CHICAGO (AP) -- A springtime winter snow storm is moving across northern Illinois, canceling flights and causing slick road conditions.
The National Weather Service says a winter storm advisory is in effect until early tomorrow. The storm system is expected to dump as much as nine inches of heavy, wet snow across portions of the state. Forecasters says the snow could fall at a rate of an inch or two per hour.
The Chicago Department of Aviation says airlines are proactively canceling flights.
Delays at O'Hare International Airport are averaging 45 to 60 minutes and 250 flights have been canceled.
Across town at Midway International Airport, delays are about 30 minutes and ten flights have been canceled.