National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

May 19-20, 2011 Heavy Rain across Western South Dakota and Northeastern Wyoming

A slow moving storm system produced two to four inches of heavy rain over the Black Hills and western South Dakota.  The rainfall began during the early morning hours of May 19 and continued through the moring of May 20. Rainfall amounts of two to four inches were common across the area, with the heaviest precipitation along the eastern slopes of the Black Hills. In the higher elevations of the Black Hills, several inches of snow fell mainly above 5000 ft. Up to a foot of snow was reported in the Deerfield area. A generalized graphic of the rainfall amounts is displayed below as well as individual precipitation amounts received by the National Weather Service in Rapid City.

Return to Weather Gallery