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Ground-to-cloud lightning: A lightning bolt in which the original stroke jumps upward from some object on the ground (usually from tall structures); the opposite of more common cloud-to-ground discharges.
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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.
