2001 OKLAHOMA CITY, OKLAHOMA (OKC)



Oklahoma City is located along the North Canadian River, a frequently nearly–dry stream, at the geographic center of the state. It is not quite 1,000 miles south of the Canadian Border and a little less than 500 miles north of the Gulf of Mexico. The surrounding country is gently rolling with the nearest hills or low mountains, the Arbuckles, 80 miles south. The elevation ranges around 1,250 feet above sea level.

Although some influence is exerted at times by warm, moist air currents from the Gulf of Mexico, the climate of Oklahoma City falls mainly under continental controls characteristic of the Great Plains Region. The continental effect produces pronounced daily and seasonal temperature changes and considerable variation in seasonal and annual precipitation. Summers are long and usually hot. Winters are comparatively mild and short.

During the year, temperatures of 100 degrees or more occur on an average of 10 days, but have occurred on as many as 50 days or more. While summers are usually hot, the discomforting effect of extreme heat is considerably mitigated by low humidity and the prevalence of a moderate southerly breeze. Approximately one winter in three has temperatures of zero or lower.

The length of the growing season varies from 180 to 251 days. Average date of last freeze is early April and average date of first freeze is early November. Freezes have occurred in early October.

During an average year, skies are clear approximately 40 percent of the time, partly cloudy 25 percent, and cloudy 35 percent of the time. The city is almost smoke–free as a result of favorable atmospheric conditions and the almost exclusive use of natural gas for heating. Flying conditions are generally very good with flight by visual flight rules possible about 96 percent of the time.

Summer rainfall comes mainly from showers and thunderstorms. Winter precipitation is generally associated with frontal passages. Measurable precipitation has occurred on as many as 122 days and as few as 55 days during the year. The seasonal distribution of precipitation is normally 12 percent in winter, 34 percent in spring, 30 percent in summer, and 24 percent in fall. The The period with the least number of days with precipitation is November through January, and the month with the most rainy days is May. Thunderstorms occur most often in late spring and early summer. Large hail and/or destructive winds on occasion accompany these thunderstorms.

Snowfall averages less than 10 inches per year and seldom remains on the ground very long. Occasional brief periods of freezing rain and sleet storms occur.

Heavy fogs are infrequent. Prevailing winds are southerly except in January and February when northerly breezes predominate.

NORMALS, MEANS, AND EXTREMES

OKLAHOMA CITY, OK (OKC)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 13967

35 23′ 19″ N  97 36′ 01″ W  GRND:  1281  BARO: &#x 0A0;1284  CENTRAL (UTC + 6)

