National Weather Service United States Department of Commerce

A 30-70% chance of showers over central South Dakota overnight tonight will linger into Friday morning. A few rumbles of thunder over north central South Dakota. Winds will increase out of the southeast on Friday, gusting 20-35 mph, with the strongest winds west of the Missouri River.
Above normal temperatures will return this weekend with widespread readings in the 80s and 90s. The combination of these hot temps and high humidity values will increase the danger of heat related illnesses. Heat risk values will increase into Moderate to Major values over portions of eastern South Dakota and western Minnesota. Moderate affects those who are sensitive to heat, especially those without cooling/hydration. Major affects anyone without cooling/hydration.