Getting your Trinity Audio player ready...
Acid snow: Generally, any snow with a pH less than 5.6. Principal causes are the combining of snowflakes with sulfur dioxide, nitrous oxides and carbon dioxide–the byproducts of burning fossil fuels.
———-
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.
