WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.

One of the towering cumulonimbus clouds behind Thursday's storms

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Walt Stagner sends us this backside view of one of the cumulonimbus clouds which produced Thursday evening's storms. He took this from Yorkville in Chicago's southwest suburbs 30 minutes after the storm have passed by. Thanks Walt!

Tom Skilling

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Photo courtesy of Walt Stagner, Yorkville, Illinois