2001 Oklahoma City, Oklahoma (OKC)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 46.7 52.1 62.0 71.9 79.1 87.3 93.4 92.5 83.8 73.6 60.4 49.9 71.1
MEAN DAILY MAXIMUM 62 46.9 52.7 61.3 71.5 79.1 87.3 93.1 92.7 84.4 74.1 59.8 50.3 71.1
HIGHEST DAILY MAXIMUM 47 80 92 93 100 104 105 110 110 108 96 87 86 110
YEAR OF OCCURRENCE 1986 1996 1967 1972 1985 1998 1996 1980 2000 1972 1980 1955 JUL 1996
MEAN OF EXTREME MAXS. 53 69.2 74.9 82.2 87.5 91.6 96.8 101.4 101.4 96.8 89.1 77.6 70.5 86.6
NORMAL DAILY MINIMUM 30 25.2 29.6 38.5 48.8 57.7 66.1 70.6 69.6 62.2 50.4 38.6 28.6 48.8
MEAN DAILY MINIMUM 62 26.4 30.8 38.0 48.8 58.0 66.7 70.8 69.8 62.0 51.1 38.2 29.6 49.2
LOWEST DAILY MINIMUM 47 -4 -3 3 20 37 47 53 51 36 16 11 -8 -8
YEAR OF OCCURRENCE 1988 1996 1960 1957 1981 1954 1971 1956 1989 1993 1991 1989 DEC 1989
MEAN OF EXTREME MINS. 53 7.7 12.9 20.2 32.3 44.6 55.6 62.4 60.3 46.4 33.9 21.8 12.3 34.2
NORMAL DRY BULB 30 35.9 40.9 50.3 60.4 68.4 76.7 82.0 81.1 73.0 62.0 49.6 39.3 60.0
MEAN DRY BULB 62 36.8 41.8 49.7 60.2 68.6 77.1 82.0 81.4 73.2 62.6 49.1 39.9 60.2
MEAN WET BULB 59 32.2 36.5 43.0 52.4 61.3 68.5 71.1 69.8 64.1 54.6 43.0 35.2 52.6
MEAN DEW POINT 59 25.9 29.7 35.5 45.8 57.0 64.8 66.3 65.0 59.2 48.6 36.8 28.9 47.0
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.1 0.5 2.2 12.0 22.4 22.4 8.8 1.2 0.0 0.0 69.6
MAXIMUM 32 30 5.2 2.4 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 2.9 10.8
MINIMUM 32 30 23.1 17.0 8.4 0.9 0.0 0.0 0.0 0.0 0.0 0.4 7.9 20.0 77.7
MINIMUM 0 30 0.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.8
H/C NORMAL HEATING DEG. DAYS 30 902 675 464 176 31 0 0 0 15 137 462 797 3659
NORMAL COOLING DEG. DAYS 30 0 0 9 38 136 351 527 499 255 44 0 0 1859
RH NORMAL (PERCENT) 30 67 66 61 61 68 67 61 62 67 64 67 68 65
HOUR 00 LST 30 72 72 68 69 76 77 70 70 76 72 74 73 72
HOUR 06 LST 30 77 77 75 76 83 84 80 80 83 79 79 78 79
HOUR 12 LST 30 58 58 52 51 57 56 49 50 55 52 56 58 54
HOUR 18 LST 30 58 54 48 48 54 53 46 46 53 54 60 62 53
S PERCENT POSSIBLE SUNSHINE 41 60 61 65 66 66 76 80 80 74 70 62 59 68
W/O MEAN NO. DAYS WITH:
HEAVY FOG(VISBY 1/4 MI) 52 3.8 3.3 1.8 1.0 0.8 0.5 0.3 0.5 0.8 1.6 2.1 3.3 19.8
THUNDERSTORMS 61 0.5 1.4 3.3 5.5 8.8 8.7 6.0 6.3 5.1 3.4 1.3 0.7 51.0
CLOUDINESS MEAN:
SUNRISE-SUNSET (OKTAS) 2 4.8 5.1 5.3 4.8 5.2 2.4 2.0 2.7 4.8 3.6 3.2 4.8 4.1
MIDNIGHT-MIDNIGHT (OKTAS) 1 4.8 5.2 5.1 4.8 5.2 2.4 2.0 2.4 2.4 3.2 3.6 4.0 3.8
MEAN NO. DAYS WITH:
