2001 TULSA, OKLAHOMA (TUL)



The city of Tulsa lies along the Arkansas River at an elevation of 700 feet above sea level. The surrounding terrain is gently rolling.

At latitude 36 degrees, Tulsa is far enough north to escape the long periods of heat in summer, yet far enough south to miss the extreme cold of winter. The influence of warm moist air from the Gulf of Mexico is often noted, due to the high humidity, but the climate is essentially continental characterized by rapid changes in temperature. Generally the winter months are mild. Temperatures occasionally fall below zero but only last a very short time. Temperatures of 100 degrees or higher are often experienced from late July to early September, but are usually accompanied by low relative humidity and a good southerly breeze. The fall season is long with a great number of pleasant, sunny days and cool, bracing nights.

Rainfall is ample for most agricultural pursuits and is distributed favorably throughout the year. Spring is the wettest season, having an abundance of rain in the form of showers and thunderstorms.

The steady rains of fall are a contrast to the spring and summer showers and provide a good supply of moisture and more ideal conditions for the growth of winter grains and pastures. The greatest amounts of snow are received in January and early March. The snow is usually light and only remains on the ground for brief periods.

The average date of the last 32 degree temperature occurrence is late March and the average date of the first 32 degree occurrence is early November. The average growing season is 216 days.

The Tulsa area is occasionally subjected to large hail and violent windstorms which occur mostly during spring and early summer, although occurrences have been noted throughout the year.

Prevailing surface winds are southerly during most of the year. Heavy fogs are infrequent. Sunshine is abundant. The prevalence of good flying weather throughout the year has contributed to the development of Tulsa as an aviation center.

NORMALS, MEANS, AND EXTREMES

TULSA, OK (TUL)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 13968

36 11′ 51″ N  95 53′ 11″ W  GRND:  739  BARO: � A0;742  CENTRAL (UTC + 6)

