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Saffir-Simpson scale: A hurricane intensity scale relating hurricane damage to wind speed and central air pressure. Category 1: winds 74-95 m.p.h; 2: 96-110; 3: 111-130; 4: 131-155; 5: over 155.
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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.
