The center of low pressure was just northeast of Milwaukee moving into Lake Michigan at 9PM this evening. The associated cold front extended south-southwest out of the low through Chicago’s western suburbs on southwest to St. Louis, MO. The front will continue to track east through the metro area in the next few hours. Ahead and along the front temperatures will be in the middle 40s with strong southerly winds gusting to 40 mph and steady rain. As the front moves east of a given point, winds will shift to the west-northwest, still gusting 30 to 40 mph, temperatures will fall back through the 30s into the 20s and rain will change over to a wet snow. Any accumulations are expected to be less than an inch.
At 9PM rain had changed over to a wet snow in Freeport, Rockford, Rochelle, DeKalb, and Peru where temperatures were in the lower 30s – readings had dropped into the middle to upper 30s in Huntley, Aurora, West Chicago, Joliet, Morris and Romeoville and winds had shifted to the west-northwest.