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Fox News Weather Center

Strong Storms to Spread From Denver to Detroit on Sunday

A disturbance that brought severe storms to the Upper Midwest on Saturday will shift eastward and trigger more severe thunderstorms as the weekend comes to a close.

According to AccuWeather Meteorologist Maggie Samuhel, "A warm, moist air mass ahead of an approaching surface cold front will lead to thunderstorm development this afternoon. The atmosphere will be unstable enough for storms to turn severe."

Spotty thunderstorm activity is expected to occur across eastern Colorado and into Kansas.

More widespread thunderstorms are expected to develop into a squall line from Missouri to Michigan. Wind gusts over 65 mph will be possible.

"A squall line is expected to develop from northeastern Illinois to northern Missouri and shift southeastward into Sunday night," Samuhel said.

The main threats with these storms will be large hail, damaging winds and flash flooding. An isolated tornado, however, cannot be ruled out.

Locations within the risk for strong storms include Grand Rapids and Kalamazoo, Michigan; Fort Wayne and Indianapolis, Indiana; Chicago and Springfield, Illinois; St. Louis and Kansas City, Missouri; Wichita and Lawrence, Kansas; and Denver and Aurora, Colorado.

According to AccuWeather Meteorologist Michael Doll, "Rainfall rates with these storms can exceed 2 inches an hour and lead to flash flooding."

Travel will become dangerous at times for more than a 1,100 mile stretch of Interstate 70 from Denver to the Indiana/Ohio border.

Slow travel is also expected across interstates 35, 57, 65, 80, 90, and 94 at times.

The arrival of thunderstorms could cause delays for those heading to and from major league baseball games this afternoon in Chicago, Kansas City and Denver.

Power outages will be possible during or after the passage of a thunderstorm.

Anyone with outdoor activities should be alert for changing weather conditions and seek shelter when a storm approaches.

People heading to the airport should call ahead to check on the progress of your flight as there is the possibility for flight delays.

Keep up to date on changing weather conditions by using Accuweather Minutecast®. Get minute-by-minute precipitation information by entering your current address.

When thunder roars, go indoors. If you can hear thunder, you are close enough to be struck by lightning.

Remember to never drive through a flooded roadway. Less than a foot of water can wash away your vehicle.

As the cold front shifts eastward to begin next week, severe storms will threaten areas from Tennessee to Pennsylvania.

Stay tuned to AccuWeather for continuous updates on the severe weather.