...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST MONDAY NIGHT... ...Mixed precipitation with heavy snow possible Monday. Additional snow accumulations of 2 to 5 inches and ice accumulations of up to one tenth of an inch. ...Portions of central, east central and northeast Missouri and south central, southwest and west central Illinois. ...Until midnight CST Monday night. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning or evening commute. ...Snowfall rates could exceed 1 inch per hour at times on Monday. Sub freezing temperatures will aid in the accumulation of ice tonight and the rapid accumulation of snow on Monday, especially on untreated roads, bridges, and overpasses.