October 2008 Climatic Summary

 October temperatures were near normal, averaging 1 degree below normal to 1 degree above normal. Gillette 4SE in northeast Wyoming was the warm spot averaging 1.0 degrees above normal. The cold spot was in Faith where temperatures averaged 2.0 degrees below normal.
Precipitation in October was 5 to 15 percent above normal. The wettest areas were across northwestern South Dakota where precipitation averaged 150 to 190 percent of normal. The driest areas were across southwestern South Dakota and the southern Black Hills where precipitation was 55 to 75 percent of normal. The wet spot was at Shadehill Reservoir where precipitation was 192 percent of normal, while Devils Tower in northeast Wyoming was the dry spot with only 51 percent of normal precipitation. The precipitation surplus for the month averaged 0.15 inches.
Snowfall in October was confined to northeast Wyoming…the Black Hills and far northwest South Dakota. In northeast Wyoming 8 to 14 inches of snow fell...while the northern and central Black Hills saw 6 to 12 inches...with 3 to 7 inches over portions of Butte and Harding counties.
 
 
October storm summary...
 
On October 4 through 6, a weak upper level trough moved across the region bringing light rain to the area. Across northeast Wyoming 0.15 to 0.25 inches of rainfall was recorded with western South Dakota receiving 0.10 inches or less.
 
On October 9 through 12, a strong upper level low pressure system moved across central Wyoming bringing 1 to 2 inches of precipitation to northeast Wyoming and western South Dakota. It was cold enough for snow to fall across northeast Wyoming...the Black Hills and portions of northwest South Dakota. In northeast Wyoming 8 to 14 inches of snow fell...while the northern and central Black Hills saw 6 to 12 inches...with 3 to 7 inches over portions of Butte and Harding counties.
 
On October 21 a cold front moved across northeast Wyoming and western South Dakota. This system brought 0.20 to 0.30 inches of precipitation and a trace of snow to the northern Black Hills, with a trace to 0.15 inches of precipitation to the plains of northeast Wyoming and western South Dakota.
 
On October 26 a cold front moved across northeast Wyoming and western South Dakota. This system brought 1 to 2 inches of snow to the northern Black Hills, with mainly dry weather on the plains of northeast Wyoming and western South Dakota.

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

80 degrees

18th

75 degrees

4th

82 degress

2nd

Minimum Temperature

16 degrees

27th

20 degrees

13th, 23rd

14 degrees

27th

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

1.47 inches

 

1.94 inches

 

1.75 inches

 

Snowfall

Trace

 

13.6 inches

 

11.1 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.46 inches

12th

0.91 inches

10th

0.60 inches

12th

Maximum Snowfall

Trace

11th, 12th, 26th

6.0 inches

10th

8.0 inches

12th

REGIONAL EXTREMES

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

83 degrees

Several Locations

Several Dates

82 degrees
82 degrees

Gillette 4SE
Newcastle

2nd
3rd

Minimum Temperature

8 degrees

Ladner 9SW

28th

10 degrees

Upton 14ENE

27th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

2.89 inches

Spearfish

 

2.11 inches

Upton 14ENE

 

Minimum Precipitation

 

 

 

0.79 inches

Devils Tower

 

Maximum Snowfall

13.6 inches

Lead

 

15.0 inches

Weston 1E

 

Minimum Snowfall

0.0 inches

Several Locations

 

Trace

Newcastle

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

1.68 inches

Spearfish

10th

1.30 inches

Upton 14ENE

10th

Maximum Snowfall

6.6 inches

Deadwood 2NE

10th

12.0 inches

Weston 1E

12th

MONTHLY EXTREMES

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

 

 

NO RECORDS SET

 

 

 
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