2001 Tulsa, Oklahoma (TUL)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 45.4 51.0 62.1 73.0 79.7 87.7 93.7 92.5 83.6 73.8 60.3 48.8 71.0
MEAN DAILY MAXIMUM 65 46.7 52.4 61.0 72.1 79.3 87.4 93.3 92.8 84.6 74.7 60.2 50.1 71.2
HIGHEST DAILY MAXIMUM 62 79 90 96 102 96 103 112 110 109 98 87 80 112
YEAR OF OCCURRENCE 1950 1996 1974 1972 1985 1953 1954 1970 1939 1979 1945 1966 JUL 1954
MEAN OF EXTREME MAXS. 53 68.7 74.5 83.0 88.0 90.7 96.1 102.0 102.0 96.7 89.4 78.5 71.0 86.7
NORMAL DAILY MINIMUM 30 24.9 29.5 39.1 49.9 58.8 67.7 72.8 70.6 63.0 50.7 39.5 28.9 49.6
MEAN DAILY MINIMUM 65 26.4 30.7 38.5 49.6 58.7 67.5 72.2 70.5 62.3 50.9 38.6 30.0 49.7
LOWEST DAILY MINIMUM 62 -8 -11 -3 22 35 49 51 52 35 18 10 -8 -11
YEAR OF OCCURRENCE 1947 1996 1948 1957 1961 1954 1971 1988 1984 1993 1976 1989 FEB 1996
MEAN OF EXTREME MINS. 53 6.8 12.4 20.4 33.3 44.4 55.5 62.3 59.5 46.3 34.2 22.3 11.4 34.1
NORMAL DRY BULB 30 35.2 40.3 50.6 61.5 69.3 77.7 83.3 81.5 73.3 62.2 49.9 38.9 60.3
MEAN DRY BULB 65 36.6 41.5 49.9 60.9 69.1 77.5 82.8 81.7 73.4 62.8 49.3 40.0 60.5
MEAN WET BULB 55 32.2 36.5 43.4 52.9 62.3 69.8 72.7 71.2 65.0 54.9 43.6 35.4 53.3
MEAN DEW POINT 55 25.7 29.6 35.7 46.1 58.0 66.1 68.4 66.7 60.3 49.2 37.4 29.1 47.7
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.3 0.8 2.1 13.3 24.0 22.0 9.4 1.6 0.0 0.0 73.5
MAXIMUM 32 30 5.8 2.6 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 3.1 12.0
MINIMUM 32 30 23.9 17.2 8.5 0.5 0.0 0.0 0.0 0.0 0.0 0.3 7.6 20.1 78.1
MINIMUM 0 30 0.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.1
H/C NORMAL HEATING DEG. DAYS 30 924 692 457 151 41 0 0 0 20 144 453 809 3691
NORMAL COOLING DEG. DAYS 30 0 0 11 46 174 381 567 512 269 57 0 0 2017
RH NORMAL (PERCENT) 30 67 65 62 61 69 69 64 64 70 66 67 68 66
HOUR 00 LST 30 72 70 68 68 78 78 72 73 79 75 74 73 73
HOUR 06 LST 30 78 77 76 78 85 86 82 84 86 82 80 79 81
HOUR 12 LST 30 59 57 53 51 58 58 53 53 58 53 57 60 56
HOUR 18 LST 30 58 55 49 48 56 56 49 50 57 55 59 61 54
S PERCENT POSSIBLE SUNSHINE 53 54 55 58 59 59 69 76 74 68 65 56 53 62
W/O MEAN NO. DAYS WITH:
HEAVY FOG(VISBY 1/4 MI) 62 2.1 1.6 0.9 0.2 0.4 0.3 0.2 0.1 0.6 1.1 1.2 1.7 10.4
THUNDERSTORMS 62 0.7 1.3 3.4 6.1 8.7 8.2 5.6 5.9 5.1 3.1 1.6 0.9 50.6
CLOUDINESS MEAN:
SUNRISE-SUNSET (OKTAS) 1 6.4 5.6 5.2 6.0 5.2 2.8 3.2 2.7 5.6 3.5 4.8 4.0 4.6
MIDNIGHT-MIDNIGHT (OKTAS) 1 6.4 5.6 6.4 6.0 4.8 2.4 2.8 2.8 4.0 3.5 4.8 4.8 4.5
MEAN NO. DAYS WITH:
