, 1962—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/03/62
03
04
12/02/62
02
03
03
04
11/07/64
07
08
08
09
09
10
11/06/64
06
07
07
08
08
09
09
10
09/15/63
15
16
16
17
17
18
18
19
19
20
H
(m)
40 '
270
74
Average
72
385
40
270
74
Average
57
566
92
294
34
695
23
Average
218
851
57
566
92
294
34.
695
23
Average
386
1094
226
1350
244
1054
133
1125
30
1351
62
Average
U
(m/sec)
1.9
1.0
1.6
(i.e., H x U):
0.8
2.0
1.9
1.0
1.6
(i.e., H x U):
0.0
1.0
0.0
1.8
0.0
2.3
1.9
(i.e., H~TTJ).:
1.0
2.3
0.0
1.0
0.0
1.8
0.0
2.3
1.9
(i.e., H x U):
2.7
3.3
0.5
3.0
1.0
3.3
0.0
1.3
0.0
2.6
1.3
(i.e., H x U):
H x U
(m2/sec)
76.0
270.0
118.4
154.8
57.6
770.0
76.0
270.0
118.4
258.4
5.7
566.0
9.2
529.2
3.4
1598.5
43.7
393.7
218.0
1957.3
5.7
566.0
9.2
529.2
. 3.4
1598.5
43.7
547.9
1042.2
3610.2
113.0
4050.0
244.0
3478.2
13.3
1462.5
3.0
3512.6
t 80.6
1600.9
Limits
HL UL No.
500 2.0 2
500 2.0 1
750 4.0 2
1000 4.0 1
1500 4.0 1
1000 6.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-26
-------
INTERNATIONAL FALLS, MINNESOTA (INL) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnj
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
11/24/61
24
25
12/03/64
03
04
04
05
12/02/64
02
03
03
04
04
05
01/10/64
10
11
11
12
12
13
13
14
01/10/64
10
11
11
12
12
13
13
14
14
15
H
(m)
71
189
180
Average
136
478
218
473
86
Average
246
246
136
478
218
473
86
Average
190
354
111
339
15
318
113.
335
333
Average
190
354
111
339
15
318
113
335
333
496
244
Average
U
(m/sec)
0.9
2.5
2.0
(i.e., H x U):
2.4
2.9
3.5
2.7
0.0
(i.e., H x U):
3.5
3.5
2.4
2.9
3.5
2.7
0.0
(i.e., H x U):
7.0
3.7
4.0
3.3
0.4
7.0
3.6
7.0
3.0
(i.e., Tnnj):
7.0
3.7
4.0
3.3
0.4
7.0
3.6
7.0
3.0
4.3
8.0
(i.e., H~TU):
H x U
(m2/sec)
63.9
472.5
360.0
298.8
326.4
1386.2
763.0
1277.1
8.6
752.3
861.0
861.0
326.4
1386.2
763.0
1277.1
8.6
783.3
1330.0
1309.8
444.0
1118.7
6.0
2226.0
406.8
5695.0
999.0
1503.9
1330.0
1309.8
444.0
1118.7
6.0
2226.0
406.8
5695.0
999.0
2132.8
1,952.0
1601.8
Limits
HL UL No.
250 4.0 4
500 4.0 2
500 4.0 1
500 8.0 1
500 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations ofH x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-27
-------
JACKSON, MISSISSIPPI (JAN) JANUARY 1, 1959—DECEMBER 31, 1962
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
11/25/60
25
26
12/17/60
17
18
18
19
11/24/60
24
25
25
26
26
27
01/22/60
22
23
23
24
24
25
25
26
01/21/60
21
22
22
23
23
24
24
25
25
26
H
(m)
124
1147
51
Average
24
887
57
1314
41
Average
830
876
124
1147
51
1190
109
Average
157
304
604
624
788
1150
142
1126
85
Average
125
1255
157
304
604
624
788
1150
142
1126
85
Average
U
(m/sec)
0.2
0.3
0.0
(i.e., H x U):
0.2
2.0
0.0
1.3
0.0
(i.e., PTFTj):
1.7
1.7
0.2
0.3
0.0
3.3
0.2
(i.e., H x U):
4.0
4.7
5.0
2.7
2.7
2.0
1.6
2.8
1.3
(i.e., H x U):
1.1
4.3
4.0
4.7
5.0
2.7
2.7
2.0
1.6
2.8
1.3
(i.e., H~xU):
H x U
(m2/sec)
248.0
344.1
,5.1
'
199.1
4.8
1774.0
5.7
1708.2
4.1
699.4
1411.0
1489.2
248.0
344.1
5.1
3927.0
21.8
1063.7
628.0
1428.8
3020.0
1684.8
2127.6
2300.0
227.2
3152.8
110.5
1631.1
137.5
5396.5
628.0
1428.8
3020.0
1684.8
2127.6
2300.0
227.2
3152.8
110.5
1837.6
Limits
HL UL No.
500 6.0 2
1500 2.0 17
750 4.0 6
1500 2.0 4
750 4.0 1
750 8.0 1
1000 6.0 3
1500 4.0 2
1500 6.0 6
1500 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-28
-------
JACKSONVILLE, FLORIDA (JAX) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
02/04/62
04
05
01/20/62
20
21
21
22
01/19/62
19
20
20
21
21
22
12/17/62
17
18
18
19
19
20
20
21
12/15/62
15
16
16
17
17
18
18
19
19
^Q_
H
(m)
61
306
129
Average (i .
472
382
331
372
132
Average (i .
395
415
472
382
331
372
132
Average ( i .
279
1264
96
1091
40
1006
102
877
252
Average ( i .
66
1229
64
1081
279
1264
96
1091
40
1006
102
Average (i.
U
(m/sec)
0.8
3.7
1.6
e., H x
4.7
4.3
4.7
5.0
2.9
e., FT
5.0
4.3
4.7
4.3
4.7
5.0
2.9
e., H x
3.5
3.8
0.9
2.8
0.0
3.4
0.4
2.8
2.0
e.s H x
0.5
2.1
0.8
4.4
3.5
3.8
0.9
2.8
0.0
3.4
0^4
e., H~T
H x U
(m2/sec)
48.8
1132.2
206.4
U): 462.5
2218.4
1642.6
1555.7
1860.0
382.8
TJ): 1531.9
1975.0
1784.5
2218.4
1642.6
1555.7
1860.0
382.8
U): 1631.3
976.5
4803.2
86.4
3054.8
4.0
3420.4
40.8
2455.6
504.0
U): 1705.1
33.0
2580.9
51.2
4756.4
976.5
4803.2
86.4
3054.8
4.0
3420.4
,40,8
U): 1800.7
Limits
HL UL No.
500 4.0 2
500 6.0 1
500 6.0 1
1500 4.0 1
1500 6.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-29
-------
LAKE CHARLES, LOUISIANA (LCH) JANUARY 1, 1962--DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrnj
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrno
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
07/29/64
29
30
09/03/62
03
04
04
05
10/13/63
13
14
14
15
15
16
10/12/63
12
13
13
14
14
15
15
16
10/11/63
n
12
12
13
13
14
14
15
15
16
H
(m)
115
100
232
Average
169
373
211
325
332
Average
142
961
69
977
102
1303
62
Average
107
1443
142
961
.69
977
102
1303
62
Average
79
1763
107
1443
142
961
69
977
102
1303
62
Average
U
(m/sec)
2.3
5.1
2.0
(i.e., TnTU):
3.5
5.3
•3.0
3.0
. 1.7
(i.e., HTTJ):
0.4
2.5
1.2
3.3
2.2
2.0
2.3
(i.e., H x U):
0.4
3.0
0.4
2.5
1.2
3.3
2.2
2.0
2.3
(i.e., H x U):
0.0
3.3
0.4
3.0
0.4
2.5
1.2
3.3
2.2
2.0
2.3
(i.e., H x U):
H x U
(m2/sec)
264.5
510.0
464.0
412.8
591.5
1976.9
633.0
975.0
564.4
948.2
56.8
2402.5
82.8
3224.1
224.4
2606.0
142.6
1248.5
42.8
4329.0
56.8
2402.5
82.8
3224.1
224.4
'2606.0
142.6
1456.8
7.9
5817.9
42.8
4329.0
56.8
2402.5
82.8
3224.1
224.4
2606.0
142.6
1721.5
Limits
HL UL No.