CLEAR 2 4.3 10.0 8.3 10.5 8.7 13.0 16.0 15.0 7.0 12.5 5.5 8.5 119.3
PARTLY CLOUDY 2 4.7 2.7 2.7 2.0 6.0 5.3 4.5 4.5 3.0 4.0 4.5 5.0 48.9
CLOUDY 2 7.3 10.0 7.0 8.0 6.3 3.3 2.5 3.0 2.0 5.0 6.5 7.5 68.4
PR MEAN STATION PRESSURE(IN) 28 28.73 28.69 28.59 28.58 28.55 28.58 28.63 28.64 28.66 28.69 28.68 28.73 28.65
MEAN SEA-LEVEL PRES. (IN) 59 30.15 30.09 29.98 29.94 29.92 29.90 29.96 29.97 30.00 30.04 30.07 30.12 30.01
WINDS MEAN SPEED (MPH) 40 13.1 13.8 14.9 14.6 13.1 12.4 11.4 10.6 11.5 12.3 12.9 12.8 12.8
PREVAIL. DIR (TENS OF DEGS) 21 36 36 16 16 16 16 16 16 16 16 16 36 16
MAXIMUM 2-MINUTE:
SPEED (MPH) 8 45 45 52 46 47 41 48 46 38 43 46 44 52
DIR. (TENS OF DEGS) 34 32 24 32 01 25 34 05 33 03 19 33 24
YEAR OF OCCURRENCE 1996 1997 1996 1999 2001 1993 2000 1996 1998 1994 1994 2000 MAR 1996
MAXIMUM 5-SECOND:
SPEED (MPH) 8 53 54 62 55 63 63 64 52 48 51 56 52 64
DIR. (TENS OF DEGS) 33 33 23 32 01 22 33 05 29 03 20 33 33
YEAR OF OCCURRENCE 1996 1997 1996 1999 2001 1998 2000 1996 1998 1994 1994 2000 JUL 2000
PRECIPITATION NORMAL (IN) 30 1.13 1.56 2.71 2.77 5.22 4.31 2.61 2.60 3.84 3.23 1.98 1.40 33.36
MAXIMUM MONTHLY (IN) 61 5.68 4.63 7.85 10.78 12.07 14.66 11.90 6.77 11.85 13.18 5.72 8.14 14.66
YEAR OF OCCURRENCE 1949 1990 1988 1947 1982 1989 1996 1966 1991 1983 1994 1984 JUN 1989
MINIMUM MONTHLY (IN) 61 0.00 T T 0.17 0.33 0.55 T 0.00 T T T 0.03 0.00
YEAR OF OCCURRENCE 1985 1947 1940 1989 1942 2001 1983 2000 1948 1958 1949 1996 AUG 2000
MAXIMUM IN 24 HOURS (IN) 61 3.10 2.21 3.44 4.48 7.56 4.56 5.75 3.56 7.68 8.95 2.89 2.89 8.95
YEAR OF OCCURRENCE 1982 1978 1944 1999 1993 1989 1981 1989 1970 1983 1994 1991 OCT 1983
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 5.1 6.1 7.2 7.4 9.6 8.1 6.1 6.7 7.7 6.5 5.7 5.6 81.8
PRECIPITATION 1.00 30 0.3 0.3 0.8 0.8 1.5 1.4 0.7 0.9 1.1 0.9 0.6 0.4 9.7
SNOWFALL NORMAL (IN) 30 2.8 2.7 1.2 0.* 0.0 0.0 0.0 0.0 0.0 0.0 0.6 1.8 9.1
MAXIMUM MONTHLY (IN) 61 17.3 12.0 13.9 0.7 T T T T T 0.1 7.5 8.3 17.3
YEAR OF OCCURRENCE 1949 1978 1968 1957 1992 1992 1997 1997 1992 1993 1972 1987 JAN 1949
MAXIMUM IN 24 HOURS (IN) 61 8.9 6.5 8.4 0.7 T T T T T 0.1 5.5 8.3 8.9
YEAR OF OCCURRENCE 1988 1986 1948 1957 1992 1992 1997 1997 1992 1993 1972 1987 JAN 1988
MAXIMUM SNOW DEPTH (IN) 53 12 8 8 T 0 0 0 0 0 T 3 7 12
YEAR OF OCCURRENCE 1988 1951 1948 1973 1993 1980 1987 JAN 1988
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 0.9 1.1 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.6 3.1

