SEPTEMBER 2005 CLIMATIC SUMMARY

Warm and dry conditions dominated the weather through the first 11 days of the month. A weak cold front brought scattered showers and thunderstorms and seasonal temperatures for the 12th through the 15th. After several mild days, cooler temperatures and scattered showers returned to the region from the 21st through the 27th, with warmer temperatures returning over the last two days of the month.

Temperatures average 3 to 6 degrees above normal, with all locations reporting above normal temperatures. Winner was the hot spot averaging 6.4 degrees above normal, while Colony, Wyoming was the cool spot averaging 1.9 degrees above normal.

It was a very dry month with all locations reporting below normal precipitation. In most areas precipitation was 40 to 60 percent below normal. Hot Springs was the dry spot receiving only 26 percent of its normal precipitation, while Pactola Dam was the wet spot receiving 98 percent of its normal precipitation.

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

98 degrees

3rd 

90 degrees

3rd 

95 degrees

3rd  

Minimum Temperature

36 degrees

28th and 29th 

32 degrees

28th  

37 degrees

18th  

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly  Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

0.56 inches

 

1.50 inches

 

0.42 inches

 

Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.20 inches

24th 

0.40 inches

12th

0.22 inches

24th 

Maximum Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 

REGIONAL EXTREMES

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

106 degrees

Cottonwood

4th 

101 degrees

Colony

3rd

Plainview

4th 

Minimum Temperature

23 degrees

Deerfield Lake

21st

27 degrees

Moorcroft

29th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

1.80 inches

Winner

 

0.97 inches

Upton 14ENE

 

Minimum Precipitation

0.35 inches

Hot Springs

 

0.50 inches

Dillinger

 

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

Minimum Snowfall

0.0 inches

 

 

0.0 inches

 

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

1.08 inches

Harrington

24th

0.69 inches

Echeta 

13th

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

MONTHLY RECORDS

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

 

 

NO RECORDS SET

 

 

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