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Alberta clippers: Fast-moving wintertime low pressure systems that sweep southeast from Alberta, Canada, across the northern Great Plains and Midwest of the United States. They usually bring a few inches of snow but, when intense, can produce blizzards.
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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.