2001 Oklahoma City, Oklahoma (OKC)

PRECIPITATION (inches) 2001 OKLAHOMA CITY, OK (OKC)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.21 0.43 1.13 3.10 4.03 1.36 3.22 1.82 2.04 7.17 2.28 0.84 27.63
1973 3.39 0.31 6.76 2.32 3.61 6.31 3.38 1.36 8.00 3.05 2.81 0.47 41.77
1974 0.10 2.68 3.12 4.66 5.01 3.36 0.48 4.42 6.24 5.57 2.34 1.47 39.45
1975 1.99 1.90 1.72 1.92 8.76 4.82 7.71 0.60 1.92 0.84 1.77 1.30 35.25
1976 T 0.33 3.09 2.94 4.36 0.88 1.38 1.46 1.53 1.78 0.12 0.19 18.06
1977 0.32 1.40 1.30 2.88 7.97 2.00 4.10 3.08 1.20 2.41 1.59 0.34 28.59
1978 1.26 3.23 1.32 1.65 10.12 4.04 3.75 0.25 0.96 1.02 2.88 0.70 31.18
1979 1.55 0.63 2.73 2.78 7.29 9.94 5.62 3.78 0.72 1.58 1.93 2.57 41.12
1980 1.69 1.29 1.38 2.16 9.00 2.52 0.42 0.60 2.21 0.99 0.51 1.58 24.35
1981 0.19 1.15 2.87 2.97 2.73 7.49 6.45 3.61 1.48 7.70 2.11 0.20 38.95
1982 3.68 0.98 1.63 1.92 12.07 4.06 2.11 1.13 2.86 1.03 2.78 1.94 36.19
1983 2.62 1.71 2.51 2.34 6.88 3.18 T 3.18 0.90 13.18 1.90 0.70 39.10
1984 0.35 1.16 4.70 1.79 1.62 3.48 0.30 2.35 1.01 6.64 2.05 8.14 33.59
1985 0.92 3.71 6.60 5.35 1.49 8.34 1.33 2.63 4.59 5.23 3.73 0.26 44.18
1986 0.00 0.68 1.75 4.42 8.21 3.11 0.38 3.29 9.54 8.00 4.63 1.16 45.17
1987 2.45 4.05 2.33 0.41 11.86 6.50 2.99 1.83 4.58 1.82 1.92 3.75 44.49
1988 1.24 0.41 7.85 3.19 1.07 3.59 1.92 1.60 5.19 2.04 2.45 1.39 31.94
1989 1.17 2.20 2.72 0.17 4.33 14.66 1.91 5.55 4.51 3.26 0.09 0.32 40.89
1990 1.85 4.63 4.43 5.11 5.79 1.25 2.65 3.16 7.35 1.27 1.59 1.46 40.54
1991 0.89 0.03 1.59 2.10 6.39 3.85 1.98 3.24 11.85 3.98 1.94 5.90 43.74
1992 1.15 1.28 1.08 3.64 4.88 6.35 4.01 5.82 2.92 1.13 4.51 3.08 39.85
1993 1.90 3.21 2.82 2.50 10.90 2.65 1.24 1.86 7.05 0.47 1.34 1.27 37.21
1994 0.21 2.56 3.18 3.38 2.69 1.70 2.17 1.81 2.17 1.88 5.72 1.63 29.10
1995 1.28 0.04 2.21 3.76 7.39 6.06 1.94 3.15 6.66 1.54 0.39 2.35 36.77
1996 0.08 0.02 2.17 2.00 1.90 1.16 11.90 5.85 5.88 2.53 3.36 T 36.85
1997 0.52 2.59 0.60 4.39 3.68 3.01 4.60 4.04 1.66 3.93 1.11 2.96 33.09
1998 4.09 0.32 6.45 3.34 2.12 2.67 0.02 0.48 4.39 6.76 3.09 1.62 35.35
1999 1.81 1.20 3.45 6.92 3.10 8.61 1.94 1.35 4.88 2.22 0.06 3.71 39.25
2000 0.75 1.47 3.12 5.17 1.36 6.71 5.25 0.00 1.73 8.39 2.79 2.30 39.04
2001 2.23 2.25 1.01 1.04 7.70 0.55 1.27 1.95 5.55 3.56 1.08 0.91 29.10
POR=63 YRS 1.24 1.49 2.40 3.13 5.27 4.31 2.80 2.54 3.70 3.03 1.79 1.53 33.23

