April temperatures were below normal, averaging 1 to 3 degrees below normal. All locations reported below normal temperatures. Long Valley was the warm spot averaging 0.4 degrees below normal. The cold spots were in Winner and Custer, both averaging 4.5 degrees below normal.
Precipitation in April was 20 to 30 percent below normal. The driest areas were across the plains of northeast Wyoming where precipitation averaged 40 to 60 percent of normal, and in southwestern South Dakota and the southern Black Hills were precipitation was 60 to 80 percent of normal. Across the northern and central Black Hills, the Bear Lodge Mountains and on the western South Dakota plains, precipitation was near normal. The wet spot was at Mission 14S where precipitation was 183 percent of normal, while Newell was the dry spot with only 28 percent of normal precipitation. The precipitation deficit for the month averaged 0.44 inches.
Snowfall in April was 15 to 25 percent above normal. Snowfall averaged 2 to 3 feet across the northern Black Hills and Bear Lodge mountains. On the northeast Wyoming plains snow averaged 4 to 8 inches with 6 to 12 inches on the plains of western South Dakota and in the southern and central Black Hills.
April storm summary...
On April 5 and 6 and upper level low pressure system moved across the central portions of western South Dakota bringing a narrow band of 8 to 14 inches of snow to northern Butte and northern Meade counties. Elsewhere in northwest South Dakota, the northern Black Hills, the Bear Lodge Mountains and northern portions of Crook and Campbell counties in northeast Wyoming, 4 to 8 inches of snow fell. Elsewhere precipitation was light with little or no snow.
On April 10 and 11 a powerful upper level storm system moved through the central plains and brought 1 to 2 inches of precipitation to western South Dakota and portions of northeast Wyoming ...with heavy snow falling in some areas. The northern Black Hills and Bear Lodge mountains saw 9 to 15 inches of snow with 8 to 14 inches of snow over south central South Dakota. Elsewhere on the plains of western South Dakota snowfall was 1 to 4 inches with little or no snow across the plains of northeast Wyoming.
On April 23 an upper level disturbance brought severe weather to southwestern and south central South Dakota. Large hail fell with these storms, ranging in size from pennies to golf balls.
|Temperature Data||Rapid City||Lead||Gillette|
|Maximum Temperature||85 degrees||15th||71 degrees||15th, 29th||77 degrees||29th|
|Minimum Temperature||10 degrees||1st||10 degrees||1st||8 degrees||1st|
|Precipitation Data||Rapid City||Lead||Gillette|
|Precipitation||1.38 inches||3.47 inches||0.91 inches|
|Snowfall||5.2 inches||34.8 inches||7.4 inches|
|Maximum Precipitation||0.52 inches||11th||0.85 inches||11th||0.52 inches||10th|
|Maximum Snowfall||2.2 inches||7th||8.0 inches||11th||3.5 inches||10th|
|Temperature Data||Western South Dakota||Northeastern Wyoming|
|Maximum Temperature||91 degrees||Midland||15th|| 81 degrees
|Devils Tower Newcastle||15th 10th|
|Minimum Temperature||-3 degrees||Hill City||1st||5 degrees||Dillinger||1st|
|Precipitation Data||Western South Dakota||Northeastern Wyoming|
|Maximum Precipitation||3.89 inches||Mission 14S||1.98 inches||Hulett|
|Minimum Precipitation||0.47 inches||Newell||0.58 inches||Dillinger|
|Maximum Snowfall||34.8 inches||Lead||12.0 inches||Upton 14ENE|
|Minimum Snowfall||0.6 inches||Cottonwood 2E||2.0 inches||Devils Tower|
|Maximum Precipitation||1.98 inches||Mission 14S||24th||0.52 inches 0.52 inches||Colony Gillette 4SE||5th 10th|
|Maximum Snowfall||14.0 inches||Hoover||6th||5.0 inches||Rockypoint 1N||6th|
|LOCATION||DATE||NEW RECORD||OLD RECORD||DATE|
|Faith||04/06/2008||12.8 inches snowfall||11.2 inches snowfall||04/18/1970|