CLEAR 3 5.0 8.3 8.0 9.5 9.7 10.7 13.5 15.0 7.5 10.0 7.0 9.0 113.2
PARTLY CLOUDY 3 3.7 3.3 1.0 1.0 3.7 8.0 6.5 5.0 3.5 3.5 1.0 5.0 45.2
CLOUDY 3 8.3 7.3 8.7 10.5 8.7 3.7 4.0 4.5 4.5 6.5 9.5 7.0 83.2
PR MEAN STATION PRESSURE(IN) 27 29.42 29.37 29.25 29.23 29.20 29.22 29.26 29.28 29.31 29.34 29.34 29.41 29.30
MEAN SEA-LEVEL PRES. (IN) 55 30.15 30.10 29.99 29.95 29.93 29.92 29.96 29.98 30.00 30.05 30.08 30.13 30.02
WINDS MEAN SPEED (MPH) 42 10.3 10.6 11.8 11.8 10.7 9.7 9.3 8.6 8.9 9.6 10.4 10.2 10.2
PREVAIL. DIR (TENS OF DEGS) 28 18 18 18 18 18 18 18 18 18 18 18 18 18
MAXIMUM 2-MINUTE:
SPEED (MPH) 9 37 41 46 55 41 49 51 38 39 38 44 36 55
DIR. (TENS OF DEGS) 18 20 18 34 30 28 19 29 27 35 29 33 34
YEAR OF OCCURRENCE 1996 2000 1997 1993 2001 1998 1993 2001 1999 2001 1998 2000 APR 1993
MAXIMUM 5-SECOND:
SPEED (MPH) 9 47 53 55 63 48 61 55 51 49 46 52 44 63
DIR. (TENS OF DEGS) 19 21 16 34 29 28 19 29 27 30 29 34 34
YEAR OF OCCURRENCE 1996 2000 1997 1993 2001 1998 1993 2001 1999 1994 1998 2000 APR 1993
PRECIPITATION NORMAL (IN) 30 1.54 1.97 3.46 3.72 5.60 4.44 3.09 3.12 4.70 3.66 3.13 2.16 40.59
MAXIMUM MONTHLY (IN) 62 6.65 5.73 11.94 9.23 18.00 11.17 11.39 7.89 18.81 16.51 7.57 8.70 18.81
YEAR OF OCCURRENCE 1949 1985 1973 1947 1943 1948 1994 1997 1971 1941 1946 1984 SEP 1971
MINIMUM MONTHLY (IN) 62 0.00 0.16 0.08 0.34 1.17 0.53 0.03 0.01 T T 0.01 0.10 0.00
YEAR OF OCCURRENCE 1993 1996 1971 1989 1988 1963 1954 2000 1948 1952 1949 1996 JAN 1993
MAXIMUM IN 24 HOURS (IN) 62 2.25 4.34 2.72 4.58 9.27 5.01 7.54 5.37 6.39 5.80 5.14 3.27 9.27
YEAR OF OCCURRENCE 1946 1985 1998 1964 1984 1941 1963 1989 1940 1983 1974 1984 MAY 1984
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 6.1 6.7 8.4 8.8 10.1 8.5 5.9 6.8 8.0 6.5 6.5 6.7 89.0
PRECIPITATION 1.00 30 0.2 0.4 1.1 1.0 1.6 1.3 0.9 1.1 1.5 1.3 1.0 0.6 12.0
SNOWFALL NORMAL (IN) 30 2.8 2.5 1.5 0.* 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.9 9.1
MAXIMUM MONTHLY (IN) 60 12.7 10.1 14.1 1.7 T T T 0.0 T 0.3 5.6 11.4 14.1
YEAR OF OCCURRENCE 1979 1960 1994 1957 1991 1994 1994 1990 1993 1972 2000 MAR 1994
MAXIMUM IN 24 HOURS (IN) 60 9.0 6.5 12.9 1.7 T T T 0.0 T 0.3 4.0 8.8 12.9
YEAR OF OCCURRENCE 1944 1993 1994 1957 1991 1994 1994 1994 1990 1993 1972 1954 MAR 1994
MAXIMUM SNOW DEPTH (IN) 53 11 6 10 T 0 0 0 0 0 0 3 8 11
YEAR OF OCCURRENCE 1988 1949 1968 1993 2001 1954 JAN 1988
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 1.0 0.9 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.8 3.2

