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Mariners’ 1-2-3 rule of thumb: The average forecast errors of hurricane positions are up to 100, 200 and 300 miles, respectively, at 24 hours ahead, 48 hours and 72 hours (i.e., one day, two days and three days).
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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.
