National Weather Service United States Department of Commerce

Accumulating snow will spread across northern Illinois late this evening and overnight. A narrow band of locally heavier snow is expected to develop roughly around the I-88 corridor, where snowfall rates may exceed 1 inch per hour for several hours. Closer to the Wisconsin line and especially south of I-80, snowfall rates will quickly diminish. Most of the accumulating snow is expected to taper off by around sunrise.
Accumulating snow will move into the area after 9 PM tonight and persist into Sunday morning. A wintry mix remains possible south of a Pontiac to Fowler line. Be prepared for hazardous travel tonight if out and about!
Here is an approximate timeline of when accumulating snow is expected to begin tonight. Note rain/freezing rain may mix in with snow across portions of Livingston, Ford, Iroquois, Kankakee, and Benton Counties overnight, but temperatures are expected to be near 31-33 degrees, limiting icing impacts.
Our period of wintry weather will continue through next week with several chances for precipitation including rain and snow. While temperatures will start off on the chilly side, they do look to moderate towards the middle of next week.