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Cornice: An overhanging structure of snow formed along the top of a mountain or ridge by wind-driven deposition of snow. Cornices are extremely hazardous to mountain climbers and can initiate avalanches. Also, overhanging snow on roofs, window ledges, etc., of buildings.
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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.
