Monthly Climatological Summary Norman 3SE, Cleveland Co., OK (Lat 35^10'57"N, Lon 97^25'27"W, elev 1130) September 2001 ------------------------------------------------------------------ Temperature Precipitation Snow AM PM Max Min Water Snow Depth Wx Wx ------------------------------------------------------------------ 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 ------------------------------------------------------------------ Means and Totals for September 2001 ------------------------------------------------------------------ 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.