Storms have already developed in the Hills of western South Dakota this afternoon. Some of these storms will become strong to severe with large hail being the main threat. I expect a lot of these storms to die out as they move east, away from the Hills. Skies will be dry elsewhere for the remainder of the afternoon and evening.
As we go through the overnight, scattered showers and storms will be possible in western, central, and northeast South Dakota. Lows will fall to the sixties.
A cold front will move through KELOLAND Saturday and Saturday night. This front will spark scattered showers and storms for western, central, and northeast KELOLAND during the afternoon. As the front moves into southeast South Dakota later in the day (after 7:00 pm), scattered showers and storms will be likely. Highs on Saturday will range from the upper eighties in Aberdeen and Rapid City to the lower nineties in Pierre and Sioux Falls.
The cold front will be through all of KELOLAND by Sunday, which means north/northwest winds will help usher in cooler temperatures. Highs on Sunday will be near eighty in eastern South Dakota to the low/middle eighties in central and western KELOLAND. The cooler temps will continue into Labor Day with mostly sunny skies, but temperatures will warm back to the eighties for eastern South Dakota by Tuesday.