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

Storm clouds build over Chicago's north side 4:30 pm Tuesday (July 28)

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David Skrzyniarz sends us this great shot of building cumulonimbus clouds (thunderheads) he took from Chicago's north side at 4:30 p.m. Tuesday evening (7/28).  THANKS David!. 

-Tom Skilling
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Photo courtesy of David Skrzyniarz