2001 Oklahoma City, Oklahoma (OKC)

AVERAGE TEMPERATURE (F) 2001 OKLAHOMA CITY, OK (OKC)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 34.9 42.1 53.4 63.2 67.6 79.0 79.8 80.4 75.8 61.1 43.4 34.4 59.6
1973 33.3 39.8 52.5 56.0 66.8 75.2 79.8 79.7 70.6 64.3 53.1 39.3 59.2
1974 35.0 44.4 54.8 60.0 71.5 74.1 82.7 78.5 65.5 63.5 49.3 39.6 59.9
1975 40.3 36.5 46.1 58.7 67.4 75.1 78.0 80.1 68.3 63.4 50.7 41.8 58.9
1976 39.0 52.2 52.4 61.6 63.6 74.8 79.8 81.3 72.6 56.5 43.9 38.8 59.7
1977 29.2 45.9 54.1 62.5 70.0 79.6 83.0 80.7 78.0 62.7 50.9 40.0 61.4
1978 26.3 29.4 49.1 64.5 68.1 77.3 87.0 82.6 79.7 64.7 50.4 36.9 59.7
1979 25.4 31.5 51.2 58.1 65.8 75.2 81.0 80.0 73.1 65.7 46.5 43.3 58.1
1980 38.2 38.2 46.3 56.7 69.0 81.4 88.3 88.0 76.3 61.1 50.3 41.9 61.3
1981 37.7 43.9 51.9 65.6 65.7 78.4 84.2 78.8 74.1 60.1 50.3 39.1 60.8
1982 35.3 37.7 52.7 57.5 68.2 72.2 81.0 84.1 74.5 62.7 48.6 43.2 59.8
1983 38.6 42.6 48.8 54.0 64.6 73.4 81.6 84.0 74.9 62.7 50.4 25.8 58.5
1984 34.0 45.4 46.4 56.5 68.4 78.6 81.6 82.6 71.5 61.6 49.7 43.0 59.9
1985 30.6 37.2 53.0 62.7 70.0 76.0 80.9 81.3 73.1 61.2 46.1 35.1 58.9
1986 43.6 44.8 55.5 62.8 69.0 79.0 85.9 80.0 74.8 61.6 44.8 40.8 61.9
1987 35.1 45.9 50.3 61.8 72.6 77.1 80.1 82.2 72.4 60.0 50.5 40.6 60.7
1988 34.2 40.3 49.5 58.9 70.3 78.4 81.6 82.8 73.5 59.3 51.2 43.9 60.3
1989 42.8 33.1 51.1 63.4 69.4 74.3 79.6 78.3 67.8 63.1 52.2 32.7 59.0
1990 45.9 46.0 52.6 59.2 68.6 82.0 80.7 81.6 77.0 60.9 54.9 37.1 62.2
1991 34.9 49.0 54.3 62.5 72.3 78.0 82.2 81.2 70.9 62.6 45.0 44.1 61.4
1992 42.0 49.9 54.1 61.3 66.5 74.1 81.1 74.8 72.5 62.3 45.9 39.8 60.4
1993 36.5 38.8 48.0 56.2 66.0 76.8 83.6 82.3 69.8 57.1 44.2 42.0 58.4
1994 36.0 37.4 52.7 59.4 66.8 79.6 79.9 79.7 70.7 62.6 50.1 42.5 59.8
1995 38.6 44.9 49.8 56.8 64.3 73.0 81.0 81.5 70.9 61.6 49.3 39.9 59.3
1996 35.8 44.3 46.0 58.7 73.8 77.9 81.3 78.0 69.4 61.2 46.3 42.3 59.6
1997 37.8 44.0 52.5 54.7 66.7 75.4 81.6 78.6 75.3 62.3 46.5 39.1 59.5
1998 40.6 45.5 47.4 57.4 72.5 81.1 88.0 85.0 81.2 64.4 53.2 41.6 63.2
1999 40.5 50.7 49.8 61.3 68.1 75.7 82.2 84.8 71.1 62.7 56.8 43.3 62.3
2000 40.7 49.1 53.4 59.0 71.0 74.6 80.8 85.4 76.1 64.1 43.3 30.5 60.7
2001 36.3 40.8 46.6 63.6 69.5 76.4 85.7 82.9 70.7 60.2 53.9 42.2 60.7
POR=63 YRS 36.8 41.9 49.9 60.1 68.5 76.9 82.0 81.4 73.3 62.6 49.1 39.9 60.2

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 Oklahoma City, Oklahoma (OKC)