2001 Tulsa, Oklahoma (TUL)

PRECIPITATION (inches) 2001 TULSA, OK (TUL)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.17 0.49 0.91 4.45 2.43 2.69 2.68 5.16 2.95 7.58 5.00 1.03 35.54
1973 3.39 0.74 11.94 7.22 5.30 7.69 6.47 4.70 6.56 6.16 6.32 3.39 69.88
1974 0.79 3.17 2.62 3.65 6.94 7.88 0.55 5.30 11.78 6.40 7.30 2.88 59.26
1975 2.61 3.44 5.45 2.20 7.22 6.75 2.14 3.52 3.34 1.47 3.53 3.04 44.71
1976 0.21 0.84 3.95 8.27 6.75 1.87 4.37 1.17 2.60 2.65 0.68 0.55 33.91
1977 1.43 1.57 5.58 2.05 5.72 6.69 2.00 4.86 5.57 2.75 2.31 0.93 41.46
1978 0.81 2.84 2.99 7.14 9.28 6.06 0.36 1.37 0.13 0.95 5.48 0.78 38.19
1979 2.07 0.81 3.97 4.47 6.15 8.90 2.68 4.77 0.28 2.20 5.60 0.45 42.35
1980 2.07 1.32 3.59 3.44 7.23 5.57 0.09 2.34 3.47 2.05 0.79 1.37 33.33
1981 0.69 1.63 1.67 1.90 6.70 3.31 6.22 2.47 3.11 6.73 2.25 0.20 36.88
1982 3.58 0.67 1.04 1.28 9.30 4.13 1.65 1.42 2.95 1.22 4.61 3.39 35.24
1983 2.95 1.98 2.19 3.88 6.85 1.47 0.58 0.65 2.11 9.33 2.14 0.61 34.74
1984 1.00 1.95 6.72 2.44 11.25 1.72 0.48 1.96 2.77 6.98 2.80 8.70 48.77
1985 1.24 5.74 5.39 5.62 4.19 7.63 2.38 1.91 3.29 6.26 6.27 1.39 51.31
1986 0.00 1.22 2.28 5.10 6.97 4.23 1.15 3.96 8.36 5.53 2.99 0.97 42.76
1987 2.21 4.72 2.20 0.70 10.02 2.31 4.20 3.72 3.52 1.27 5.17 5.87 45.91
1988 1.11 1.03 6.52 3.18 1.17 0.58 4.20 2.43 5.37 1.43 4.38 1.82 33.22
1989 2.94 2.26 3.14 0.34 3.95 5.16 4.09 6.69 3.32 2.80 0.15 0.26 35.10
1990 2.93 4.14 6.51 5.31 5.21 1.08 0.24 1.83 4.19 2.15 2.41 2.94 38.94
1991 1.47 0.38 1.02 2.58 5.11 3.64 0.35 1.17 6.15 5.12 1.98 4.57 33.54
1992 0.48 1.32 1.37 4.75 5.65 8.41 2.12 3.09 2.66 3.53 4.83 5.21 43.42
1993 2.86 2.76 4.59 6.86 3.79 2.42 2.29 6.90 1.13 1.69 1.76
1994 0.68 2.21 3.35 6.57 2.81 2.73 11.39 4.12 3.60 3.68 7.10 1.21 49.45
1995 0.93 0.57 1.83 5.92 10.73 9.84 2.55 1.44 4.96 1.05 0.25 1.77 41.84
1996 0.47 0.16 2.07 1.40 2.14 3.64 3.22 1.34 5.04 5.60 7.16 0.10 32.34
1997 0.27 3.41 1.39 4.09 1.66 5.77 5.64 7.89 3.06 2.07 1.63 4.32 41.20
1998 3.49 0.30 7.30 4.54 2.52 3.36 4.31 1.67 5.13 9.14 3.26 1.58 46.60
1999 3.03 1.25 3.55 7.20 9.55 5.21 0.40 0.42 9.70 1.75 1.32 5.10 48.48
2000 0.89 1.33 3.77 2.71 7.01 6.25 6.58 0.01 1.10 6.32 3.51 1.62 41.10
2001 2.09 2.62 0.77 1.19 6.32 3.04 0.51 2.26 1.95 2.81 3.33 2.25 29.14
POR=65 YRS 1.57 1.82 2.86 3.99 5.52 4.60 3.22 2.97 4.21 3.55 2.68 2.05 39.04

