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Sea ice annual minimum: The least amount of sea ice in the Northern Hemisphere occurs in September. It’s a balance between the rate of ice melt (now decreasing) and new ice formation (now increasing).
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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.
