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Drop: A liquid particle (such as a raindrop), with shape maintained by a balance between the drop’s surface tension and air drag when the drop is falling through the atmosphere at its maximum fall speed (that is, at its terminal velocity).
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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.
