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Overnight snow blankets much of northern Illinois; accumulations range from 1 to 3.6 inches

National Weather Service map shows snowfall totals from the snowstorm that began late Saturday night and continued into Sunday morning, Jan. 23, 2022.

The snow that began falling late Saturday night and continued into the early morning hours Sunday left accumulations ranging between 1 and 3.6 inches in much of the northern Illinois region, according to the National Weather Service.

The NWS data shows the heaviest accumulations were in Lake and McHenry counties and portions of western Cook, northeast DuPage, and northern Boone, Winnebago, Stephenson and Jo Daviess counties at the Wisconsin border.

For Sunday, the NWS has issued a hazardous weather outlook for portions of northeast Illinois and northwest Indiana.

Lake effect snow is possible across far eastern Cook and far eastern Will counties this morning and then into northwest Indiana this afternoon. Additional snowfall of 1 to 3 inches is possible, according to the NWS.

Light snow is expected to spread across much of the area late this evening and into early Monday morning.