August 2012 Climatic Summary
 
August temperatures were near to slightly above average across the area this month. The average monthly temperature was 0.6 degrees above normal across the region. The location with the highest departure in August was Custer, with an average temperature of 3.9 degrees above normal. Newell had the coolest departure, at 1.1 degrees below average.
 
Precipitation in August averaged only 47 percent of normal across the entire area. The only locations that had near normal precipitation were Lemmon, Cottonwood, and Pactola Dam. On the dry end of the spectrum, Newcastle recorded 0.10 inches of rain, which was only 8 percent of average.
 
August significant storm summary...
 
August 2nd – An area of low pressure moved through the Northern Plains, producing severe thunderstorms from northeastern Wyoming through the Black Hills and across the South Dakota plains. Quarter to ping pong ball sized hail and wind gusts from 60 to 90 mph were reported from near Devil’s Tower, across the Black Hills, to Kadoka and Mission.

August 11th – A weak cold front moved through eastern Wyoming and western South Dakota during the afternoon. Strong to severe storms developed in the afternoon and brought dime to quarter sized hail and wind gusts of 60 to 70 mph to portions of southwest South Dakota.

 

LOCAL EXTREMES
Rapid City
Lead
Gillette
Temperature
Temperature
Date
Temperature
Date
Temperature
Date
Max. Temp.
106
29th
94
29th
102
29th
Min. Temp.
51
16th
40
16th
39
25th
Precipitation
Rapid City
Lead
Gillette
Monthly Data
Amount
Date
Amount
Date
Amount
Date
Precipitation
0.38
 
2.27
 
0.39
 
Snowfall
0.0
 
0.0
 
0.0
 
Daily Data
Amount
Date
Amount
Date
Amount
Date
Max. Precipitation
0.27
11th
1.32
11th
0.34
11th
Max. Snowfall
0.0
 
0.0
 
0.0
 

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