Monthly Climatological Summary
Norman 3SE, Cleveland Co., OK (Lat 35^10'57"N, Lon 97^25'27"W, elev 1130)
September 2001
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Temperature Precipitation Snow AM PM
Max Min Water Snow Depth Wx Wx
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01 88.5 66.6 .00 0.0 0 SKC SCT
02 91.2 67.1 .00 0.0 0 SCT SCT
03 91.9 71.1 T 0.0 0 BKN -TSRA
04 88.3 72.3 .00 0.0 0 OVC TS
05 86.7 69.8 .87 0.0 0 BKN RA
06 87.3 70.0 .04 0.0 0 -DZ SCT
07 90.1 65.8 .98 T 0 TS +TSRA GR
08 79.2 60.4 .00 0.0 0 OVC TS
09 75.6 55.8 .00 0.0 0 BKN SKC
10 79.3 50.4 .00 0.0 0 SKC FEW
11 81.3 52.2 .00 0.0 0 SCT SCT
12 86.5 61.3 .00 0.0 0 SKC SKC
13 85.3 59.0 .00 0.0 0 SKC SCT
14 88.9 64.8 .00 0.0 0 BKN BKN
15 75.9 66.9 1.06 0.0 0 RA +RA
16 83.5 67.8 .00 0.0 0 FG HZ
17 84.6 69.3 T 0.0 0 OVC -SHRA
18 74.7 64.8 2.68 0.0 0 +TSRA SKC
19 78.3 61.0 .00 0.0 0 SCT SCT
20 78.4 62.6 1.31 0.0 0 +TSRA BKN
21 82.0 63.9 .00 0.0 0 BKN SCT
22 85.3 66.2 .00 0.0 0 FG SCT
23 78.1 57.2 .00 0.0 0 SCT SCT
24 66.2 53.8 .00 0.0 0 OVC SCT
25 69.3 46.0 .00 0.0 0 SKC SKC
26 73.2 47.1 .00 0.0 0 SCT SCT
27 77.2 52.9 .00 0.0 0 SCT FEW
28 77.7 54.1 .00 0.0 0 SCT SKC
29 76.6 51.8 .00 0.0 0 SKC SCT
30 74.5 47.8 .00 0.0 0 SKC SKC
KEY TO AM/PM WX: SKC - sky clear, FEW - few clouds, SCT -
partly cloudy, BKN - mostly cloudy, OVC - overcast, RA -
rain, SHRA - rain shower, DZ - drizzle, TS - thunderstorm,
TSRA - thunderstorm with rain, GR - hail, FG - fog, HZ -
haze
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Means and Totals for September 2001
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Average Maximum Temperature: 81.2
Average Minimum Temperature: 60.7
Mean Temperature: 70.9
Maximum Temperature: 91.9 (9-03-01)
Minimum Temperature: 46.0 (9-25-01)
Days with max temperature 90.0F+: 3 Year: 77
Days with max temperature <32.0F: 0 Year: 3
Days with min temperature <32.0F: 0 Year: 39
Days with min temperature <0.0F: 0 Year: 0
Precipitation: 6.94 Year: 24.71
Greatest one-day precipitation: 2.68 (9-18-01)
Snowfall: T Year: 1.5
Greatest one-day snowfall: T (9-07-01)
Maximum snow depth at midnight: 0
Days with measureable pcpn: 6 Year: 57
Days with pcpn 1.00"+: 3 Year: 8
Days with measureable snowfall: 0 Year: 1
Days with snowfall 1"+: 0 Year: 1
Days with glaze ice: 0 Year: 5
Days with damaging wind: 1 Year: 11
Days with hail: 1 Year: 3
Days with thunderstorms: 6 Year: 46
Days with fog: 2 Year: 15
NOTICE: All temperatures are in degrees Fahrenheit and all precipitation values in inches. Snowfall totals denoted by an asterisk indicate hail.
Summary....Central Oklahoma spent the month of Sep 2001 alternating between week-long spells of warm, humid, and stormy weather and cool, calm, and dry weather. The first week of the month was especially stormy as thunderstorms struck the area on four separate days. Severe weather affected much of the region on the 7th. A large rotating thunderstorm with a stacked plate appearance developed late that afternoon northwest of Oklahoma City. As afternoon turned to evening a line of thunderstorms filled in to its south all the way to the Red River. This line of thunderstorms hit Norman just before 8pm, turning the sky a sickly shade of orange-yellow, producing continuous lightning, and dropping nickel sized hail. Other strong thunderstorms hit the area during the early morning hours on the 18th and 20th with extremely heavy rain. The weather during the final week of the month was especially pleasant with little in the way of cloud cover, wind, or humidity.
Turlock CA had .24 inch of rain during Sep 2001 - all of which fell during an exceptionally long-duration lightning display the night of the 24th-25th. The total for the 2001-02 seaon is .31 inch, which is well above average for this early in the season.