Getting your Trinity Audio player ready...
Air pressure: The force exerted per unit area by the weight of the atmosphere. The weight of a “column” of air extending to the top of the atmosphere. At sea level, air pressure is 14.7 pounds per square inch.
———-
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.