2001 Tulsa, Oklahoma (TUL)

AVERAGE TEMPERATURE (F) 2001 TULSA, OK (TUL)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 34.8 41.8 53.0 62.8 68.0 79.5 80.4 81.7 75.5 60.9 43.6 33.7 59.6
1973 34.0 39.8 54.3 58.2 67.5 76.7 81.2 79.3 72.3 65.0 53.4 38.1 60.0
1974 34.1 43.7 55.2 61.8 72.1 73.8 85.4 78.3 64.7 63.0 49.1 39.7 60.1
1975 39.9 36.9 45.3 60.4 69.1 76.0 81.2 82.2 69.2 63.2 50.8 40.1 59.5
1976 37.2 51.1 51.9 61.5 63.0 75.0 81.4 79.7 72.8 56.1 43.1 37.1 59.2
1977 26.9 46.6 55.0 64.4 72.6 81.0 84.8 81.7 75.6 62.2 51.1 39.0 61.7
1978 24.9 29.4 47.5 63.5 68.3 77.6 87.8 84.3 80.6 63.5 51.6 38.0 59.8
1979 23.1 30.2 52.4 61.0 68.7 77.8 83.4 81.8 74.7 66.2 47.5 44.4 59.3
1980 38.6 37.1 48.3 61.1 70.6 82.5 91.7 89.7 78.3 61.5 50.5 42.3 62.7
1981 37.6 43.6 53.3 68.0 65.9 80.0 85.9 79.4 73.9 60.9 51.4 38.5 61.5
1982 33.6 38.2 55.3 59.3 72.9 74.7 84.2 85.3 74.6 63.4 50.6 44.4 61.4
1983 39.1 42.9 49.0 55.4 67.0 76.6 84.7 88.1 77.4 64.5 52.9 26.7 60.4
1984 34.4 46.4 48.3 58.0 67.5 80.1 82.0 82.7 71.5 63.8 50.4 44.7 60.8
1985 30.2 35.9 54.7 63.3 70.6 75.8 82.9 81.7 74.6 63.1 47.8 34.5 59.6
1986 42.8 43.2 55.0 62.6 69.4 79.7 86.6 78.2 74.7 61.0 43.6 40.0 61.4
1987 36.0 45.4 51.5 63.2 74.1 78.9 81.9 83.1 72.4 59.3 51.6 41.4 61.6
1988 34.8 39.3 49.3 59.5 71.0 79.9 82.6 83.0 73.2 58.5 51.7 43.4 60.5
1989 43.4 31.9 49.3 63.3 69.2 74.8 80.2 80.4 68.7 64.0 52.7 31.6 59.1
1990 46.1 46.1 53.2 59.6 67.4 82.1 83.2 83.5 78.3 61.2 56.4 38.5 63.0
1991 34.7 48.3 55.1 63.8 73.7 80.0 84.9 82.9 72.7 64.3 45.8 44.6 62.6
1992 42.8 50.1 54.9 61.6 67.6 74.7 81.8 76.6 72.8 60.8 45.9 38.6 60.7
1993 35.7 37.8 46.8 55.8 66.0 76.8 84.4 83.5 68.6 56.2 44.5 42.3 58.2
1994 35.2 39.0 52.9 60.4 67.4 80.5 79.3 78.4 70.9 63.4 52.0 42.7 60.2
1995 39.4 44.2 51.5 58.3 65.5 74.1 82.3 84.6 70.5 62.8 48.8 39.4 60.1
1996 35.4 43.0 45.4 59.2 72.9 78.5 81.6 79.8 70.0 61.4 44.9 42.1 59.5
1997 35.9 44.1 52.4 55.9 66.9 75.5 81.7 78.3 73.9 62.0 46.0 39.3 59.3
1998 40.1 44.8 46.7 57.8 72.9 79.9 85.4 84.1 80.8 63.0 53.4 40.8 62.5
1999 39.0 50.0 48.8 61.5 68.1 75.4 84.4 84.6 69.8 62.3 57.7 43.4 62.1
2000 40.0 48.0 53.2 59.5 70.8 74.4 81.4 86.8 75.7 66.2 43.8 28.6 60.7
2001 35.3 41.3 47.1 66.4 70.6 78.2 87.4 85.2 71.9 62.0 55.2 43.6 62.0
POR=66 YRS 36.7 41.6 49.9 60.9 69.0 77.5 82.7 81.8 73.3 62.8 49.3 40.0 60.5

REFERENCE NOTES:

PAGE 1:

THE TEMPERATURE GRAPH SHOWS NORMAL MAXIMUM AND NORMAL MINIMUM DAILY TEMPERATURES (SOLID CURVES) AND THE ACTUAL DAILY HIGH AND LOW TEMPERATURES (VERTICAL BARS).

PAGE 2 AND 3:

H/C INDICATES HEATING AND COOLING DEGREE DAYS.

RH INDICATES RELATIVE HUMIDITY

W/O INDICATES WEATHER AND OBSTRUCTIONS

S INDICATES SUNSHINE.

PR INDICATES PRESSURE.

CLOUDINESS ON PAGE 3 IS THE SUM OF THE CEILOMETER AND SATELLITE DATA NOT TO EXCEED EIGHT EIGHTHS (OKTAS).

GENERAL:

T INDICATES TRACE PRECIPITATION, AN AMOUNT GREATER THAN ZERO BUT LESS THAN THE LOWEST REPORTABLE VALUE.

+ INDICATES THE VALUE ALSO OCCURS ON EARLIER DATES.

BLANK ENTRIES DENOTE MISSING OR UNREPORTED DATA.

NORMALS ARE 30–YEAR AVERAGES (1961–1990).

ASOS INDICATES AUTOMATED SURFACE OBSERVING SYSTEM.

PM INDICATES THE LAST DAY OF THE PREVIOUS MONTH.

