Getting your Trinity Audio player ready...
Cyclogenesis: The first appearance of a low-pressure system or lowpressure trough in the atmosphere, or the strengthening of an existing low or trough; the opposite of cyclolysis.
———-
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.
