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Barchan: A crescent-shaped dune or drift of windblown sand or snow. Conditions under which barchans form are a moderate supply of material (sand or snow), and winds of almost constant direction and of moderate strength; also spelled “barchane” and “barkhan.”
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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.