250 6.0 1
500 6.0 2
1500 4.0 1
750 8.0 1
1500 4.0 1
2000 4.0 3
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-30
-------
LANDER, WYOMING (LND) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Date
Mo/Da/Yr
12/10/60
10
11
12/09/60
10
10
11
11
12/09/60
09
10
10
11
11
12
12/10/60
10
11
11
12
12
13
13
14
12/09/60
09
10
10
11
11
12
12
13
13
14
H
(m)
117
221
71
Average
212
117
221
71
207
Average
97
212
117
221
71
207
100
Average
117
221
71
207
100
227
54
231
61
Average
97
212
117-
221
71
207
100
227
54
231
61
•Average
U
(m/sec)
0.0
0.0
0.0
(i.e., H x U):
0.0
0.0
0.0
0.0
0.0
(i.e., H x U):
0.7
0.0
0.0
0.0
0.0
0.0
0.9
(i.e., H x U):
0.0
0.0
0.0
0.0
0.9
1.0
1.9
.Q.O
0.2
(i.e., H x U):
0.7
0.0
0.0
0.0
0.0
0.0
0.9
1.0
1.9
0.0
0.2
(i.e., H x U):
H x U
(m /sec)
11.7
22.1
7.1
T3.6
21.2
11.7
22.1
7.1
20.7
16.6
67.9
21.2
11.7
22.1
7.1
20.7
90.0
34.4
11.7
22.1
7.1
20.7
90.0
227.0
102.6
23.1
12.2
57.4
67.9
21.2
11.7
22.1
7.1
20.7
90.0
227.0
102.6
23.1
12.2
55.1
Limits
HL UL No.
250 2.0 33
250 2.0 11
250 2.0 4
250 2.0 2
250 2.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-31
-------
LAS VEGAS, NEVADA (LAS) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrmj
Date
Mo/Da/Yr
12/17/63
17
18
12/24/60
24
25
25
26
12/24/60
24
25
25
26
26
27
12/16/63
16
17
17
18
18
19
19
20
12/11/62
11
12
12
13
13
14
14
15
15
16
H
(m)
29
239
39
Average
23
400
40
394
37
Average
23
400
40
394
37
439
56
Average
26
572
29
239
39
583
42
741
68
Average
65
284
41
561
37
596
37
470
38
613
30
Average
U
(m/sec)
2.3
0.5
3.0
(i.e., H x U):
2.2
1.3
3.0
0.0
3.1
(i.e., H x U):
2.2
1.3
3.0
0.0
3.1
2.0
2.3
(i.e., H x U):
3.0
1.0
2.3
0.5
3.0
0.7
2,1
0.7
2.5
(i.e., H x U):
3.7
0.5
3.3
1.0
2.8
1.3
2.2
1.0
1.3
0.7
3.7
(i.e., H x U):
H x U
(m2/sec)
87.0
119.5
117.0
107.8
50.6
520.0
120.0
39.4
114.7
168.9
50.6
520.0
120.0
39.4
114.7
878.0
128.8
264.5
78.0
572.0
87.0
119.5
117.0
408.1
88.2
518.7
170.0
239.8
240.5
142.0
135.3
561.0
103.6
774.8
81.4
470.0
49.4
429.1
111.0
281.6
Limits
HL UL No.
250 4.0 3
500 4.0 6
500 4.0 1
500 6.0 1
750 4.0 8
750 4.0 3
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of K and I! used to define episodeo.
No. = Total number of episodes with these Limits.
B-32
-------
LITTLE ROCK, ARKANSAS (LIT) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnj
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
11/20/60
20
21
01/31/60
31
02/01/60
01
02
11/18/60
18
19
19
20
20
21
01/30/60
30
31
31
02/01/60
01
02
02
03
12/24/63
24
25
25
26
26
27
27
28
28
29
H
(m)
67
165
65
Average
318
281
491
479
142
Average
41
465
49
740
67
165
65
Average
821
873
318
281
491
479
142
437
755
Average
50
747
42
123
34
467
181
645
287
305
121
Average
U
(m/sec)
1.8
1.5
1.9
(i.e., H x U):
3.0
2.0
3.0
2.7
1.0
(i.e., H~x~U):
3.1
4.0
2.0
3.0
1.8
1.5
1.9
(i.e., H x U):
3.5
3.0
3.0
2.0
3.3
2.7
J.o
2.7
3.7
(i.e., H~T~U):
2.4
6.0
3.1
3.5
1.5
4.3
5.0
2.7
5.0
2.7
1.2
(i.e., H"TU):
H x U
(m2/sec)
120.6
247.5
123.5
163.9
954.0
562.0
1620.3
1293.3
142.0
914.3
127.1
1860.0
98.0
2220.0
120.6
247.5
123.5
685.2
2873.5
2619.0
954.0
562.0
1620.3
1293.3
142.0
1179.9
2793.5
1559.7
120.0
4482.0
130.2
430.5
51.0
2008.1
905.0
1741.5
1435.0
823.5
.145.2
1115.6
Limits
HL UL No.
250 2.0 1
500 4.0 1
750 4.0 2
1000 4.0 1
750 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0,0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-33
-------
MEDFORD, OREGON (MFR) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
01/30/62
30
31
01/29/62
29
30
30
31
01/06/63
06
07
07
08
08
09
12/26/62
26
27
27
28
28
29
29
30 .
11/30/63
30
12/01/63
01
02
02
03
03
04
04
05
H
(m)
92
193
90
Average
229
206
92
193
90
Average
272
237
151
288
107
123
143
Average
82
389
99
481
90
457
125
293
129
Average
83
73
282
238
322
209
277
256
295
262
201
Average
U
(tn/sec)
0.8
0.0
0.0
(i.e., TTxTJ):
0.0
0.5
0.8
0.0
0.0
(i.e., HTTJ):
0.0
0.0
1.0
0.0
0.4
0.8
0.4
(i.e., H x U):
0.5
0.0
0.0
0.0
1.2
1.0
0.5
0.5
0.4
(i.e. , H x U):
0.0
1.1
0.0
1.0
1.3
1.4
0.0
1.0
0.0
0.0
0.8
(i.e., H x U):
H x U
(m2/sec)
73.6
19.3
9.0
34.0
22.9
103.0
73.6
19.3
• 9.0
45.6
27.2
23.7
151.0
28.8
42.8
98.4
57.2
61.3
41.0
38.9
9.9
48.1
108.0
457.0
62.5
146.5
51.6
107.1
8.3
80.3
28.2
238.0
418.6
292.6
27.7
256.0
29.5
26.2
,160.8
142.4
Limits
HL UL No.
250 2.0 11
250 2.0 2
500 2.0 8
500 2.0 4
500 2.0 4
H = Mixing height.
U = Wind speed averaged through H. _,„-,,
In calculations of H x U, values of U = 0.0 m/sec_are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-34
-------
MIAMI, FLORIDA (MIA) JANUARY 1, 1960— DECEMBER 31, 1961
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
07/13/62
13
,14
12/02/62
02
03
03
_0_4_
12/02/62
02
03
03
04
04
05
12/10/63
10
11
11
12
12
13
13
14
12/11/63
11
12
12
13
13
14
14
15
15
16
H
(m)
438
438
104
Average
243
272
248
732
J.J6
Average
243
272
248
732
176
491
87
Average
214
726
110
768
122
940
742
833
113
Average
no
768
122
940
742
833
113
1048
397
25
279
Average
U
(m/sec)
3.7
1.7
0.6
(i.e., FT
3.0
'3.5
4.0
4.8
?--5_
(i.e., FT
3.0
3.5
4.0
4.8
2.5
5.0
1.2
(i.e., FT
3.5
3.5
0.3
5.0
0.0
4.3
5.0,
5.0
Oi6
(i.e., FT
0.3
5.0
0.0
4.3
5.0
5.0
0.6
4.8
4.3
5.6
5.0
(i.e., FT
H x U
(m2/sec)
1620,6
749.6
62.4
TJ): 809.2
729.0
952.0
992.0
3513.6
J4_0._0_
U): 1325.3
729.0
952.0
992.0
3513.6
440.0
2455.0
104.4
U): 1312.3
749.0
2541.0
33.0
3840.0
12.2
4,042.0
3710.0
4165.0
67.8
U): 2128.8
33.0
3840.0
12.2
4042.0
3710.0
4165.0
67.8
5030.4
1707.1
140.0
1395.0
U): 2194.8
Limits
HL UL No.
