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Cloud height: The height of the base of a cloud or cloud layer above the ground. For cumulonimbus (the thunderhead), it’s about 3,000 feet, whereas its top can extend to 65,000 feet.
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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.
