December 2010 Climatic Summary

December saw above normal temperatures across northeast Wyoming, the Black Hills and southwest South Dakota, while below normal temperatures were found over the central and northwest plains of South Dakota. The warmest area was over the higher elevations of the Black Hills where temperatures were 4 to 7 degrees above normal. The coldest area was over northwest South Dakota where temperatures averaged 3 to 5 degrees below normal.  Sundance in northeast Wyoming was the warm spot averaging 3.7 degrees above normal. The cold spot was in Faith where temperatures averaged 5.1 degrees below normal.
Precipitation in December averaged 40 to 60 percent above normal. The wettest areas were from southwest South Dakota northeast into central South Dakota where precipitation averaged 200 to 250 percent of normal. The driest areas were from the Bear Lodge Mountains and northern foothills into northwestern South Dakota where precipitation was 70 to 90 percent of normal. The wet spot was at Interior 3NE where precipitation was 319 percent of normal. Sundance in northeast Wyoming was the dry spot with only 45 percent of normal precipitation. The precipitation surplus for the month averaged 0.20 inches.
Snowfall was heaviest across the Black Hills and Bear Lodge Mountains where 1 to 2 feet of snow fell. On the plains of northeast Wyoming and western South Dakota snowfall averaged 6 to 12 inches.

December storm summary...

On December 10…an upper level disturbance brought 4 to 8 inches of snow to the northern Black Hills and Bear Lodge Mountains.

On December 30 and 31…a strong upper level low pressure system moved through the Central Plains bringing widespread snow to the region. The heaviest snows fell in south central South Dakota and the Black Hills where 8 to 12 inches was reported. Elsewhere on the South Dakota plains 4 to 8 inches of snow fell. Across the northeast Wyoming plains 5 to 10 inches of snow fell.

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

54 degrees

29th

57 degrees

26th

47 degrees

13th

Minimum Temperature

0 degrees

31st

-9 degrees

31st

-5 degrees

18th, 31st

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

0.61 inches

 

1.72 inches

 

0.75 inches

 

Snowfall

4.8 inches

 

22.1 inches

 

6.7 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.17 inches

31st

0.62 inches

10th

0.33 inches

31st

Maximum Snowfall

1.7 inches

31st

7.6 inches 

10th

3.5 inches

30th


REGIONAL EXTREMES

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

61 degrees

Deadwood 2NE

26th

49 degrees

Hulett
Wright 12W

27th
14th

Minimum Temperature

-14 degees

Hoover

22nd, 23rd

-12 degrees

Wright 12W

18th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

1.72 inches

Lead

 

1.13 inches

Devils Tower

 

Minimum Precipitation

0.25 inches

Ladner 9SW

 

0.33 inches

Sundance

 

Maximum Snowfall

22.1 inches

Lead

 

15.5 inches

Sundance

 

Minimum Snowfall

4.0 inches

Ladner 9SW
Mission

 

4.4 inches

Newcastle

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.62 inches

Lead

10th

0.65 inches

Weston 1E

30th

Maximum Snowfall

12.0 inches

Winner

31st

10.0 inches 

Weston 1E

30th


MONTHLY RECORDS

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

Winner

12/31/2010

12.0 inches of snowfall

11.0 inches of snowfall

12/25/1964

Winner

12/31/2010

1.10 inches of precipitation

0.85 inches of precipitation

12/10/1989

 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.