POR (PERIOD OF RECORD) BEGINS WITH THE JANUARY DATA MONTH AND IS THE NUMBER OF YEARS USED TO COMPUTE THE MEAN. INDIVIDUAL MONTHS WITHIN THE POR MAY BE MISSING.

WHEN THE POR FOR A NORMAL IS LESS THAN 30 YEARS, THE NORMAL IS PROVISIONAL AND IS BASED ON THE NUMBER OF YEARS INDICATED.

0.* OR * INDICATES THE VALUE OR MEAN–DAYS–WITH IS BETWEEN 0.00 AND 0.05.

CLOUDINESS FOR ASOS STATIONS DIFFERS FROM THE NON–ASOS OBSERVATION TAKEN BY A HUMAN OBSERVER. ASOS STATION CLOUDINESS IS BASED ON TIME–AVERAGED CEILOMETER DATA FOR CLOUDS AT OR BELOW 12,000 FEET AND ON SATELLITE DATA FOR CLOUDS ABOVE 12,000 FEET.

THE NUMBER OF DAYS WITH CLEAR, PARTLY CLOUDY, AND CLOUDY CONDITIONS FOR ASOS STATIONS IS THE SUM OF THE CEILOMETER AND SATELLITE DATA FOR THE SUNRISE TO SUNSET PERIOD.

GENERAL CONTINUED:

CLEAR INDICATES 0–2 OKTAS, PARTLY CLOUDY INDICATES 3–6 OKTAS, AND CLOUDY INDICATES 7 OR 8 OKTAS. WHEN AT LEAST ONE OF THE ELEMENTS (CEILOMETER OR SATELLITE) IS MISSING, THE DAILY CLOUDINESS IS NOT COMPUTED.

WIND DIRECTION IS RECORDED IN TENS OF DEGREES (2 DIGITS) CLOCKWISE FROM TRUE NORTH. "00" INDICATES CALM. "36" INDICATES TRUE NORTH.

RESULTANT WIND IS THE VECTOR AVERAGE OF THE SPEED AND DIRECTION.

AVERAGE TEMPERATURE IS THE SUM OF THE MEAN DAILY MAXIMUM AND MINIMUM TEMPERATURE DIVIDED BY 2.

SNOWFALL DATA COMPRISE ALL FORMS OF FROZEN PRECIPITATION, INCLUDING HAIL.

A HEATING (COOLING) DEGREE DAY IS THE DIFFERENCE BETWEEN THE AVERAGE DAILY TEMPERATURE AND 65 F.

DRY BULB IS THE TEMPERATURE OF THE AMBIENT AIR.

DEW POINT IS THE TEMPERATURE TO WHICH THE AIR MUST BE COOLED TO ACHIEVE 100 PERCENT RELATIVE HUMIDITY.

WET BULB IS THE TEMPERATURE THE AIR WOULD HAVE IF THE MOISTURE CONTENT WAS INCREASED TO 100 PERCENT RELATIVE HUMIDITY.

ON JULY 1, 1996, THE NATIONAL WEATHER SERVICE BEGAN USING THE "METAR" OBSERVATION CODE THAT WAS ALREADY EMPLOYED BY MOST OTHER NATIONS OF THE WORLD. THE MOST NOTICEABLE DIFFERENCE IN THIS ANNUAL PUBLICATION WILL BE THE CHANGE IN UNITS FROM TENTHS TO EIGHTS (OKTAS) FOR REPORTING THE AMOUNT OF SKY COVER.