500 4.0 2
750 6.0 1
750 6.0 1
1000 6.0 1
1500 6.0 5
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-35
-------
MIDLAND, TEXAS (MAP) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
02/13/61
13
14
01/31/60
31
02/01/60
01
02
02/13/61
13
14
14
15
15
16
11/28/61
28
29
29
30
30
12/01/61
01
02
12/15/62
15
16
16
17
17
18
18
19
19
20
H
(m)
55
128
183
Average
177
482
113
416
159
Average
55
128
183
476
358
771
105
Average
732
723
750
.774
426
572
78
1072
116_
Average
62
982
86
1116
76
1084
200
564
323
1337
189
Average
U
(m/sec)
3.5
2.4
4.5
(i.e., H x U):
3.0
5.3
4.5
1.3
6.0
(i.e., TTirU):
3.5
2.4
4.5
5.7
4.0
5.0
2.9
(i.e., irnJ):
5.3
3.8
2.8
3.0
6.0
4.7
2.3
3.8
2.0
(i.e., H x U):
4.7
4.8
2.7
3.8
1.9
4.5
0.5
6.3
2.7 '
1.6
2.5
(i.e., H~TTJ):
H x U
(m2/sec)
192.5
307.2
823.5
441,1
531.0
2554.6
508.5
540.8
954.0
1017.8
192.5
307.2
823.5
2713.2
1432.0
3855.0
304.5
1375.4
3873.6
2747.4
2100.0
2322.0
2556.0
2688.4
179.4
4073.6
232.0
2308.0
291.4
4713.6
232.2
4240.8
144.4
4716.0
100.0
3553.2
872.1
2139.2
472.5
1952.3
Limits
HL UL No.
250 6.0 3
500 6.0 2
1000 6.0 2
750 8.0 1
1500 6.0 1
1500 8.0 3
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-36
-------
MONTGOMERY, ALABAMA (MGM) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
10/26/60
26
27
01/05/61
05
06
06
07
12/17/62
17
18
18
19
19
20
11/11/60
11
12
12
13
13
14
14
15
12/31/62
31
01/01/63
01
02
02
03
03
04
04
05
H
(m)
84'
193
171
Average
64
319
73
676
88
Average
157
761
43
932
47
930
191
Average
377
591
146
888
71
638
117
748
69
Average
153
708
98
673
100
632
89
915
75
829
115
Average
U
(m/sec)
0.9
4.0
3.0
(i.e., H x U):
0.0
2.3
0.0
2.0
1.3
(i.e., H x U):
1.3
2.3
2.0
2.3
0.7
3.3
3.5
(i.e., H x U):
3.3
2.3
2.8
3.3
2.7
2.7
2.5
4.0
2.3
(i.e., H x U):
5.0
4.0
2.0
3.7
2.1
5.7
2.2
4.3
1.8
1.7
1.9
(i.e., H~x~U):
H x U
(m2/sec)
75.6
772.0
513.0
453.5
6.4
733.7
7.3
1352.0
114.4
442.8
204.1
1750.3
86.0
2143.6
32.9
3069.0
668.5
1136.3
1244.1
1359.3
408.8
2930.4
191.7
1722.6
292.5
2992.0
158.7
1255.6
765.0
2832.0
196.0
2490.1
210.0
3602.4
195.8
3934.5
135.0
1409.3
218.5
1453.5
Limits
HL UL No.
250 4.0 2
750 4.0 2
1000 4.0 2
1000 4.0 1
1000 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-37
-------
NANTUCKET, MASSACHUSETTS (ACK) JANUARY 1,1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
_Mmg.
"
Date
Mo/Da/Yr
03/03/64
03
04
03/02/64
02
03
03
04
11/03/61
04
04
05
05
06
06
10/17/63
17
18
18
19
19
20
20
21
10/16/63
16
17
17
18
18
19
19
20
20
_2L
H
(m)
101
124
45
Average
123
139
101
124
45
Average
243
193
123
104
58
106
227
Average
46
65
125
276
206
271
71
27-9
75
Average
no
172
46-
65
125
276
206
271
71
279
75
Average
U
(m/sec)
3.2
3.0
1.5
(i.e., H x U):
4.9
3.9
3.2
3.0
1.5
(i.e., H x U):
7.0
6.5
6.2
2.9
4.4
3.1
3.0
(i.e., H x U):
3.7
8.0
2,9
5.0
3.5
4.5
2.4
4.. 5
3.2
(i.e., H x U):
4.1
8.0
3.7
8.0
2.9
5.0
3.5
4.5
2.4
4.5
3.2
(i.e., H x U):
H x U
(m2/sec)
323.2
372.0
67.5
254.2
602.7
542.1
323.2
372.0
67.5
381.5
1701.0
1254.5
762.6
301.6
255.2
328.6
681.0
754.9
170.2
520.0
362.5
1380.0
721.0
1219.5
170.4
•1255.5
240.0
671.0
451.0
1376.0
170.2
520.0
362.5
1380.0
721.0
1219.5
170.4
1255.5
240.0
715.1
Limits
HL UL No.
250 4.0 2
250 6.0 3
250 8.0 3
500 8.0 6
500 8.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-38
-------
NASHVILLE, TENNESSEE (BNA) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Jtaio.
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
01/12/61
12
13
02/01/60
01
02
02
03
11/11/60
n
12
12
13
13
Jl
11/10/60
11
11
12
12
13
13
14
14
12/31/62
31
01/01/63
01
02
02
03
03
04
04
05
H
(m)
53
872
55
Average
93
376
106
291
165
Average
262
867
63
757
62
622
113
Average
853
262
867
63
757
62
622
113
904
Average
284
743
293
457
120
783
118
1792
76
1195
149
Average
U
(m/sec)
0.6
0.0
0.6
(i.e., H x U):
1.0
3.7
1.6
4.0
1.0
(i.e., H x U):
1.0
0.8
0.0
4.0
0.5
3.7
1.1
(i.e., H x U):
5.5
1.0
0.8
0.0
4.0
0.5
3.7
1.1
4.0
(i.e., H x U):
3.0
3.0
2.0
3.0
1.3
3.7
1.5
3.2
1.4
2.0
2.2
(i.e., H x U):
H x U
(m2/sec)
31.8
87.2
33.0
50.7
93.0
1391.2
169.6
1164.0
165.0
596.6
262.0
693.6
6.3
3028.0
31.0
2301.4
124.3
920.9
4091.5
262.0
693.6
6.3
3028.0
31.0
2301.4
124.3
3616.0
1572.7
852.0
2229.0
586.0
1371.0
156.0
2897.1
177.0
5734.4
106.4
2390.0
327.8
1529.7
Limits
HL UL No.
1000 2.0 3
500 4.0 3
500 4.0 1
1000 4.0 2
1000 6.0 2
2000 4.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episoH^s with these Limits.
B-39
-------
NEW YORK, NEW YORK (JFK) JANUARY 1, I960— DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/02/61
02
03
10/18/63
18
19
19
20
10/18/63
18
19
19
20
20
21
11/30/62
30
12/01/62
01
02
02
03
03
04
11/29/62
29
30
30
12/01/62
01
02
02
03
03
04
H
(m)
72
175
137
Average
319
409
129
297
80
Average
319
409
129
297
80
393
167
Average
98
227
44
676
123
625
408
500
142
Average
45
464
98
227
44
676
123
625
408
500
142
Average
U
(m/sec)
1.3
4.0
2.1
(i.e., H x U):
2.7
2.0
2.0
2.0
2.0
(i.e., H~TU):
2.7
2.0
2.0
2.0
2.0
5.0
4.5
(i.e., H x U):
3.0
3.0
2.0
4.5
4.0
5.5
4.0
3.0
3.0
(i.e. , H x U):
4.0
5.0
3.0
3.0
2.0
4.5
4.0
5.5
4.0
3.0
3.0
(i.e., H x U):
H x U
(m2/sec)
93.6
700.0
204.7
"
332.8
861.3
818.0
258.0
594.0
160.0
538.3
861.3
818.0
258.0
594.0
160.0
1965.0
751.5
772.5
294.0
681.0
88.0
3042.0
492.0
3437.5
1632.0
1500.0
426.0
1288.1
180.0
2320.0
294.0
681.0
88.0
3042.0
492.0
3437.5
1632.0
1500.0
426.0
1281.1
Limits
HL UL No.
250 4.0 2
500 2.0 1
500 4.0 1
500 6.0 1
750 6.0 1
750 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to Define episodes.
No. = Total number of episoH^s with these Limits.
