CHICAGO — The Chicago National Weather Service Forecast Office has a Winter Weather Advisory (purple-shaded area on maps above) for a wintry mix of freezing rain, sleet and snow in effect for the portion of the Chicago area north of Interstate-80 until 9AM CST this Tuesday morning. The wintry mix may change over to all snow later this morning and continue this afternoon before ending from the west this evening, so this combined with northeast to north winds gusting to 30 miles per hour could continue the possibility of slick hazardous roads and untreated surfaces across the Chicago area much of the daylight hours. Total snow accumulations will likely range from around 2 to as much as 4-inches far northern portions along the Illinois-Wisconsin state line to an inch or less along the Interstate-80 corridor. Conditions for those outside today will be very slick and hazardous, so take your time and be alert for icy conditions.
A Winter Weather Advisory will be in effect farther north and east across Wisconsin (2 to 4-inches of snow), the northern tier of Indiana Counties for freezing rain, sleet and up to 4-inches of snow, and much of Lower Michigan for heavy snow. A Winter Storm Warning (pink-shaded area on map above) for 5 to 10-inches of heavy wet snow will be in effect for central Lower Michigan today into the overnight hours tonight.
As the center of low pressure tracks through central Illinois into Indiana today, the wintry mix of freezing rain, sleet and snow will lay out to the north and move slowly east with the low pressure. Precipitation, mainly in the form of light snow will gradually end from the west later this afternoon into the evening hours across the Chicago area, but persist well into the overnight hours farther east in Indiana and Lower Michigan.