Severe Thunderstorm Watches issued as storms produce damaging winds, hail across Midwest

A fast-moving storm system will blast across the Midwest this weekend in what forecasters are calling the largest severe weather event in at least two weeks.

Meteorologists predict that the combination of instability and humidity will be enough for thunderstorms to break out in the late afternoon and evening.

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The heat triggered severe weather, and it was already happening early Saturday in Chicago, where the storms brought high winds, hail and two tornadoes.

The National Weather Service confirmed both tornadoes on Saturday. An EF-0 hit a Naperville mall and another EF-0 landed in Crest Hill before moving to Joliet.

“Some heat continues to build over parts of the Central Plains and Upper Midwest,” FOX Weather meteorologist Amy Freeze said. “Some of that heat can trigger downpours and thunderstorms.”

A tornado warning was issued for northwest Will County and South Central Cook County in Illinois until 6:30 a.m. The NWS Chicago reports that a confirmed tornado was located above Romeoville, northwest of Chicago, just before 6 a.m. CT, moving southeast at 40 mph.

Severe weather threat Saturday

Severe thunderstorm watches have been issued for parts of the Midwest ahead of the ongoing severe storms.

Forecast models show that daytime heating will help many areas reach 90 degrees before storms hit in the afternoon and evening.

Severe weather threat Saturday

“We have a storm system moving in and we have a very likely risk of severe weather from Minneapolis, La Cross to Wausau, Wisconsin,” FOX Weather meteorologist Jane Minar said. “But the threat stretches across much of Minnesota, Wisconsin, all the way into northern Iowa and Illinois.”

Severe weather Saturday: threat of hail

WE HAVE ENTERED AMERICA’S MOST ACTIVE PERIOD FOR ADVERSE WINDS FROM SEVERE THUNDERSTORMS

The threat is expected to progress in the Great Lakes region overnight from Saturday to Sunday.

Showers and thunderstorms are expected to begin to decrease in intensity as they evolve into a more stable environment and the system moves into southern Canada.

Severe Weather Ingredients

The rear front will help trigger showers and thunderstorms Sunday from the northeast into the Ohio and Missouri valleys.

Meteorologists believe the severe weather ingredients will not be as favorable as Saturday, but there will be enough moisture and instability to produce strong to severe scattered storms.

The Storm Prediction Center has highlighted an area from near Kansas City to upstate New York for the possibility of seeing damaging wind gusts and hail.

Severe Weather Threat: Sunday

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