March 2011 Climatic Summary

March temperatures averaged 2 to 3 degrees below normal region wide, but varied widely. Temperatures ranged from 5 to 8 degrees below normal across northwest, central and south central South Dakota, to 1 to 3 degrees above normal on the plains of northeast Wyoming and in northern foothills. In the higher elevations of the Black Hills temperatures averaged 3 to 6 degrees above normal. Gillette 4SE in northeast Wyoming was the warm spot averaging 2.8 degrees above normal. The cold spot was in Dupree where temperatures averaged 8.6 degrees below normal.
Precipitation in March was slightly below normal region wide. The wettest areas were across Weston and southern Campbell counties in northeast Wyoming where precipitation averaged 150 to 200 percent of normal. The driest area was across far northwestern South Dakota where precipitation was 30 to 40 percent of normal. The wet spot was at Hoover, where precipitation was 371 percent of normal. Lodgepole 5SW was the dry spot with only 28 percent of normal precipitation. The precipitation deficit for the month averaged 0.08 inches.
Snowfall in March averaged 20 to 30 percent above normal. Across the northern Black Hills and Bear Lodge Mountains 18 to 36 inches of snow fell. Elsewhere, on the plains of northeast Wyoming and western South Dakota, and in the southern and central Black Hills, snowfall averaged 8 to 14 inches.

March Storm Summary...

March 11…A strong cold front moved across the region bringing northwest winds of 35 to 45 mph with gusts in excess of 60 mph to northeast Wyoming and western South Dakota.  The strongest wind gust in northeast Wyoming was 76 mph, 2 miles northeast of Echeta. In South Dakota the strongest wind gust was 71 mph, 5 miles west of Spearfish.

March 26…A strong upper level disturbance brought 4 to 8 inches of snow to northwest South Dakota. Elsewhere across western South Dakota and over northeast Wyoming 1 to 3 inches of snow fell.


LOCAL EXTREMES Rapid City Lead Gillette
Temperature Temperature Date Temperature Date Temperature Date
Max. Temp. 71 degrees 16th 58 degrees 19th, 20th 65 degrees 19th
Min. Temp. -8 degrees 2nd 5 degrees 7th 0 degrees 7th
Precipitation Rapid City Lead Gillette
Monthly Data Amount Date Amount Date Amount Date
Precipitation 0.92 inches   1.52 inches   0.82 inches  
Snowfall 16.9 inches   17.0 inches   3.6 inches  
Daily Data Amount Date Amount Date Amount Date
Max. Precipitation 0.21 inches 26th 0.35 inches 23rd 0.30 inches 31st
Max. Snowfall 6.6 inches 26th 6.3 inches 8th 2.0 inches 4th
REGIONAL EXTREMES Western South Dakota Northeast Wyoming
Temperature Temperature Site Date Temperature Site Date
Max. Temp. 79 degrees Winner 17th 67 degrees Colony 19th
Min. Temp. -15 degrees Lodgepole 5SSW 2nd -5 degrees Dillinger 7th
Precipitation Western South Dakota Northeast Wyoming
Monthly Data Amount Site Date Amount Site Date
Max. Precipitation 2.89 inches Hoover   1.58 inches Sundance  
Min. Precipitation 0.31 inches Ludlow 3SSE   0.41 inches Colony  
Max. Snowfall 18.5 inches Hoover   12.8 inches Upton 14ENE  
Min. Snowfall 3.0 inches Harding 3SE   3.6 inches Gillette 4SE  
Daily Data Amount Site Date Amount Site Date
Max. Precipitation 10.0 inches Newell 28th 0.52 inches Upton   4th
Max. Snowfall 0.82 inches Hoover 17th 7.0 inches Upton 4th

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