National Weather Service United States Department of Commerce

Showers and thunderstorms will increase in coverage later this afternoon through tonight. A few severe storms will be possible with golf ball sized hail and wind gusts to 70 mph the main threats. Otherwise heat and humidity build back into the area with the hottest days Thursday through Saturday.
Thunderstorms should develop in central SD late this afternoon and move east through the evening and overnight hours. The main threats will be hail to the size of golf balls and wind gusts to 70 mph. A very isolated tornado will also be possible during the evening.