Scattered showers and thunderstorms have developed west of Sioux Falls this morning. Some of the downpours near and just west of the James Valley have been locally heavy with around an 1” or more with the heaviest rain. We’ll continue to track scattered rain through the day, with the best chances west of the I-29 corridor. Highs will be in the upper 70s in Sioux Falls, with 80s likely to the west. In fact, a few 90s are possible in western South Dakota.
Showers and t-storms are expected tonight, with the best chances in the Black Hills region where a flash flood watch has been issued. Chances of rain will range 40%-60% from Pierre to Rapid City.
Scattered rain is also expected in the Sioux Falls to Aberdeen area tonight and tomorrow, with a better chances by tomorrow night. A slow-moving area of low pressure will trigger the rain as it passes through KELOLAND. Locally heavy rain is possible, a trend worth watching.
Scattered rain is possible both Saturday and Sunday, about a 20-30% chance for most areas. Chances of rain are higher in central KELOLAND on Saturday.
A larger system should affect KELOLAND once again by Sunday night into Monday. This will bring better chances of rain again to many areas. It also looks warmer next week with higher humidity…just in time for the start of school for many.