DECEMBER 2005 CLIMATIC SUMMARY

Bitter cold temperatures and light snow dominated the first eight days of December, with temperatures averaging 18 to 22 degrees below normal. An upper level ridge built into the region from the 9th through the 14th with mild temperatures and dry weather. Another brief round of Arctic air arrived for the 15th through the 19th, with upslope snows in the northern Black Hills and Bear Lodge Mountains dropping 8 to 20 inches of snow. Dry weather and mild temperatures returned on the 20th and dominated until the 29th. A strong upper level storm brought snow and colder temperatures for the last 3 days of the month, with 6 to 9 inches of snow falling in the northern Black Hills and 3 to 6 inches in northwestern South Dakota.

Temperatures in December averaged out to near normal. Lemmon was the hot spot averaging 2.9 degrees above normal; Wood was the cold spot averaging 5.1 degrees below normal.

Overall, precipitation was 10 to 30 percent above normal. Northeastern Wyoming, the northern Black Hills and northwestern South Dakota saw 50 to 100 percent of normal precipitation, while the southern and central Black Hills and southwestern South Dakota received only 20 to 50 percent of normal precipitation. Hot Springs was the dry spot receiving only 16 percent of its normal precipitation, while Wood was the wet spot receiving 235 percent of normal precipitation.

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

60 degrees

22nd, 26th

55 degrees

25th

59 degrees

25th

Minimum Temperature

-11 degrees

8th

-12 degress

7th

-26 degrees

7th 

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly  Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

0.19 inches

 

2.38 inches

 

0.94 inches

 

Snowfall

5.4 inches

 

33.9 inches

 

5.4 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.11 inches

29th

0.58 inches

29th

0.50 inches

14th

Maximum Snowfall

1.5 inches

2nd

9.8 inches

14th

4.0 inches

4th

REGIONAL EXTREMES

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

66 degrees

Buffalo Gap

26th

60 degrees

Gillette

19th

Minimum Temperature

-28 degrees

Hoover

8th

-27 degrees

 Devil's Tower

7th

 

 

 

 

-27 degrees

Upton 14 ENE

7th, 8th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

2.38 inches

Lead

 

1.49 inches

Sundance

 

Minimum Precipitation

0.05 inches

Hereford 12 SW

 

0.28 inches

Moorcroft

 

Maximum Snowfall

33.9 inches

Lead

 

38.1 inches

Sundance

 

Minimum Snowfall

Trace

Hot Springs

 

1.5 inches

Colony

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.80 inches

Bison

29th

0.50 inches

Gillette

14th

Maximum Snowfall

9.8 inches

Lead

14th

12.0 inches

Sundance

15th

MONTHLY RECORDS

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

Sundance, Wyoming

12/15/2005

12.0 inches snowfall

12.0 inches

12/28/2003

 

 

 

12.0 inches

12/13/1916

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