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Dust devil: A small, vigorous, short-duration whirlwind, made visible by dust or other debris carried aloft; up to 100 feet in diameter, average height 600 feet. Winds are clockwise or counterclockwise.
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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.