2001 Tulsa, Oklahoma (TUL)

HEATING DEGREE DAYS (base 65 F) 2001 TULSA, OK (TUL)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0 0 19 183 634 964 954 700 321 233 42 0 4050
1973-74 0 0 24 95 343 824 951 591 341 137 5 0 3311
1974-75 0 0 74 94 473 777 773 780 610 205 19 0 3805
1975-76 0 0 57 146 429 762 855 402 407 126 109 0 3293
1976-77 0 0 16 317 648 858 1173 511 309 99 1 0 3932
1977-78 0 0 1 118 412 801 1236 989 541 110 67 0 4275
1978-79 0 0 0 121 406 834 1293 972 391 164 47 0 4228
1979-80 0 0 0 90 525 632 812 801 513 154 22 0 3549
1980-81 0 0 13 172 438 703 843 598 360 48 58 0 3233
1981-82 0 0 23 178 402 817 967 747 322 208 11 5 3680
1982-83 0 0 23 146 437 635 794 611 492 321 50 0 3509
1983-84 0 0 19 89 378 1179 941 533 509 229 47 0 3924
1984-85 0 0 73 130 438 628 1073 809 330 103 7 0 3591
1985-86 0 0 46 111 510 936 680 602 322 127 13 0 3347
1986-87 0 0 5 148 632 771 893 544 413 149 0 0 3555
1987-88 0 0 1 189 416 727 928 739 483 187 9 0 3679
1988-89 0 0 8 218 393 662 663 921 487 155 53 0 3560
1989-90 0 0 67 126 375 1029 580 527 376 194 54 0 3328
1990-91 0 0 8 172 271 813 933 459 327 83 17 0 3083
1991-92 0 0 35 121 570 628 682 423 311 156 53 0 2979
1992-93 0 0 9 151 565 812 903 755 556 280 57 0 4088
1993-94 0 0 40 294 611 695 917 721 387 186 56 0 3907
1994-95 0 0 25 126 390 683 783 574 436 219 70 0 3306
1995-96 0 0 79 112 480 786 911 640 604 204 19 0 3835
1996-97 0 0 26 152 594 701 896 579 393 275 40 0 3656
1997-98 0 0 3 195 563 791 764 558 581 225 12 6 3698
1998-99 0 0 0 109 344 747 798 415 496 134 18 0 3061
1999-00 0 0 38 130 238 664 770 487 363 183 23 2 2898
2000-01 0 0 26 100 628 1121 914 657 546 93 18 0 4103
2001- 0 0 20 142 298 660

2001 Tulsa, Oklahoma (TUL)

COOLING DEGREE DAYS (base 65 F) 2001 TULSA, OK (TUL)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 6 11 99 144 446 487 524 339 64 0 0 2120
1973 0 0 0 35 124 357 508 452 249 101 5 0 1831
1974 0 0 47 48 232 270 641 419 71 40 2 0 1770
1975 0 0 9 77 156 335 509 542 192 97 12 0 1929
1976 0 6 7 28 52 307 520 461 256 48 0 0 1685
1977 0 1 6 84 248 486 619 525 327 38 0 0 2334
1978 0 0 7 73 180 388 713 605 476 79 14 0 2535
1979 0 0 9 48 167 388 577 527 298 137 6 0 2157
1980 0 0 0 43 200 533 833 774 419 69 6 4 2881
1981 0 5 4 145 96 456 658 452 296 57 1 0 2170
1982 0 0 28 44 266 300 601 637 319 106 10 5 2316
1983 0 0 3 40 120 353 615 725 396 80 20 0 2352
1984 0 0 0 25 132 464 534 556 272 100 9 2 2094
1985 0 0 19 59 185 333 564 523 340 57 0 0 2080
1986 0 0 20 60 157 448 676 415 303 31 0 0 2110
1987 0 0 2 102 290 421 532 567 230 18 19 0 2181
1988 0 0 2 30 200 454 555 564 262 23 1 0 2091
1989 0 0 6 107 191 300 475 483 183 105 14 0 1864
1990 0 0 17 38 137 521 571 581 416 63 21 0 2365
1991 0 0 29 53 293 458 622 562 274 108 3 0 2402
1992 0 0 5 63 140 298 526 369 251 29 0 0 1681
1993 0 0 1 7 95 360 609 579 153 27 0 0 1831
1994 0 0 21 55 135 470 452 424 212 82 8 0 1859
1995 0 0 24 26 97 282 545 618 252 50 0 0 1894
1996 0 6 0 37 273 410 522 463 183 49 0 0 1943
1997 3 0 9 10 106 321 524 420 278 108 0 0 1779
1998 0 0 18 16 264 459 640 598 480 53 5 2 2535
1999 0 2 0 35 118 318 607 616 190 57 25 0 1968
2000 0 0 2 26 211 290 517 684 353 143 1 0 2227
2001 0 2 0 139 197 401 700 630 236 56 10 3 2374

