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Intergelisol: A subsurface layer of frozen ground that might persist for a few years but is not permanently frozen ground and is not considered to be permafrost (soil and rock whose temperature is permanently at or below 32(degrees) F); also known as pereletok.
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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.
