August 2006 Climatic Summary

The month of August was cool on the first day of the month, but warmer weather and an active severe weather pattern developed from August 2 through 17. Nearly daily afternoon and evening thunderstorms occurred during this stretch with severe thunderstorms occurring in northeastern Wyoming on August 6. Severe thunderstorms were reported in the Black Hills and western South Dakota on August 7 and 8. On August 9 through 11 severe thunderstorms were reported across south central South Dakota. On August 14 and 15 severe thunderstorms occurred over northeastern Wyoming and the Black Hills. After a break from the severe weather on August 16 and 17, severe thunderstorms were again reported in northeastern Wyoming and northwestern South Dakota on August 18, and on the plains of western South Dakota on August 20 and 22. The weather was hot and dry on August 23 and 24, with cooler temperatures returning to the region on August 25 and continuing through the end of the month. Temperatures averaged 1 to 2 degrees above normal in August. Averages ranged from 5.8 degrees above normal at Camp Crook to 2.2 degrees below normal at Mount Rushmore.

Rainfall was near normal in August in northeastern Wyoming and well above normal over much of western South Dakota. In northeastern Wyoming rainfall was 80 to 100 percent of normal, while in western South Dakota rainfall was 140 to 180 percent of normal. Precipitation ranged from 272 percent of normal at Wood to 43 percent of normal at Colony in northeastern Wyoming. 

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

98 degrees

11th

93 degrees

11th

97 degrees

22nd

Minimum Temperature

50 degrees

29th

46 degrees

19th, 28th, 31st

45 degrees 

31st

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly  Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

3.37 inches

 

1.96 inches

 

1.59 inche

 

Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

1.67 inches

7th

0.75 inches

27th

1.00 inches

13th

Maximum Snowfall

0.0 inches

 

0.0 inhces

 

0.0 inches

 

REGIONAL EXTREMES

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

107 degrees

Cottonwood 2 E

24th

100 degrees  

Colony       Weston 1 E

9th, 23rd       23rd 

Minimum Temperature

34 degrees

Medicine Mtn

29th

34 degrees

Dillinger

19th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

5.95 inches

Hermosa

 

3.06 inches

Upton 14 ENE

 

Minimum Precipitation

0.76 inches

Maurine 10 SW

 

0.53 inches

Colony

 

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

Minimum Snowfall

0.0 inches

 

 

0.0 inches

 

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

4.00 inches

Hermosa

9th

1.29 inches

Devils Tower

8th

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

MONTHLY RECORDS

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

 

 

NO RECORDS SET

 

 

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