2001 Tulsa, Oklahoma (TUL)

SNOWFALL (inches) 2001 TULSA, OK (TUL)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0.0 0.0 0.0 0.0 5.6 1.7 4.3 2.2 0.0 0.3 0.0 0.0 14.1
1973-74 0.0 0.0 0.0 0.0 T 1.8 T T T T 0.0 0.0 1.8
1974-75 0.0 0.0 0.0 0.0 1.7 T T 3.0 1.8 T 0.0 0.0 6.5
1975-76 0.0 0.0 0.0 0.0 0.8 1.3 T T T 0.0 0.0 0.0 2.1
1976-77 0.0 0.0 0.0 0.0 0.5 T 10.5 0.3 0.0 0.0 0.0 0.0 11.3
1977-78 0.0 0.0 0.0 0.0 T 0.0 5.4 6.3 T 0.0 0.0 0.0 11.7
1978-79 0.0 0.0 0.0 0.0 0.0 2.8 12.7 3.4 0.0 T 0.0 0.0 18.9
1979-80 0.0 0.0 0.0 0.0 T 0.0 0.4 3.8 T 0.0 0.0 0.0 4.2
1980-81 0.0 0.0 0.0 0.0 T 0.0 T 0.9 T 0.0 0.0 0.0 0.9
1981-82 0.0 0.0 0.0 0.0 0.0 T 0.3 5.6 T 0.0 0.0 0.0 5.9
1982-83 0.0 0.0 0.0 0.0 T T 3.8 1.4 T 0.0 0.0 0.0 5.2
1983-84 0.0 0.0 0.0 0.0 T 3.0 4.6 0.2 T 0.0 0.0 0.0 7.8
1984-85 0.0 0.0 0.0 0.0 0.0 6.6 3.3 4.3 0.0 0.0 0.0 0.0 14.2
1985-86 0.0 0.0 0.0 0.0 T 2.5 0.0 4.9 0.0 0.0 0.0 0.0 7.4
1986-87 0.0 0.0 0.0 0.0 0.0 0.0 8.7 4.6 0.0 0.0 0.0 0.0 13.3
1987-88 0.0 0.0 0.0 0.0 T 6.7 11.0 T 0.5 0.0 0.0 0.0 18.2
1988-89 0.0 0.0 0.0 0.0 0.4 2.7 3.4 0.3 9.7 0.0 0.0 0.0 16.5
1989-90 0.0 0.0 0.0 0.0 0.0 2.0 0.0 0.0 0.2 0.0 0.0 0.0 2.2
1990-91 0.0 0.0 0.0 0.0 0.0 4.6 T 1.4 T 0.0 T 0.0 6.0
1991-92 0.0 0.0 0.0 0.0 0.2 0.1 0.8 0.0 T T 0.0 0.0 1.1
1992-93 0.0 0.0 0.0 0.0 3.5 1.1 0.8 6.7 T T 0.0 0.0 12.1
1993-94 0.0 0.0 0.0 0.3 0.0 0.0 T T 14.1 T 0.0 T 14.4
1994-95 T 0.0 0.0 0.0 T 0.0 1.8 T 6.3 0.0 0.0 0.0 8.1
1995-96 0.0 0.0 0.0 0.0 1.8 T 1.0 5.0 0.0 0.0 0.0 0.0 7.8
1996-97 0.0 0.0 0.0 T T T 5.9 0.3 0.0 T 0.0 0.0 6.2
1997-98 T 0.0 0.0 0.0 T 0.6 4.0 0.0 T 0.0 0.0 0.0 4.6
1998-99 0.0 0.0 0.0 0.0 0.0 T 3.3 0.0 5.9 0.0 0.0 0.0 9.2
1999-00 0.0 0.0 0.0 0.0 0.0 T 7.1 0.0 2.2 0.0 0.0 0.0 9.3
2000-01 0.0 0.0 0.0 T 2.1 11.4 1.4 T 0.0 0.0 0.0 0.0 14.9
2001- 0.0 0.0 0.0 0.0 3.0 T
POR=66 YRS T 0.0 0.0 T 0.4 1.7 3.1 2.3 1.8 T T T 9.3



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2001 Tulsa, Oklahoma (TUL) forum