Hail and Damaging Winds in South Dakota, June 21 to 22, 2015

The second windstorm in a few days occurred from the evening of June 21st to the morning of June 22nd. Some of the same areas hit by the June 19th and 20th event were impacted once again. The first bout came from a bowing line of storms in south central North Dakota that moved southeast and affected parts of northeast South Dakota with damaging winds over 60 mph along with large hail up to baseball size.

The main event occurred later on as severe storms in western South Dakota moved east at around 60 mph and morphed into a severe windstorm. By early in the morning, the line entered into western Stanley county and produced a wind gust up to 122 mph near Hayes. One person was injured here as a camper rolled. An office building was also moved and grain bins were destroyed. The windstorm continued to move quickly east and reached Pierre and Fort Pierre at around 3 am CDT. Major widespread damage occurred in both cities with winds gusting to over 80 mph. Countless trees were downed, a mobile home and semi trucks were flipped, a grain silo was destroyed, along with several buildings damaged. Also, power poles were snapped and lines were downed across parts of the area leaving many people without power for several days. Winds as high as 70 mph continued for some time after the storm's passage in Pierre. The storms then went on to the east and southeast producing more wind damage to structures and trees.