Thunderstorm Wind in Stanley County, South Dakota

Widespread, slow moving thunderstorms brought hail, gusty wnds and heavy rain to portions of central South Dakota on the afternoon and evening of August 21st. Hail to the size of tennis balls was observed by a trained spotter 4 miles northwest of Murdo. A peak wind speed of 65 mph was observed at a weather station 13 miles north northwest of Sansarc while the ASOS in Pierre peaked at 59 mph. Emergency management and trained spotters estimated about 3.5 inches of rainfall associated with the storms in portions of Jones and Hyde counties which resulted in water over a few roads.