Today is going to be hot and humid. High temperatures will range from the upper 80s to low 90s with the dew point hovering somewhere in the upper 60s. That will take the heat index into the mid to upper 90s this afternoon.
A powerful cold front is rolling into the very northwestern corner of South Dakota this morning. That front will blast across the Dakotas and into Iowa and Minnesota late today and tonight, bringing good chance of showers and thunderstorms. Storms will develop across central and northern South Dakota late this afternoon into this evening and move east through the night. Our latest models are suggesting that storms will approach the Sioux Falls area by mid to late evening. Some storms could be severe with large hail and damaging straight-line wind gusts being the main threat. The tornado threat is relatively low however, an isolated tornado or two is possible. Timing on storms could change, so stay with me throughout the day for updates. Some places could get heavy rain. One-half inch to an inch or more is possible through tomorrow night.
Tomorrow will be mostly cloudy and cooler with scattered showers and thunderstorms likely. The best chance of severe weather tomorrow will be across Nebraska, Iowa and south central to southeastern Minnesota.
The rain should be out of here by the weekend. Saturday and Sunday will be partly cloudy to mostly sunny and quite a bit cooler. Highs will only reach the upper 60s to low 70s on Saturday, warming to the mid 70s on Sunday. The cooler weather will not last long, we will bounce back into the 80s by Monday and stay there through most of next week.