The northern tier of Illinois is bracing for a rapid turn to winter from November 28 to 30, when Arctic air moves across the Great Lakes, causing lake-effect snow and brutal cold through the Black Friday weekend. Heavy snow showers could cause hazardous travel conditions in the Chicago area and further west toward Rockford.
According to the National Weather Service office in Chicago, there is a moderate danger of heavy snow in far northern Illinois as strong northwest winds draw moisture from Lake Michigan from late Friday into Saturday. The heaviest snowfall is forecast near the lakefront and in McHenry and Lake County, with localized totals of 4–8 inches likely. Wind gusts of up to 35 mph may result in limited visibility, drifting snow, and hazardous wind chills.
According to the Illinois Department of Transportation, travel along I-90, I-94, and I-88 may become problematic, especially late Friday and early Saturday. Drivers should prepare for shifting weather, slippery bridges, and delays on important highways in Chicago and the suburbs. Air travelers may also see de-icing delays at O’Hare and Midway.
Temperatures will stay well below normal through early next week, with highs in the 20s, lows in the 30s, and nighttime lows in the teens. Residents should prepare their vehicles for cold weather travel and spend as little time outside as possible during the harshest months.
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