November 2010 Climatic Summary

November temperatures were near normal, averaging 0.5 degrees below normal to 0.5 degrees above normal. Mission 14S was the warm spot averaging 1.6 degrees above normal. Devils Tower in northeast Wyoming was the cold spot averaging 3.0 degrees below normal. Two all-time November temperature records were set. At Cottonwood 2E the temperature fell to -23 degrees on the 23rd, breaking the previous record of -22 degrees set on November 20th in 1940. At Spearfish the temperature hit 79 degrees on the 6th, breaking the old record of 78 set on November 7, 2010, November 11, 2005 and November 8, 1999.
Precipitation in November averaged 94 percent of normal. The wettest areas were across the Bear Lodge Mountains and plains of northeast Wyoming where precipitation averaged 150 to 200 percent of normal. The driest areas were across south central South Dakota where precipitation was 25 to 40 percent of normal. The wet spot was at Hulett in northeast Wyoming, where precipitation was 228 percent of normal. Winner was the dry spot with only 24 percent of normal precipitation. The precipitation deficit for the month averaged 0.03 inches.
November was a snowy month with 160 to 180 percent of normal snowfall. Across the northern Black Hills and Bear Lodge Mountains 2 to 4 feet of snow fell. The southern and central Black Hills saw less than 6 inches of snow. Across the plains of northeast Wyoming 8 to 16 inches of snow fell. On the western South Dakota plains snowfall ranged from 10 to 20 inches over northwestern areas to less than 6 inches across south central and southwest South Dakota.
 

November storm summary...

On November 9…An upper level disturbance produced a narrow band of heavy snow over central Crook County where 12 to 17 inches fell. The heaviest snow reported was 17 inches 11 miles south of Hulett. Elsewhere…1 to 3 inches of snow fell over Campbell and Weston Counties and over the northern Black Hills.
 
On November 16…A weak upper level disturbance brought 2 to 4 inches of snow to southwest South Dakota and the Black Hills. Elsewhere, little or no snow was reported.
 
On November 18…Strong downslope winds of 60 to 80 mph were reported in the Spearfish area. The strongest wind gust reported was 80 mph 5 miles west of Spearfish.
 
On November 22…An upper level storm system brought widespread snow to the region. On the northeast Wyoming plains snowfall averaged 3 to 8 inches, with Osage and Upton reporting 10 inches each. On the South Dakota plains snowfall averaged 2 to 6 inches, with Shadehill Reservoir reporting 7.2 inches.
 
On November 29…A strong upper level storm system produced heavy upslope snows across the northern Black Hills and Bear Lodge Mountains with widespread lighter snows over the plains of northeast Wyoming and far western South Dakota. Snowfall of 20 to 30 inches was reported in the northern Black Hills and Bear Lodge Mountains, with Lead reporting 29.6 inches and Deadwood 2NE 18.9 inches. Across the northern foothills 6 to 12 inches of snow fell, with the plains of northeast Wyoming and northwest South Dakota averaging 2 to 4 inches of snow.

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

79 degrees

6th

70 degrees

6th

75 degrees

6th

Minimum Temperature

-11 degrees

23rd

-6 degrees

24th

-15 degrees

23rd

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

0.42 inches

 

2.22 inches

 

1.10 inches

 

Snowfall

7.6 inches

 

44.3 inches

 

13.1 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.17 inches

21st

0.89 inches

29th

0.40 inches

22nd

Maximum Snowfall

5.8 inches

22nd

29.4 inches

29th

6.0 inches

22nd

REGIONAL EXTREMES 

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

85 degrees

Wasta

7th

76 degrees

Several Locations

6th, 7th

Minimum Temperature

-23 degrees

Cottonwood Hoover

23rd
23rd

-17 degrees

Dillinger

23rd

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

2.22 inches

Lead

 

1.94 inches

Upton 14ENE

 

Minimum Precipitation

0.16 inches

Mission

 

24.5 inches

Hulett

 

Maximum Snowfall

44.3 inches

Lead

 

 

 

 

Minimum Snowfall

1.5 inches

Winner

 

 

 

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.89 inches

Lead

29th

1.13 inches

Devils Tower

10th

Maximum Snowfall

29.4 inches

Lead

29th

15.0 inches

Hulett

10th

MONTHLY RECORDS 

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

Devils Tower, WY

11/10/2010

10.0 inches of snowfall

7.0 inches of snowfall

11/10/1978

Cottonwood 2E

November

-23 degree temperature

-22 degree temperature

1940

Spearfish

November

79 degree temperature

78 degree temperature

1999, 2005, 2010

 
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