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Flooding, large hail possible in Wyoming; chance for storms Thursday through Independence Day


CASPER, Wyo. — Areas of Wyoming could see thunderstorms starting Thursday, with a chance for storms to continue over the Independence Day weekend and into the middle of next week, according to forecasts from National Weather Service offices in Riverton and Cheyenne.

Rain showers are expected in southeast Wyoming on Thursday, with 50–55 mph wind gusts possible, the NWS in Cheyenne forecasts. Storms are expected to become widespread in this region in the afternoon and evening, with heavy downpours, localized flooding and lightning possible, particularly along the I-80 corridor.

Storms are also possible Thursday in western and central Wyoming and could lead to locally heavy rainfall, minor flooding and strong winds, particularly in Sweetwater County, according to the NWS in Riverton.

Strong to severe storms could occur in east central Wyoming and the Nebraska Panhandle from Friday through Wednesday. These storms could produce large hail up to an inch in diameter as well as 60 mph wind gusts, according to the NWS in Cheyenne.

Western and central Wyoming could also see thunderstorms Friday through Sunday afternoon, with storms most likely in the afternoon and evening hours, according to the NWS in Riverton. South central and southeast Wyoming could see scattered showers and thunderstorms continue through Wednesday, according to the NWS in Cheyenne.

Casper has a 40% chance of precipitation on Thursday and Friday, with heavy rain and strong winds possible, according to the NWS in Riverton. Casper Mountain has a 50% chance for precipitation Thursday and Friday.

Casper and Casper Mountain’s chances for showers and thunderstorms are 30% on Saturday, dropping to 20% on Sunday and on Independence Day, according to the NWS in Riverton.

Further forecast information is available from the NWS in Riverton.