HEATING DEGREE DAYS (base 65 F) 2001 OKLAHOMA CITY, OK (OKC)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0 0 23 225 640 940 975 701 380 283 55 0 4222
1973-74 0 0 37 99 362 787 922 573 330 168 8 0 3286
1974-75 0 0 56 88 463 784 763 792 583 235 29 0 3793
1975-76 0 0 64 126 430 713 801 367 406 128 100 0 3135
1976-77 0 0 19 306 629 805 1103 529 338 107 7 0 3843
1977-78 0 0 0 115 420 766 1192 990 493 90 64 0 4130
1978-79 0 0 2 89 437 866 1221 932 434 217 81 0 4279
1979-80 0 0 2 92 551 669 823 771 572 249 24 0 3753
1980-81 0 0 23 180 444 710 839 587 400 69 69 0 3321
1981-82 0 0 22 189 434 797 913 759 382 248 25 13 3782
1982-83 0 0 14 156 490 671 809 622 496 345 96 9 3708
1983-84 0 0 25 117 439 1207 955 561 572 263 45 0 4184
1984-85 0 0 75 162 462 676 1059 773 377 108 10 0 3702
1985-86 0 0 63 146 562 921 656 562 308 122 17 0 3357
1986-87 0 0 2 137 599 742 918 528 450 177 3 0 3556
1987-88 0 0 1 165 442 748 948 712 473 204 14 0 3707
1988-89 0 0 8 196 408 644 679 887 441 140 38 0 3441
1989-90 0 0 78 135 386 993 583 525 387 202 52 0 3341
1990-91 0 0 9 169 307 860 925 444 339 110 25 0 3188
1991-92 0 0 37 150 594 642 704 430 332 154 59 2 3104
1992-93 0 1 5 115 563 774 878 725 525 265 53 0 3904
1993-94 0 1 27 269 619 706 896 767 394 204 53 0 3936
1994-95 0 0 31 138 451 690 810 554 477 253 84 0 3488
1995-96 0 0 75 129 465 767 898 602 584 209 10 0 3739
1996-97 0 0 29 151 556 697 839 583 385 310 43 0 3593
1997-98 0 1 2 188 549 798 750 542 554 238 9 3 3634
1998-99 0 0 0 75 347 719 752 398 463 144 28 0 2926
1999-00 0 0 34 115 249 669 746 457 354 192 40 1 2857
2000-01 0 0 35 113 648 1063 882 672 561 105 22 0 4101
2001- 0 0 18 169 338 698

2001 Oklahoma City, Oklahoma (OKC)

COOLING DEGREE DAYS (base 65 F) 2001 OKLAHOMA CITY, OK (OKC)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 2 11 97 133 429 470 483 351 109 0 0 2085
1973 0 0 0 19 119 312 465 462 216 83 11 0 1687
1974 0 0 22 26 217 280 553 426 80 47 0 0 1651
1975 0 0 1 53 108 310 410 476 170 83 4 0 1615
1976 0 1 23 33 62 300 468 512 253 50 0 0 1702
1977 0 1 8 37 170 445 565 491 395 49 2 0 2163
1978 0 0 8 80 165 378 690 553 450 87 7 0 2418
1979 0 0 10 18 112 314 505 471 252 121 2 0 1805
1980 0 0 0 7 155 498 729 721 366 65 11 2 2554
1981 0 4 0 94 98 409 603 435 304 47 0 0 1994
1982 0 0 9 28 130 234 503 598 305 90 3 1 1901
1983 0 0 0 20 91 266 523 599 329 54 8 0 1890
1984 0 0 0 16 159 414 521 551 279 64 5 0 2009
1985 0 0 12 43 172 336 501 512 313 38 0 0 1927
1986 0 2 21 63 147 425 653 473 301 40 0 0 2125
1987 0 0 0 88 242 371 475 543 230 18 12 0 1979
1988 0 0 1 29 186 410 525 558 270 25 1 0 2005
1989 0 0 16 100 179 285 459 419 170 83 8 0 1719
1990 0 0 12 33 169 517 495 522 378 48 13 0 2187
1991 0 0 15 45 257 398 542 507 219 85 1 0 2069
1992 0 0 3 51 114 283 508 312 239 36 0 1 1547
1993 0 0 4 9 89 362 584 545 177 32 0 0 1802
1994 0 0 20 44 116 446 470 464 208 70 9 0 1847
1995 0 0 11 14 72 250 506 521 262 33 0 0 1669
1996 0 7 4 28 288 382 514 408 170 42 0 0 1843
1997 2 0 5 7 104 316 520 429 317 112 0 0 1812
1998 0 0 13 16 252 496 719 627 497 62 2 0 2684
1999 0 4 0 40 131 327 540 619 225 51 10 0 1947
2000 0 0 3 20 232 295 498 639 372 94 0 0 2153
2001 0 0 0 70 168 348 650 563 196 27 8 1 2031

