Storms cause flight delays and cancellations
Periods of heavy snow are expected throughout the evening. Much of the Chicago area can expect to see two to four inches of snow by Friday morning. Areas North and West can expect to see six inches of snow.
Read more at http://wgntv.com/2012/12/20/winter-storm-may-bring-up-to-6-of-snow/#Cg4ymuHt2IciS5PD.99