B-40
-------
NORTH PLATTE, NEBRASKA (LBF) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrr.g
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
01/30/60
30
31
01/10/60
10
11
11
12
01/10/60
10
11
11
12
12
13
01/09/60
09
10
10
11
11
12
12
13
01/08/60
09
09
10
10
11
11
12
12
13
13
H
(m)
82
167
85
Average
56
97
148
122
47
Average
56
97
148
122
47
99
97
Average
63
212
56
97
148
122
41
99
97
Average
276
63
212
56
97
148
122
47
99
97
168
•Average
U
(m/sec)
0.5
1.0
1.0
(i.e., H x U):
1.9
1.5
1.5
2.4
1.6
(i.e., H~xTJ):
1.9
1.5
1.5
2.4
1.6
3.8
0.0
(i.e., rx~U):
0.5
2.5
;.9
1.5
1.5
2.4
1.6
3.8
0.0
(i.e., H x U):
6.5
0.5
2.5
1.9
1.5
1.5
2.4
1.6
3.8
0.0
6.0
(i.e., H x U):
H x U
(m2/sec)
41.0
167.0
85.0
97.7
106.4
145.5
222.0
292.8
75.2
168.4
106.4
145.5
222.0
292.8
75.5
376.2
9.7
175.4
31.5
530.0
106.4
145.5
222.0
292.8
75.5
.. 376.2
9.7
198.8
1794.0
31.5
530.0
106.4
145. 5
222.0
292.8
75.5
376.2
9.7
1008.0
418.0
Limits
HL UL No.
250 2.0 2
250 4.0 2
250 4.0 2
250 4.0 2
500 8.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episor^s with these Limits.
B-41
-------
OAKLAND, CALIFORNIA (OAK) JANUARY 1, 1960—DECEMBER 31, 1961
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Aftn
!4rng
Aftn
l-lrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Jtoo.
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnj
Date
Mo/Da/Yr
12/20/62
20
21
12/19/62
20
20
21
21
01/30/62
30
31
31
02/01/62
01
_02
01/29/62
29
30
30
31
31
02/01/62
01
02
01/29/62
29
30
30
31
31
02/01/62
01
02
02
03
H
(m)
239
96
94
Average
122
239
96
94
118
Average
46
230
79
266
66
291
88
Average
56
382
46
230
79
266
66
291
88
Average
56
382
46
230
79
266
66
291
88
393
417
Average
U
(m/sec)
1.5
0.0
0.5
(i.e., Tnru):
2.7
1.5
0.0
0.5
2.4
(i.e., FTTTT):
1.1
3.5
0.0
3.0
0.4
3.0
0.4
(i.e., H~TU):
0.8
3.3
1..1
3.5
0.0
3.0
0.4
3.0
6.4
(i.e. , H x U):
0.8
3.3
1.1
3.5
0.0
3.0
0.4
3.0
0.4
3.3
1.0
(i.e., HTU):
H x U
(m2/sec)
358.5
9.6
47.0
138.4
329.4
358.5
9.6
47.0
283.2
205.5
50.6
805.0
7.9
798.0
26.4
873.0
35.2
370.9
44.8
1260.6
50.6
805.0
7.9
798.0
26.4
873.0
35.2
433.5
44.8
1260.6
50.6
805.0
7.9
798.0
26.4
373.0
35.2
1296.9
417.0
510.5
Limits
HL UL No.
250 2.0 1
250 4.0 4
500 4.0 16
500 4.0 9
500 4.0 7
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as O.I m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episor^s with these Limits.
B-42
-------
OKLAHOMA CITY, OKLAHOMA (OKC) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days :
Time
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Date
Mo/Da/Yr
01/07/60
08
08
01/07/60
07
08
08
09
12/12/63
12
13
13
14
14
15
09/29/64
29
30
30
10/01/64
01
02
02
03
09/28/64
28
29
29
30
30
10/01/64
01
02
02
03
H
(m)
166
57
102
Average
142
166
57
102
135
•"•=>.,-
389
565
434
418
379
654
104
Average
422
699
142
668
178
907
550
809
54
Average
399
1031
422
699
142
668
178
907
550
809
54
Average
U
(m/sec)
3.5
3.3
3.9
(i.e., H x U):
3.0
3.5
3.3
3.9
5.6
>' ' . . H x U) :
3.3
3.0
5.7
7.3
4.3
5.8
4.8
(i.e., H x U):
4.7
3.5
2-. 8
4.3
6.5
8.0
4.0
7.0
3.4
(i.e. , H x U):
4.7
3.8
4.7
3.5
2.8
4.3
6.5
8.0
4.0
7.0
3.4
(i.e., H x U):
H x U
(m2/sec)
581.0
188.1
397.8
388.9
426.0
581.0
188.1
397.8
756.0
469.8
1283.7
1695.0
2473.8
3051.4
1629.7
3793.2
499.2
2060.8
1983.4
2446.5
406.0
2872.4
1157.0
7256.0
2200.0
5663.0
183.6
2685.3
1875.3
3917.8
1983.4
2446.5
406.0
2872.4
1157.0
7256.0
2200.0
5663.0
183.6
2723.7
Limits
HL UL No.
250 4.0 1
250 6.0 1
750 8.0 1
1000 8.0 1
1500 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as OJ m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-43
-------
PEORIA, ILLINOIS (PIA) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
10/10/60
10
11
12/21/63
21
22
22
23
12/21/63
21
22
22
23
23
24
12/20/63
20
21
21
22
22
23
23
24
12/19/63
19
20
20
21
21
22
22
23
23
24
H
(m)
35
209
52
Average
124
251
49
279
57
Average
124
251
49
279
57
120
125
Average
335
307
125
251
49
279
57
120
125
Average
146
235
335
307
125
251
49
279
57
120
125
Average
U
(m/sec)
0.9
1.5
0.6
(i.e., H x U):
2.5
2.5
1.8
2.0
3.0
(i.e., H x U):
2.5
2.5
1.8
2.0
3.0
3.0
4.5
(i.e., H x U):
4.7
5.7
2.5
2.5
1.8
2.0
3.0
3.0
4.. 5
(i.e., Pnni):
2.5
4.5
4.7
5.7
2.5
2.5
1.8
2.0
3.0
3.0
4.5
(i.e., H x U):
H x U
(m /sec)
31.5
313.5
31.2
125.4
310.0
627.5
88.2
558.0
171.0
350.9
310.0
627.5
88.2
558.0
171.0
360.0
562.5
382.5
1574.5
1749.9
310.0
627.5
88.2
558.0
171.0
360.0
562.5
666.8
365.0
1057.5
1574.5
1749.9
310.0
627.5
88.2
558.0
171.0
360.0
562.5
674.9
Limits
HL UL No.
250 2.0 1
500 4.0 2
750 4.0 1
500 6.0 2
500 6.0 1
500 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-44
-------
PITTSBURGH, PENNSYLVANIA (PIT) JANUARY 1, I960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/02/62
02
03
12/01/62
01
02
02
03
12/01/62
01
02
02
03
03
i)4_
11/30/62
30
12/01/62
01
02
02
03
03
04
11/30/62
30
12/01/62
01
02
02
03
03
04
04
05
H
(m)
41
453
36
Average
34
335
41
453
36
Average
34
335
41
453
36
332
62
Average
55
505
34
335
-41
453
36
332
67
Average
55
505
34
335
41
453
36
332
67
790
142
Average
U
(m/sec)
0.0
1.0
0.3
(i.e.-, H x U):
0.0
2.7
0.0
1.0
0.3
(i.e., ynnj):
0.0
2.7
0.0
1.0
0.3
3.3
U9
(i.e., H~TU):
0.7
3.3
0.0
2.7
0.0
1.0
0.3
3.3
1.9
(i.e., H~TU):
0.7
3.3
0.0
2.7
0.0
1.0
0.3
3.3
1.9
5.0
0.7
(i.e., H x U):
H x U
(m2/sec)
4.1
453.0
10.8
156.0
3.4
904.5
4.1
453.0
10.8
275.2
3.4
904.5
4.1
453.0
10.8
1095.6
127J
371.2
38.5
1666.5
3.4
904.5
4.1
453.0
10.8
-1095.6
127.3
478.2
38.5
1666.5
3.4
904.5
4.1
453.0
10.8
1095.6
127.3
3950.0
99.4
759.4
Limits
HL UL No.
