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Dangerous heat to continue through Monday

Few strong to severe thunderstorms possible west tonight and for everyone Monday
Published: Jun. 18, 2022 at 7:27 AM CDT|Updated: Jun. 19, 2022 at 3:18 PM CDT
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SIOUX FALLS, S.D. (Dakota News Now) -- A heat wave will continue to impact the region through Monday and along with that, a cold front will bring a chance for showers and thunderstorms, some of which may turn severe.

A HEAT ADVISORY has been issued for the entire area with an EXCESSIVE HEAT WARNING for Brown, Spink, Grant, Marshall and Roberts counties. All heat alerts will continue through sunset for everyone tonight, and until Monday night for the eastern counties. The combination of temperatures in the 90s and 100s and dewpoints in the 60s to near 70 will allow heat index values to reach triple digits and could be as high as 105 to 110 degrees. There won’t be much relief overnight Sunday, with lows only forecasted to fall down into the 70s to near 80.

As far as the weather itself goes, we will have a clear to partly cloudy sky through midday Monday. A few thunderstorms could develop Sunday afternoon and evening in central and western South Dakota. The Storm Prediction Center has outlined a level one risk for severe thunderstorms west of a Leola to Harrold to Mission line with a risk for thunderstorms as far east as Webster, Huron and Mitchell. Widely scattered to isolated showers and thunderstorms are expected to develop Monday afternoon and evening for everyone ahead a cold front. The Storm Prediction Center now has a level two slight risk in place for areas along and west of a line from Canby to Brookings to Yankton with a level one risk east of there.

By Tuesday, temperatures return to more seasonable levels heading along with a break from the humidity, but that will be short-lived as temperatures look to return back into the 90s heading towards the end of the week into next weekend with muggy conditions as well.

Chances for showers and thunderstorms will return late in the week heading into next weekend, but look to remain isolated to widely scattered at best.

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