According to The Weather Channel, forecasters said the storm could deliver more than a foot of snow to the Windy City, leading to poor visibility and whiteout conditions in some areas.
The Illinois Department of Transportation reported snow and ice across the state from Bloomington northward, leaving Interstate highways more like danger zones. Poor driving conditions were seen on most roadways in the region, including interstates 80, 55 and 74, according to the Associated Press.
Meterologists say the snow will be followed by very cold weather in the Chicago area, thanks to a push of Arctic air expected to drop downtown temperatures to around zero later tonight, with an even colder forecast for the suburbs.
The Chicago area has not been hit with a winter storm of this extent since January 1999, when 21 inches of snow invaded the city.
Rain-slicked roadways turned to perilous stretches of ice in Oklahoma early Monday. Rain hit northeastern Oklahoma yesterday, coating roadways with ice early this morning after temperatures quickly dropped because of a blast of cold air from the North.
Oklahoma Highway Patrol troopers were called to between 200 and 250 accidents in the area surrounding Tulsa this morning. They say problems were particularly bad on Interstate 44, but said there were no major injuries.