It's been a record-setting day for heat and drought today. Rapid City hit 100, besting the prior record of 99. Pierre got to 104! Sioux Falls now owns a new record for the driest summer months (June, July, August). That beats a record dating back to 1894.
Overnight, the first of two waves of rain arrives. We'll stay breezy and warm, so a few severe thunderstorms are possible. Most areas will not see rain, however.
Tomorrow, even after a front passes, we really won't see a big cool-down. Most will be right around 95 for a high, although Pierre and central South Dakota will be hotter. The southeast breeze won't be quite as strong. More showers try to push from west to east but there is not much moisture to power anything more than ligh rains.
On Labor Day, we'll still be about 90. We could get a few storms but it won't be a wash-out for outdoor plans.
A cold front starts passing through on Tuesday that could bring a few late showers to the west. The better chance of showers will be in the east on Wednesday as the front comes in. The best moisture totals seem to favor southeastern KELOLAND. That's also when we'll see cooler temperatures.