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Tree leaves and rain: When tree leaves curl up or turn upside down, it means rain. There is some truth to this: High humidity can cause leaves to curl, and shifting thunderstorm winds can flip leaves over.
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Tom Skilling is chief meteorologist at WGN-TV. His forecasts can be seen Monday through Friday on WGN-TV News at noon and 9 p.m.
WGN-TV meteorologists Steve Kahn, Richard Koeneman and Paul Dailey plus weather producer Bill Snyder contribute to this page.