250 4.0 1
500 2.0 2
500 4.0 1
500 4.0 1
750 4.0 1
750 8.0 1
1000 6.0 1
H = Mixing he;dht.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-45
-------
PORTLAND, MAINE (PWM) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days :
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Oate
Mo/Da/Yr
10/20/63
20
21
11/29/62
29
30
30
12/01/62
11/28/62
28
29
29
30
30
12/01/62
11/28/62
28
29
29
30
30
12/01/62
01
02
11/28/62
28
29
29
30
30
12/01/62
01
02
02
03
H
(m)
63
213
76
Average
70
369
46
280
40
Average
47
511
70
369
46
280
40
Average
47
511
70
369
46
280
40
564
224
Average
47
511
70
369
46
280
40
564
224
347
151
Average
U
(m/sec)
1.9
4.0
2.5
(i.e., H x U):
2.5
2.3
2.2
2.5
1.8
(i.e., H x U):
2.7
3.0
2.5
2.3
2.2
2.5
1.8
(i.e., H~x" D).:
2.7
3.0
2.5
2.3
2.. 2
2.5
1.8
5.3
3.0
(i.e. , H x U):
2.7
3.0
2.5
2.3
2.2
2.5
1.8
5.3
3.0
3.0
4.5
(i.e., H x U):
H x U
(m2/sec)
119.7
852.0
190.0
387.2
175.0
848.7
101.2
700.0
72.0
379.4
129.6
1533.0
175.0
848.7
101.2
700.0
72.0
508.5
129.6
1533.0
175.0
848.7
101.2
700.0
72.0
2989.2
672.0
802.3
129.6
1533.0
175.0
848.7
101.2
700.0
72.0
2989.2
672.0
1041.0
679.5
812.8
Limits
HL UL No.
500 2.0 1
250 4.0 2
500 4.0 1
750 4.0 1
750 6.0 1
750 6.0 1
H = Mixing height.
U = Wind speed averaged through H. _, „ , ,
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-46
-------
RAPID CITY, SOUTH DAKOTA (RAP) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
12/11/60
11
12
12/10/60
11
11
12
12
12/10/60
11
11
12
12
13
13
12/08/60
09
09
10
10
11
11
12
12
12/08/60
09
09
10
10
11
11
12
12
13
13
H
(m)
40
103
42
Average
22
40
103
42
131
Average
22
40
103
42
131
45
75
Average
38
50
182
102
22
40
103
42
131
Average
38
50
182
102
22
40
103
42
131
45
75
•Average
U
(m/sec)
0.8
0.9
0.9
(i.e., H x U):
3.4
0.8
0.9
0.9
1.2
(i.e., H x U):
3.4
0.8
0.9
0.9
1.2
3.8
1.2
(i.e., H x U):
3.9
1.4
-1-.5
3.7
3.4
0.8
0.9
0.9
1.2
(i.e. , H x U):
3.9
1.4
1.5
3.7
3.4
0.8
0.9
0.9
1.2
3.8
1.2
(i.e., H x U):
H x U
(m2/sec)
32.0
92.7
37.8
54.2
74.8
32.0
92.7
37.8
157.2
78.9
74.8
32.0
92.7
37.8
157.2
171.0
90.0
93.6
148.2
70.0
273.0
377.4
74.8
32.0
92.7
37.8
157.2
140.3
148.2
70.0
273.0
377.4
74.8
32.0
92.7
37.8
157.2
171.0
90.0
138.6
Li m' ts
HL UL No .
250 2.0 2
250 4.0 5
250 4.0 2
!
250 4.0 1
250 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H "X U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number o^ episodes with these Limits.
B-47
-------
ST. CLOUD, MINNESOTA (STC) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Jtog-
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnc[
Date
Mo/Da/Yr
02/07/62
07
08
01/04/64
04
05
05
06
01/10/61
10
11
11
12
12
13
11/11/60
12
12
13
13
14
14
15
15
01/08/61
08
09
09
10
10
11
11
12
12
13
H
(m)
53
130'
73
Average
73
239
154
64
235
Average
42
222
79
324
58
388
132
Average
57
284
372
279
318
228
343
13&
107
Average
225
430
274
446
42
222
79
324
58
388
132
Average
U
(m/sec)
1.3
3.5
0.0
(i.e., H x U):
4.1
5.0
3.0
3.6
2.5
(i.e., H x U):
1.5
3.5
1.0
5.3
1.0
5.0
2.8
(i.e., H x U):
3.6
5.0
0,7
4.0
5.3
4.0
2.3
2,1
5.0
(i.e. , H x U):
4.5
4.0
7.0
6.3
1.5
3.5
1.0
5.3
1.0
5.0
2.8
(i.e., H x U):
H x U
(m2/sec)
68.9
455.0
7.3
177.1
299.3
1195.0
462.0
230.4
587.5
554.8
63.0
777.0
79.0
1717.2
58.0
1940.0
89.6
674.8
205.2
1420.0
260.4
1116.0
1685.4
912.0
788.9
289.8
535.0
801.4
1012.5
1720.0
1918.0
2809.8
63.0
777.0
79.0
1717.2
58.0
1940.0
89.6
1107.6
Limits
HL UL No.
250 4.0 7
500 2.0 4
250 6.0 1
500 6.0 3
500 6.0 1
500 8.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-48
-------
SALEM, OREGON (SLE) JANUARY 1, I960—DF~EMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
01/28/62
28
29
12/12/63
12
13
13
14
03/19/60
19
20
20
21
21
22
03/19/60
19
20
20
21
21
22
22
23
01/28/62
28
29
29
30
30
31
31
02/01/62
01
02
H
(m)
104
117
72
Average
142
207
127
199
179 .
Average
30
586
32
621
27
581
41
Average
30
586
32
621
27
581
41
482
148
Average
104
117
72
391
102
227
80
356
63
234
47
Average
U
(m/sec)
0.8
1.5
O.D
(i.e., FT
0.9
1.5
1.2
1.5
2.5
(i.e., H x
0.6
1.3
0.8
1.5
0.0
1.0
0.0
(i.e., H x
0.6
1.3
0.8
1.5
0.0
1.0
o.o
2.0
1..2
(i.e. , H~x~
0.8
1.5
0.0
3.3
2.8
1.0
0.7
2.0
0.8
2.0
23
(i.e., H x
H x U
(m2/sec)
83.2
175.5
2,2
"U): 88.6
127.8
310.5
152.4
298.5
44.7,5
u); 267.2
18.0
761.8
25.6
931.5
2.7
581.0
4.1
U): 332.1
18.0
761.8
25.6
931.5
2.7
581.0
4.1
964.0
177.6
U): 385.1
83.2
175.5
7.2
1290.3
285.6
227.0
56.0
712.0
50.4
468.0
131.6
U): 317.0
Limits
HL UL No.
250 2.0 3
250 4.0 1
500 2.0 1
750 2.0 1
250 6.0 1
750 2.0 1
500 4.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-49
-------
SALT LAKE CITY, UTAH (SLC) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Ca/Yr
01/24/60
24
25
01/27/62
27
28
28
29
02/03/62
03
04
04
05
05
-Q6
02/02/62
02
03
03
04
04
C5
05
06
01/06/61
06
07
07
08
08
09
09
10
10
11
H
(m)
117
223
149
Average
64
99
207
201
170
Average
137
200
140
196
157
168
. 188_
Average
184
237
137
200
•140
196
157
168
188
Average
59
458
85
498
66
431
43
187
69
370
35
Average
U
(m/sec)
0.4
1.0
0.2
(i.e., H~x~1T):
2.2
1.6
1.5
2.0
1.0
(i.e., H x U):
1.8
1.5
2.1
1.5
2.0
2.0
2.5
(i.e., HTU):
2.0
2.5
1.8
1.5
2.1
1.5
2.0
2.0
2.5
(i.e. , H x U):
2.4
1.3
2.6
1.9
2.5
2.3
1.9
3.5
2.3
3.0
3.8
(i.e., H~x~U):
H x U
(m2/sec)
46.8
223.0
29.8
99.9
140.8
158.4
310.5
402.0
170.0
236.3.
246.6
300.0
294.0
294.0
314.0
336.0
•470.0
322.1
368.0
592.5
246.6
300.0
294.0
294.0
314.0
336.0
470.0
357.2
141.6
595.4
221.0
846.6
165.0
991.3
81.7
654.5
158.7
1110. 0
133.0
463.5
Limits
HL UL No.
