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World’s highest air pressure: 32.06 inches of mercury at Tosontsengel, Mongolia, at 2 a.m. on Dec. 19, 2001. The temperature at the time was -41(degrees)F, and 2 inches of snow covered the ground.
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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.
