January 2008 Climatic Summary

January temperatures were near normal, averaging 1 degree below normal to 1 degree above normal. Lemmon was the warm spot averaging 1.7 degrees above normal. The cold spot was Wright 12W in northeast Wyoming where temperatures averaged 4.5 degrees below normal.
Precipitation in January was 10 to 20 percent above normal. The wettest areas were across the northern Black Hills, Bear Lodge mountains and the plains of northeast Wyoming where precipitation averaged 150 to 250 percent of normal. The driest areas were across northwestern and southwestern South Dakota where precipitation was 60 to 80 percent of normal. The wet spot was in Martin where precipitation was 280 percent of normal, while Bison was the dry spot with only 11 percent of normal precipitation. The precipitation surplus for the month averaged 0.08 inches.
Snowfall in January was 10 to 20 percent above normal.  Snowfall averaged 2 to 4 feet across the northern Black Hills and Bear Lodge mountains.  On the northeast Wyoming plains snow averaged 10 to 20 inches with 5 to 10 inches on the plains of western South Dakota and in the southern and central Black Hills.

January storm summary...

On January 3 and 4 a strong pressure gradient develop over northeast Wyoming and far western South Dakota producing winds of 50 to 70 miles per hour...with a peak gust of 91 miles per hour 5 miles west of Spearfish.

On January 7 a weak storm system brought 1 to 2 inches of snow to northeast Wyoming and the northern Black Hills.

On January 14 and 15 an upper level storm system brought 1 to 3 inches of snow to northeast Wyoming and 4 to 8 inches in the northern Black Hills and Bear Lodge mountains. This storm also produced winds of 40 to 60 miles per hour over the plains of northwest South Dakota.

On January 16 and 17 another upper level storm system brought 2 to 4 inches of snow to northeast Wyoming and 8 to 16 inches to the northern Black Hills and Bear Lodge mountains.

On January 20 and 21 a storm system brought 4 to 8 inches of snow to northeast Wyoming and 3 to 6 inches of snow to the western South Dakota plains and southern and central Black Hills, while 8 to 15 inches fell in the northern Black Hills.

On January 27 a strong pressure gradient developed across western South Dakota bringing high winds to the region. Winds of 50 to 70 miles per hour were reported on the northern and eastern foothills and across the plains of western South Dakota mainly north of I-90. A maximum wind gust of 95 miles per hour was reported 7 miles southwest of Hermosa.

LOCAL EXTREMES

Temperature Data Rapid City   Lead   Gillette  
  Temperature Date Temperature Date Temperature  Date
Maximum Temperature 57 degrees 4th 51 degrees 3rd 49 degrees 5th
Minimum Temperature -17 degrees 22nd -9 degrees 22nd -12 degrees 29th
             
Precipitation Data Rapid City   Lead   Gillette  
Monthly  Data Amount Data Amount Date Amount Date
Precipitation 0.34 inches   2.10 inches   0.57 inches  
Snowfall 4.3 inches   49.0 inches   11.6 inches  
             
Daily Data            
Maximum Precipitation 0.26 inches 20th 0.44 inches 18th 0.13 inches 20th
Maximum Snowfall 2.6 inches 20th 11.4 inches 18th 3.0 inches 18th,  20th

REGIONAL EXTREMES

Temperature Data   Western South Dakota     Northeastern Wyoming  
  Temperature Site Date Temperature Site Date
Maximum Temperature 59 degrees Ft. Meade 5th 55 degrees Colony 4th,  5th
Minimum Temperature -26 degrees Antelope Range 29th -29 degrees Upton 14ENE 22nd
             
Precipitation Data   Western South Dakota     Northeastern Wyoming  
Monthly Data Amount Site Date Amount Site Date
Maximum Precipitation 2.10 inches Lead   1.36 inches Devil's Tower  
Minimum Precipitation 0.04 inches Lodgepole  5SW   0.48 inches Sundance  
Maximum Snowfall 49.0 inches Lead   20.3 inches Sundance  
Minimum Snowfall 0.5 inches Bison   9.0 inches Hulett,  Upton  
             
Daily Data            
Maximum Precipitation 0.44 inches Lead 18th 0.32 inches Dillinger 18th
Maximum Snowfall 11.4 inches Lead 18th 6.0 inches
6.0 inches
Sundance Upton 14 ENE 17th
18th

MONTHLY RECORDS

LOCATION DATE NEW RECORD OLD RECORD  DATE
    NO RECORDS SET    


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