The National Weather Service said snow is expected starting late Monday into Tuesday and total accumulations of 2-3 inches are possible in parts of Lake and McHenry counties.
The National Weather Service (NWS) said snow is on track to start late Monday and Tuesday morning in the northern Illinois area.
Some light accumulations are expected, primarily on elevated and untreated surfaces, which will lead to slick conditions.
The slick conditions could lead to increased travel challenges during the Tuesday morning commute.
The NWS said snow will begin between 2-4 a.m. Tuesday favored south of Interstate 80 and between 4-7 a.m. south of Interstate 90.
Snow will begin between 6-9 a.m. for far northeast Illinois.
A burst of briefly heavier snow is possible for areas south of Interstate 80 as the snow starts, the NWS said.
The snow will continue Tuesday afternoon and evening with rates easing south of Interstate 80.
Bursts of steadier snow will continue north of Interstate 80/90 and away from the lake through the day Tuesday.
Warming temperatures should limit main road accumulations but slippery travel will continue to be a threat, the NWS said.
Parts of Lake and McHenry counties could see 2-3 inches of snow while parts of Lake County could see less than an inch.