250 2.0 4
250 4.0 3
500 2.0 1
250 4.0 1
250 4.0 1
500 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-50
-------
SAN ANTONIO, TEXAS (SAT) JANUARY 1, 1960—DECEMBER 31,1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng.
Date
Mo/Da/Yr
12/06/63
06
07
12/16/62
16
17
17
18
12/19/64
19
20
20
21
21
22
12/31/60
01/01/61
01
02
02
03
03
04
04
12/19/64
19
20
20
21
21
22
22
23
23
24
H
(m)
66
246
226
Average
67
515
47
273
301
/werayi.
567
675
231
515
77
884
87
Average
745
381
539
339
581
343
653
560
514
Average
567
675
231
515
77
884
87
558
295
525
43
Average
U
(m/sec)
2.2
3.5
5.5
(i.e., H x U):
3.1
3.3
3.3
3.0
5.3
^ ,.*.., ii"TU):
3.1
3.0
5.5
3.0
0.9
3.0
1.6
(i.e., H x U):
6.7
4.3
2.7
7.7
6.0
8.0
5.3
4-7
4.3
(i.e. , H x U):
3.1
3.0
5.5
3.0
0.9
3.0
1.6
6.3
3.0
5.0
1.9
(i.e., H x U):
H x U
(m2/sec)
145.2
861.0
1243.0
749.7
207.7
1699.5
155.1
819.0
1595.3
895.3
1757.7
2025.0
1270.5
1545.0
69.3
2652.0
139.2
1351.2
4991.5
1638.3
1455.3
2610.3
3486.0
2744.0
3460.9
'2632.0
2210.2
2803.2
1757.5
2025.0
1270.5
1545.0
69.3
2652.0
139.2
3515.4
885.0
2625.0
81.7
1506.0
Limits
HL UL No.
250 6.0 1
750 6.0 2
750 8.0 1
1000 6.0 5
1500 4.0 1
1000 6.0 1
750 8.0 1
1000 8.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-51
-------
SAN DIEGO, CALIFORNIA (SAN) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/06/61
06
07
12/18/60
18
19
19
20
09/24/60
24
25
25
26
26
27
12/30/61
30
31
31
01/01/62
01
02
02
03
07/14/61
14
15
15
16
16
17
17
18
18
19
H
(m)
63
167
83
Average
50
185
31
126
30
Average
185
230
74
121
172
209
103
Average
34
136
34
112
63
256
257
400
388
Average
422
405
451
429
404
390
403
387
252
354
279
Average
U
(m/sec)
0.3
1.5
1.4
(i.e., H~x"Tf):
0.3
3.0
0.4
3.4
0.4
(i.e., H x U):
2.0
3.0
0.6
3.1
1.0
4.0
2.1
(i.e., H x U):
1.8
3.5
2.9
2.9
1.5
3.5
1.0
2.7
3.0
(i.e., H x U):
2.0
2.7
1.7
3.3
0.7
3.7
1.7
4.0
2.0
2.7
1.5
(i.e., H x U):
H x U
(m2/sec)
18.9
250.5
116.2
128.5
15.0
555.0
12.4
428.4
12.0
204.6
370.0
690.0
44.4
375.1
172.0
836.0
216.3
386.3
61.2
476.0
98.6
324.8
94.5
896.0
257.0
T080.0
1164.0
494.7
844.0
1093.5
766.7
1415.7
282.8
1443.0
685.1
1548.0
504.0
955.8
418.5
905.2
Limits
HL UL No.
250 2.0 2
250 4.0 5
250 4.0 1
500 4.0 8
500 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H'x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-52
-------
SANTA MONICA, CALIFORNIA (SMO) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration Time
1 Day: Mrng
Aftn
Mrng
2 Days: Mrng
Aftn
Mrng
Aftn
Mrng
3 Days: Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
4 Days : Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
5 Days: Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Date
Mo/Da/Yr
02/02/62
02
03
11/20/60
20
21
21
22
12/25/60
25
26
26
27
27
28
12/20/61
20
21
21
22
22
23
23
24
07/17/60
17
18
18
19
19
20
20
21
21
22
H
(m)
56
97
221
Average
52
119
4
78
66
Average
33
155
12
288
54
346
39
Average
93
118
327
141
278
278
37
82-
36
Average
241
266
321
321
257
267
62
192
342
464
304
Average
U
(m/sec)
1.0
3.1
0.0
(i.e., H x U):
1.8
.3.8
0.8
3.7
1.3
(i.e., H x U):
1.3
3.5
2.0
3.0
3.1
2.0
0.6
(i.e., H x U):
0.5
2.9
1.7
1.3
0.5
4.0
1.8
3.6
0..8
(i.e., H x U):
2.5
3.5
1.3
3.0
3.0
3.5
1.6
3.5
2.7
3.0
2.0
(i.e., H x U):
H x U
(m2/sec)
56.0
300.7
22.1
126.3
93.6
452.2
3.2
288.6
85.8
184.7
42.9
542.5
24.0
864.0
167.4
692.0
23.4
336.6
46.5
342.2
555.9
183.3
139.0
1112.0
66.6
295.2
28.8
307.7
602.5
931.0
417.3
963.0
771.0
934.5
99.2
672.0
923.4
1392.0
608.0
755.8
Limits
HL UL NO.
250 4.0 14
500 2.0 5
250 4.0 1
500 4.0 8
250 8.0 1
500 4.0 2
500 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of I! and U used to define episodes.
No. = Total number of episodes with these Limits.
B-53
-------
SAULT SAINTE MARIE, MICHIGAN (SSM) JANUARY 1, 1960--DECEMBER 31, 1961
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrna
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
01/01/63
01
02
11/30/62
12/01/62
01
02
02
12/03/64
03
04
04
05
05
06
02/01/61
01
02
02
03
03
04
04
05
03/22/62
23
23
24
24
25
25
26
26
27
27
H
(m)
292
413
103
Average
133
101
227
130
239
Average
305
365
307
349
334
413
132
Average
878
510
337
753
.372
454
155
3-78
128
Average
708
220
1348
142
650
64
642
89
1008
124
423
•Average
U
(m/sec)
1.5
1.0
1.2
(i.e., H x U):
2.1
2.1
3.0
2.3
3.0
(i.e., H x U):
3.3
4.3
7.7
7.7
7.0
4.3
1.0
(i.e., H x U):
3.8
4.3
3-. 3
2.3
5.7
4.3
3.5
A. 3
1.0
(i.e. , H x U):
2.3
3.5
2.4
2.0
6.7
1.8
4.3
2.1
4.0
1.2
5.7
(i.e. , H x U):
H x U
(m2/sec)
438.0
413.0
123.6
324.8
279.3
212.1
681.0
299.0
717.0
437.7
1006.5
1569.5
2363.9
2687.3
2338.0
1775.9
132.0
1696.2
3336.4
2193.0
1112.1
1731.9
2120.4
1952.2
542.5
-1625.4
128.0
1638.0
1628.4
770.0
3235.2
284.0
4355.0
115.2
2760.6
186.9
4032.0
148.8
2411.1
1811.6
Limits
HL UL No.
500 2.0 1
250 4.0 1
250 4.0 1
500 8.0 1
1000 6.0 1
1500 8.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episoH^s with these Limits.
B-54
-------
SEATTLE, WASHINGTON (SEA) JANUARY 1, 1959--DECEMBER 31, 1961
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days :
Time
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrna
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
12/20/60
21
21
12/08/60
08
09
09
10
12/07/60
07
08
08
09
09 •
10
12/06/60
06
07
07
08
08
09
09
10
12/05/60
05
06
06
07
07
08
08
09
09
10
H
(m)
162
158
158
Average
68
68
34
104
72
Average
169
201
68
68
34
104
72
Average
81
389
169
201
•68
68
34
104
72
Average
391
391
81
389
169
201
68
68
34
104
72
Average
U
(m/sec)
2.0
2.0
2.0
(i.e., H x U):
3.1
3.1
2.7
3.1
2.7
(i.e., H x U):
4.0
5.0
3.1
3.1
2.7
3.1
2.7
(i.e., H x U):
2.4
4.3
4:0
5.0
3.1
3.1
2.7
3.1
2.7
(i.e. , H x U):
1.3
3.7
2.4
4.3
4.0
5.0
3.1
3.1
2.7
3.1
2.7
(i.e., H x U):
H x U
(m2/sec)
324.0
316.0
316.0
318.7
210.8
210.8
91.8
322.4
194.4
206.1
676.0
1005.0
210.8
210.8
91.8
322.4
194.4
387.3
162.0
1672.7
676.0
1005.0
210.8
210.8
91.8
-322.4
194.4
505.1
508.3
1446.7
162.0
1672.7
676.0
1005.0
210.8
210.8
91.8
322.4
194.4
590.99
Limits
HL UL No.
