A string of hot days continues today, even as a cold front begins to move south across our area. We’ve also been tracking some spotty thunderstorms early on this morning. There’s a little low pressure center near Norfolk, Nebraska that’s the trigger we need for this activity.
There’s also a dominant ridge of heat down over Kansas. That’s kept the heat trapped overhead AND is the cause for the isolated chances of rain we’re following for the next few days. These storms are spinning clockwise around the northern fringe of this and will keep doing so until Monday-Tuesday. That’s when the next big cold front moves into our area.
Most of the lightning this morning is just to the south of Sioux Falls, now east of I-29 and pushing into Iowa. Even if you don’t see rain, you’ll probably hear the thunder early on today. We don’t expect a washout by any means for all of the outdoor activity going on around Sioux Falls. There will be some reduced pockets of visibility, though. Besides the storms, the unseasonably warm temperatures are the big focus of the weekend forecast.
Strong to severe storms are possible late this afternoon in the NW. These will spread SE later in the evening. They should close in on Pierre late, probably closer to midnight. Hail and wind are the primary issues. These should fade by early tomorrow morning before reaching Sioux Falls.
Tomorrow will be very warm. We’re watching the chance of stronger, late storms in the NE corner tomorrow afternoon and evening. Monday should be quite warm in Sioux Falls but others should be cooler. Tuesday through Thursday should be very mild and we’ll have lots of sunshine.