January 2010 Climatic Summary

January temperatures varied quite a bit across the region in January. Across northeast Wyoming and the Black Hills temperatures were 3 to 5 degrees above normal, while on the plains of western South Dakota temperatures averaged 1 to 3 degrees below normal.  Gillette 4SE in northeast Wyoming was the warm spot averaging 5.9 degrees above normal. The cold spot was in Winner where temperatures averaged 3.9 degrees below normal.
Precipitation in January averaged 20 to 30 percent below normal. The wettest areas were across south central South Dakota and in the Bear Lodge Mountains of northeast Wyoming, where precipitation was 30 to 60 percent above normal. The driest area was across northwestern South Dakota where precipitation was 25 to 50 percent of normal. The wet spot was at Mission, where precipitation was 269 percent of normal. Edgemont was the dry spot with only 2 percent of normal precipitation. The precipitation deficit for the month averaged 0.12 inches.

Snowfall was near normal across the region in January. Across the northern Black Hills and Bear Lodge Mountains 1 to 2 feet of snow fell. Elsewhere, on the plains of western South Dakota and northeast Wyoming, snowfall was generally 4 to 9 inches.

January storm summary...

On January 6…A strong arctic cold front and associated upper level disturbance brought 3 to5 inches of snow to western South Dakota and the Bear Lodge Mountains with 1 to 3 inches of snow on the plains of northeast Wyoming.

On January 24 and 25…An upper level storm system brought 8 to 15 inches of upslope snows to the northern Black Hills and Bear Lodge Mountains. Accumulations on the plains of northeast Wyoming and western South Dakota were generally 1 to 3 inches.

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

56 degrees

16th

58 degrees

12th

51 degrees

20th

Minimum Temperature

-18 degrees

8th

-13 degrees

7th

-13 degrees

8th

 

 

 

 

 

 

 

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly  Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

0.20 inches

 

0.98 inches

 

0.08 inches

 

Snowfall

2.7 inches

 

20.9 inches

 

1.1 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.11 inches

6th

0.48 inches

24th

0.06 inches

6th

Maximum Snowfall

1.5 inches

6th

12.0 inches

24th

1.0 inches

6th

 
REGIONAL EXTREMES 

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

64 degrees

Deadwood 2NE
Johnson Siding

12th                  13th

58 degrees

Sundance

13th

Minimum Temperature

-32 degrees

Hoover
Oral

8th

-35 degrees

Devils Tower

7th

 

 

 

 

 

 

 

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

1.57 inches

Mission

 

1.28 inches

Devils Tower

 

Minimum Precipitation

0.01 inches

Edgemont

 

0.06 inches

Wright 12W

 

Maximum Snowfall

20.9 inches

Lead

 

16.0 inches

Upton 14ENE

 

Minimum Snowfall

0.5 inches

Edgemont

 

1.1 inches

Gillette 4SE

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.76 inches

Mission

7th

1.00 inches

Devils Tower

25th

Maximum Snowfall

12.0 inches

Lead

24th

9.0 inches

Devils Tower
Upton 14ENE

25th


MONTHLY RECORDS 

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

Devils Tower, WY

01/25/2010

1.00 inches precipitation

0.54 inches precipitation

01/21/1986

Devils Tower, WY

01/25/2010

9.0 inches snowfall

6.3 inches snowfall

01/21/1986

 
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