250 2.0 1
250 4.0 2
250 6.0 1
500 6.0 2
500 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episo^s with these Limits.
-------
SHREVEPORT, LOUISIANA (SHV) JANUARY!, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Afln
Mrng
Date
Mo/Da/Yr
12/16/62
16
17
01/22/60
22
23
23
24
01/22/60
22
23
23
24
24
25
10/01/63
01
02
02
03
03
04
04
£5
12/27/63
27
28
28
29
29
30
30
31
31
01/01/64
H
(tn)
66
148
113
Average (i.
115
248
628
409
424
Average (i.
115
248
628
409
424
947
61
Average (i.
97
1486
70
1457
•55
1416
81
1911
91
Average (i.
51
658
183
421
79
554
882
835
380
907
92
Average (i.
U
(m/sec)
1.2
2.5
1.2
e., H x
2.6
3.0
4.0
3.3
2.0
e., H x
2.6
3.0
4.0
3.3
2.0
2.0
1.4
e., H x
1.9
3.2
r.o
1.6
2.8
1.8
2.5
2-. 2
_2^_
e. , TTT
4.4
1.7
3.5
4.3
2.4
7.3
7.7
5.7
6.0
3.3
1.6
e., H x
H x U
(m2/sec)
79.2
370.0
135.6
U): 194.9
299.0
774.0
2512.0
1349.7
848.0
U): 1156.5
299.0
774.0
2512.0
1349.7
848.0
1894.0
85.4
U); 1108.9
184.3
4755.2
70.0
2331.2
154.0
2548.8
202.5
4204.5
_25_4^S
~U): 1633.9
224.4
1118.6
640.5
1810.3
189.6
4044.2
6791.4
4759.5
2280.0
2993.1
147.2
U): 2272.6
Limits
HL UL No.
250 4.0 1
750 4.0 1
1000 4.0 1
2000 4.0 2
1000 8.0 3
1000 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episo^s with these Limits.
B-56
-------
SPOKANE, WASHINGTON (GEG) JANUARY 1, 1960— DECEMBER 31, 1961
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng__
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng_
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Date
Mo/Da/Yr
12/05/60
05
06
02/02/64
02
03
03
04
11/28/63
28
29
29
30
30
12/01/63
11/06/61
06
07
07
08
08
09
09
10
11/28/63
29
29
30
30
12/01/63
01
02
02
03
03
H
(m)
83
104
182
Average
55
70
144
214
80
Average
154
174
137
244
88
244
156
Average
83
460
145
277
121
316
61
264
72
Average
174
137
244.
88
239
156
285
117
217
122
215
Average
U
(m/sec)
1.6
2.0
1.5
(i.e., H x U):
2.1
2.4
0.0
2.5
• 0.8
(i.e., H x U):
3.0
2.5
2.6
3.5
1.9
3.5
2.5
(i.e., H x U):
1.2
1.7
1-.8
2.0
2.5
2.0
1.4
2.. 5
3.6
(i.e. , H x U):
2.5
2.6
3.5
1.9
2.0
2.5
3.0
2.1
2.5
1.0
2.0
(i.e., H x U):
H x U
(m2/sec)
132.8
208.0
273.0
204.6
115.5
168.0
14.4
535.0
64.0
178.6
462.0
435.0
356.2
854.0
167.2
478.0
390.0
448.9
99.6
782.0
261.0
554.0
302.5
632.0
85.4
660.0
259.2
426.2
435.0
356.2
854.0
167.2
478.0
390.0
855.0
245.7
542.5
122.0
430.0
443.2
Limits
HL UL No.
250 2.0 1
250 4.0 4
250 4.0 1
500 4.0 3
500 4.0 2
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-57
-------
TAMPA, FLORIDA (TPA) JANUARY 1, 1960--DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Nrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
03/12/64
12
13
02/15/62
15
16
16
17
12/16/62
16
17
17
18
18
19
02/13/62
13
14
14
15
15
16
16
17
12/16/62
16
17
17
18
18
19
19
20
20
21
H
(m)
131
168
112
Average
413
478
112
287
362
Average
83
399
166
1267
150
1102
117
Average
343
692
534
572
413
478
112
287
362
Average
83
399
166
1267
150
1102
117
984
71
1030
67
Average
u
(m/sec)
2.7
4.0
3.8
(i.e., FTU):
4.5
4.0
3.1
6.0
3.7
(i.e., H x U):
3.3
3.0
3.0
1.6
3.5
3.6
2.8
(i.e., H x U):
6.7
5.0
6.0
7.5
4.5
4.0
3.1
6.0
3.7
(i.e. , H x U):
3.3
3.0
3.0
1.6
3.5
3.6
2.8
4.3
3.3
3.8
2.9
(i.e., H x U):
H x U
(m2/sec)
353.7
672.0
425.6
483.8
1858.5
1912.0
347.2
1722.0
1339.4
1435.8
273.9
1197.0
498.0
2027.2
525.0
3967.2
327.6
1259.4
2298.1
3460.0
3204.0
4290.0
1858.5
1912.0
347.2
1722.0
1339.4
2270.1
273.9
1197.0
498.0
2027.2
525.0
3967.2
327.6
4231.2
234.3
3914.0
194.3
1580.9
Limits
HL UL No.
250 4.0 1
500 6.0 1
1500 4.0 3
1000 6.0 1
750 8.0 1
1500 4.0 1
750 8.0 1
1500 6.0 10
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x I), values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-58
-------
TOPEKA, KANSAS (TOP) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
05/30/62
30
31
01/15/63
15
16
16
_17
01/30/60
30
31
31
02/01/60
01
02
01/27/62
27
28
28
29
29
30
30
31
08/03/61
03
04
04
05
05
06
06
07
07
08
H
(m)
112
245
172
Average (i
156
380
100
316
_. I3.2. _
Average ( i
278
405
105
287
135
218
306
Average (i
315
378
192
360
•66
293
195
40
.4.78
Average (i
739
1496
270
1306
122
203
257
1445
104
1679
122
Average (i
U
(m/sec)
1.2
6.0
4.5
.e., H x
5.0
2.7
1.3
4.7
_3J_
.e., H x
4.5
6.0
3.3
3.0
1.5
6.0
5.3
.e., H x
5.0
3.7
5.5
6.3
3.1
5.5
6.5
7.0
5.7
.e., H~3T
2.5
4.2
3.5
3.6
4.7
7.0
2.0
4.4
0.8
3.2
1.8
.e., H x
H x U
(m2/sec)
134.4
1470.0
774.0
U): 792.8
780.0
1026.0
130.0
1485.2
409._2_
U): 766.1
1251.0
2430.0
346.5
861.0
202.5
1308.0
1621.8
U): 1145.8
1575.0
1398.6
1056.0
2268.0
204.6
1611.5
1267.5
• 280.0
2724.6
TJ): 1376.2
1847.5
6283.2
945.0
4701.6
573.4
1421.0
514.0
6358.0
83.2
5372.8
219.6
U): 2574.5
Limits
HL UL No.
250 6.0 1
500 6.0 5
500 6.0 1
500 8.0 1
2000 8.0 4
H = Mixing height.
U = Wind speed averaged throuqh H.
In calculations of H x Upvalues of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-59
-------
TUCSON, ARIZONA (TUS) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Date
Mo/Da/Yr
12/12/62
12
13
12/11/62
11
12
12
13
12/28/61
28
29
29
30
30
31
12/27/61
27
28
28
29
29
30
30
31
11/26/61
26
27
27
28
28
29
29
30
30
12/01/61
H
(m)
156
211
74
Average
66
333
156
211
74
Average
88
927
66
831
60
651
69
Average
99
827
88
927
66
831
60
651
69
Average
83
604
57
439
117
609
79
563
74
525
115
Average
U
(m/sec)
3.0
3.5
3.5
(i.e., H x U):
4.5
2.0
3.0
3.5
3.5
(i.e., H x U):
3.3
2.5
3.8
3.3
4.0
3.3
3.5
(i.e., H x U):
3.5
2.5
3.3
2.5
3.8
3.3
4.0
3.3
3.5
(i.e. , H x U):
3.1
3.0
3.4
2.3
3.3
2.0
5.3
2.3
3.4
2.0
4.6
(i.e., H x U):
H x U
(m2/sec)
468.0
738.5
259.0
488.5
297.0
666.0
468.0
738.5
259.0
485.7
290.4
2317.5
250.8
2742.3
240.0
2148.3
241.5
1175.8
346.5
2067.5
290.4
2317.5
250.8
2742.3
240.0
2148.3
241.5
1182.7
257.3
1812.0
193.8
1009.7
386.1
1218.0
418.7
1294.9
251.6
1050.0
529.0
765.6
Limits
HL UL No.