2001 Oklahoma City, Oklahoma (OKC)

SNOWFALL (inches) 2001 OKLAHOMA CITY, OK (OKC)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0.0 0.0 0.0 0.0 7.5 1.4 8.3 0.2 T T 0.0 0.0 17.4
1973-74 0.0 0.0 0.0 0.0 0.0 0.6 0.7 1.0 0.5 0.0 0.0 0.0 2.8
1974-75 0.0 0.0 0.0 0.0 1.0 2.0 0.6 0.9 0.1 0.0 0.0 0.0 4.6
1975-76 0.0 0.0 0.0 0.0 0.7 3.9 T 0.3 0.0 0.0 0.0 0.0 4.9
1976-77 0.0 0.0 0.0 0.0 0.3 T 2.8 0.4 0.0 0.0 0.0 0.0 3.5
1977-78 0.0 0.0 0.0 0.0 T 0.0 8.4 12.0 T 0.0 0.0 0.0 20.4
1978-79 0.0 0.0 0.0 0.0 0.0 3.3 4.0 6.1 0.0 0.0 0.0 0.0 13.4
1979-80 0.0 0.0 0.0 0.0 T T T 1.8 T 0.0 0.0 0.0 1.8
1980-81 0.0 0.0 0.0 0.0 4.0 0.0 T T 0.0 0.0 0.0 0.0 4.0
1981-82 0.0 0.0 0.0 0.0 0.0 T 1.0 3.9 2.5 0.0 0.0 0.0 7.4
1982-83 0.0 0.0 0.0 0.0 T T 5.1 4.3 T 0.0 0.0 0.0 9.4
1983-84 0.0 0.0 0.0 0.0 T 1.9 5.6 2.0 T 0.0 0.0 0.0 9.5
1984-85 0.0 0.0 0.0 0.0 T 6.1 1.5 2.3 0.0 0.0 0.0 0.0 9.9
1985-86 0.0 0.0 0.0 0.0 T 2.9 0.0 10.9 0.0 0.0 0.0 0.0 13.8
1986-87 0.0 0.0 0.0 0.0 0.0 T 10.0 1.0 T 0.0 0.0 0.0 11.0
1987-88 0.0 0.0 0.0 0.0 2.0 8.3 12.1 0.2 0.9 0.0 0.0 0.0 23.5
1988-89 0.0 0.0 0.0 0.0 0.6 2.0 4.8 T 4.0 0.6 T 0.0 12.0
1989-90 0.0 0.0 0.0 0.0 T 1.7 0.0 1.7 0.1 0.0 0.0 0.0 3.5
1990-91 0.0 0.0 0.0 0.0 0.0 4.2 T 0.0 T 0.0 0.0 0.0 4.2
1991-92 0.0 0.0 0.0 T 2.1 1.0 5.0 0.0 T 0.0 T T 8.1
1992-93 0.0 0.0 T T 3.3 0.4 1.8 T T 0.0
1993-94 0.0 0.0 0.0 0.1 0.0 T 0.5 T 6.0 0.0 0.0
1994-95 0.0 0.0 0.0 0.0 0.0 0.0 4.9 T 4.5 T T T 9.4
1995-96 0.0 0.0 0.0 0.5 4.1 1.0 0.3 T 0.0 T
1996-97 T 6.5 T 0.0 T
1997-98 T T 0.0 0.0 0.1 2.0 T T T 0.0 T T 2.1
1998-99 0.0 0.0 0.0 T 0.0 1.0 T 0.0 1.3 T T 0.0 2.3
1999-00 0.0 0.0 T 0.0 0.0 T 9.1 0.0 T T 0.0 0.0 9.1
2000-01 0.0 0.0 0.0 T T 8.2 3.4 T T 0.0 T 0.0 11.6
2001- 0.0 0.0 T T 3.2 1.5
POR=60 YRS 0.0 0.0 T T 0.1 1.9 3.0 2.3 T T T T 7.3



User Contributions:

Lynn
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Jan 18, 2012 @ 11:23 pm
Your westibe has to be the electronic Swiss army knife for this topic.

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