August 2010 Climatic Summary

August temperatures were warm, averaging 1 to 3 degrees above normal. Cottonwood was the warm spot averaging 3.9 degrees above normal. The cold spot was at Colony in northeast Wyoming where temperatures averaged 0.4 degrees below normal.
Precipitation in August was near normal. The wettest areas were across the northern Campbell County and Crook counties in northeast Wyoming, the northern Black Hills and over northwest South Dakota where precipitation averaged 150 to 200 percent of normal. The driest areas were across southern Campbell County and Weston County in northeast Wyoming, and southwestern and south central South Dakota where only 40 to 80 percent of normal precipitation fell. The wet spot was at Cole Canyon in the Bear Lodge Mountains where precipitation was 213 percent of normal. Newcastle in northeast Wyoming was the dry spot with only 9 percent of normal precipitation. The precipitation surplus for the month averaged 0.01 inches.
No snowfall was reported in August.

August storm summary...

On August 1…An isolated severe thunderstorm late in the afternoon produced quarter size hail 5 miles northwest of Custer in Custer County. During the evening hours scattered thunderstorms produced 60 mph winds near New Haven, Hulett and Aladdin in Crook County and 75 mph winds near Faith in Meade County. The thunderstorms also produced heavy rains of 1 to 3 inches across Crook County, causing small stream flooding which continued into August 2nd.
 
On August 2…An isolated severe thunderstorm produced half dollar size hail near Rockerville in Pennington County. Another severe thunderstorm produced 70 mph winds at Long Valley in Jackson County and 60 mph winds near Rosebud in Todd County.
 
On August 3…A strong upper level disturbance moved across the region producing large hail, damaging winds, heavy rains and an isolated tornado. A small and brief tornado was reported 15 miles southeast of Gillette in Campbell County. There were numerous reports of large hail. The largest hail reported was the size of golf balls in Lead and Central City. Reports of damaging winds of 60 to 70 mph were widespread. The strongest wind gusts reported were 80 mph near Silver City in Pennington County, and 79 mph in Edgemont in Fall River County. Heavy rains caused flash flooding over the northern Black Hills and foothills with widespread minor street flooding and small stream flooding across western South Dakota. Four inches of rain in two hours caused widespread street flooding in Lead and Deadwood. Minor street flooding was also reported in Rapid City, Belle Fourche, Sturgis, Hot Springs, and Custer. Small stream flooding and ponding of water in low lying areas was common throughout western South Dakota from the heavy rain.
 
On August 4…An isolated severe thunderstorm produced 58 mph winds 25 miles southwest of Gillette in southwestern Campbell County.
 
On August 6…An isolated severe thunderstorm produced 60 mph winds 7 miles east of Redig in Harding County.
 
On August 9…Scattered severe thunderstorms produced winds in excess of 60 mph across Fall River, Custer and Shannon counties. The strongest wind gusts reported were 65 mph near Buffalo Gap in Custer County and 63 mph near Ardmore in Fall River County. The thunderstorms also produced heavy rains of 2 to 3 inches causing minor flooding of small streams and low lying areas in Fall River, Custer and Shannon Counties.
 
On August 11…An isolated severe thunderstorm in south central South Dakota produced 70 mph winds near Wood in Mellette County and quarter size hail near Witten in Tripp County. Another severe thunderstorm moved across northern Harding and Perkins counties producing numerous reports of 60 mph winds from Buffalo in Harding County to Lemmon in Perkins County.
 
On August 12…A strong upper level disturbance produced widespread severe weather across Crook and northern Campbell counties in northeast Wyoming and across northwest South Dakota. There were numerous reports of winds of 60 to 70 mph and hail the size of quarters and larger. The strongest wind gusts reported were 80 mph, 17 miles northeast of New Haven in Crook County and 71 mph at Buffalo in Harding County. The largest hail reported was 2 inches in diameter near Colony in Crook County.
 
On August 16…Strong thunderstorms produced heavy rains of 2 to 3 inches causing minor flooding of small streams and low lying areas of Fall River, Custer and Shannon Counties
 
On August 17…An isolated severe thunderstorm produced half dollar size hail in downtown Rapid City.
 
On August 29…An isolated severe thunderstorm produced 60 mph winds 5 miles southwest of Camp Crook in Harding County.

  

 LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

102 degrees

22nd, 27th

93 degrees

22nd

100 degrees

22nd

Minimum Temperature

46 degrees

24th

43 degrees

30th, 31st

41 degrees

24th

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

1.33 inches

 

2.24 inches

 

2.33 inches

 

Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.93 inches

3rd

1.86 inches

3rd

0.84 inches

3rd

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

110 degrees

Midland

27th

105 degrees

Colony

22nd

Minimum Temperature

36 degrees

Lodgepole 5SW

25th

36 degrees

Upton 14 ENE

24th, 25th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

4.45 inches

Bear Ridge

 

2.33 inches

Gillette 4SE

 

Minimum Precipitation

0.27 inches

Edgemont 23NW

 

0.16 inches

Newcastle

 

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

Minimum Snowfall

0.0 inches

 

 

0.0 inches

 

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

2.78 inches

Bear Ridge

4th

1.48 inches

Sundance

3rd

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 


MONTHLY RECORDS

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

 

 

NO RECORDS SET

 

 

  

Return to Climate Summaries


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.