250 4.0 1
750 4.0 1
500 6.0 1
1000 4.0 1
1000 4.0 1
750 6.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-60
-------
WASHINGTON, D.C. (DIA) JANUARY 1,1961— DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrnq
Date
Mo/Da/Yr
12/02/61
02
03
01/05/63
05
06
06
07
01/05/63
05
06
06
07
07
08
12/01/62
Oi
02
02
03
03
04
04
05
10/08/61
OB
0?
09
10
10
11
11
12
12
13
H
(m)
53
116
94
Average
27
324
64
330
75
Average
27
324
64
330
75
575
49
Average
64
734
28
b77
101
569
84
460
12';
Average
97
•|C71
92
16,71'
61
1802
73
1542
131
384
156
Average
U
(m/sec)
1.2
2.5
1.0
(i.e., innj):
0.0
3.0
0.0
3.0
0.0
(i.e., H x U):
0.0
3.0
0.0
3.0
0.0
1.3
0.0
(i.e., iTx~U):
2.3
6.3
2.7
5.3
2.7
3.3
3.4
3.7
4.1
(i.e., MTU):
1.6
2. A
1.3
2.2
0.9
1.6
1.1
3.8
2.4
1.3
1.5
(i.e., H x U):
H x U
(m2/sec)
63.6
290.0
94.0
149.2
2.7
972.0
6.4
990.0
7.5
395.7
2.7
972.0
6.4
990.0
7.5
747.5
4.9
390.1
147.2
4624.2
75.6
3588.1
272.7
1E77.7
285.6
1702.0
496.1
1^52.1
155.2
4010.4
119.6
3676.2
54.9
2683.2
80.3
5859.6
314.4
1149.2
234.0
;685.2
Limits
HL UL No.
500 2.0 1
250 4.0 2
500 4.0 1
750 4.0 1
750 3.0 1
2000 4.0 1
1000 8.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-61
-------
WINNEMUCCA, NEVADA (WMC) JANUARY 1, 1960—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
02/05/62
05
06
02/04/62
04
05
05
06
01/30/62
30
31
51
02/01/62
01
02 .
01/30/62
30
31
31
02/01/62
01
02
02
03
02/02/62
02
03
03
04
04
05
05
06
06
07
H
(m)
48
351
58
Average
62
324
48
351
58
Average
b9
401
27
448
42
593
40
Average
59
401
27
448
42
593
40
484
49
Average
40
484
49
356
62
324
48
351
58
339
79
Average
U
(m/sec)
0.6
0.0
0.7
(i.e., H x U):
0.5
0.3
0.6
0.0
0.7
(i.e., THTU):
0.0
0.7
0.7
2.0
0.4
0.3
1.0
(i.e., H x U):
0.0
0.7
0.7
2.0
0.4
0.3
1.0
1.3
0.4
(i.e., iTxT):
1.0
1.3
0.4
2.3
0.5
0.3
0.6
0.0
0.7
2.0
2.C
(i.e., H x U):
H x U
(m2/sec)
28. S
35.1
40.6
34.8
31.0
97.2
23.8
35.1
40.6
46.5
5.9
280.7
18.9
896.0
16.8
177.9
40.0
205.2
5.9
280.7
18.9
896.0
16.8
177.9
40.0
629.2
19.6
231.7
40.0
629.2
19.6
818.8
31.0
97.2
28.8
35.1
40.6
1017.0
205.4
269.3
Limits
HL UL No.
500 2.0 14
250 4.0 3
500 2.0 3
750 2.0 4
750 2.0 2
500 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-62
-------
WINSLOW, ARIZONA (INW) JANUARY 1, 1962—DECEMBER 31, 1964
Episode
Duration
1 Day:
2 Days:
3 Days:
4 Days:
5 Days:
Time
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrnq
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Aftn
Mrng
Date
Mo/Da/Yr
01/26/62
26
27
01/26/62
26
27
27
28
01/05/62
05
06
06
07
07
08
01/05/62
05
06
06
07
07
08
08
09
01/26/62
26
27
27
28
28
29
29
30
30
31
H
(m)
44
130
52
Average (i
44
130
52
178
S7
Average (i
44
178
42
186
71
206
30
Average (i
44
178
42
186
71
206
30
195
_51
Average (i
44
130
52
178
57
229
265
213
341
297
486
Average (i
U
(m/sec)
3.5
2.1
1.8
.e., FTU):
3.5
2.1
1.8
3.0
• 1.5
.e., H x U):
1.9
3.5
1.9
3.5
2.0
2.5
2.0
.e., H x U):
1.9
3.5
1.9
3.5
2.0
2.5
2.0
4.0
_D^3
.e., fiTTJ):
3.5
2.1
1.8
3.0
1.5
3.5
2.0
1.1
1.0
1.8
2.2
.e., H x U):
H x U
(m2/sec)
154.0
273.0
93.6
173.5
154.0
273.0
93.6
534.0
85.5
228.0
83.6
623.0
79.8
651.0
142.0
515.0
60.0
307.8
83.6
623.0
79.8
651.0
142.0
515.0
60.0
780.0
L5J
327.7
154.0
273.0
93.6
534.0
85.5
801.5
530.0
234.3
341.0
534.6
1069.2
422.8
Limits
HL UL No.
500 2.0 7
250 4.0 4
250 4.0 2
500 2.0 2
250 4.0 1
250 4.0 1
500 4.0 1
H = Mixing height.
U = Wind speed averaged through H.
In calculations of H x U, values of U = 0.0 m/sec are treated as 0.1 m/sec.
Limits = Limiting values of H and U used to define episodes.
No. = Total number of episodes with these Limits.
B-63
-------
-------
TECHNICAL REPORT DATA
(Please read Instructions on the reverse before completing)
\ REPORT NO.
EPA-650/4-74-002
3. RECIPIENT'S ACCESSION-NO.
4 TITLE ANDSUBTITLE
Meteorological Episodes of Slowest Dilution
in Contiguous United States
5. REPORT DATE
Fohviiavw 1Q7A
8f
6. PERFORMING ORGANIZATION CODE
400942FDD1
7 AUTHOR(S)
George C. Holzworth
8. PERFORMING ORGANIZATION REPORT NO.
9. PERFORMING ORGANIZATION NAME AND ADDRESS
Environmental Protection Agency
Meteorology Laboratory/NERC
NCHS - Building C
Research Triangle Park. N.C. 27711
10. PROGRAM ELEMENT NO.
1AAQ09
11. CONTRACT/GRANT NO.
12. SPONSORING AGENCY NAME AND ADDRESS
13. TYPE OF REPORT AND PERIOD COVERED
Final
14. SPONSORING AGENCY CODE
15. SUPPLEMENTARY NOTES
16. ABSTRACT
Five years of mixing height and wind speed data have been analyzed to determine
the episodes of slowest dilution lasting 1, 2, 3, 4, and 5 days at each of 62
weather stations. Dates and meteorological data are given for each episode,
the stations are ranked by their values on a slowest dilution parameter, the
monthly variation of episodes is summarized, and maps are presented showing
isopleths of slowest dilution values. This information should be of interest
to those involved in modeling and appraising atmospheric transport and diffu-
sion during episodes of extremely slow dilution.
KEY WORDS AND DOCUMENT ANALYSIS
DESCRIPTORS
b.IDENTIFIERS/OPEN ENDED TERMS C. COS AT I Field/Group
Meteorological episodes,
Slowest dilution,
Mixing heights,
Wind speeds,
Limited dilution
3 DISTRIBUTION STATEMENT
Document available through National
Technical Information Service, Spring-
field. Virginia 22151
19. SECURITY CLASS (ThisReport)
Unclassified
21 NO. OF PAGES
84
20 SECURITY CLASS (This page)
llnrlassi fieri
22. PRICE
EPA Form 2220-1 (9-73)
C-1
-------
-------
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