1987: Six tornadoes touched down in central South Dakota. Five of theses tornadoes touched down in Lyman county, including three which did damage near Kennebec within 25 minutes of each other. One of the tornadoes destroyed three farms, downing outbuildings, power lines, granaries, and killing farm animals.

2000: A wet microburst with winds estimated at 120 mph caused heavy damage in and around Mitchell. Apartments and several mobile homes were destroyed, vehicles were overturned, and other damage occurred to buildings and vehicles. Widespread tree and power line damage also occurred. Ten people were injured, although the majority of the injuries were minor. The damage path was approximately a mile and a half long and a mile wide, extending over the southwest part of Mitchell.

1980: Hurricane Allen reached Category Five status for the first of three times during its long path across the Atlantic with a pressure of 911 millibars while south of Puerto Rico.

1987: Severe thunderstorms raked eastern South Dakota where a dozen tornadoes were reported along with softball size hail at Bowdle and wind gusts to 90 mph at Watertown. Three tornadoes struck within 25 minutes of each other near Kennebec.