Summer turns to winter overnight as rain flips over to snow by Friday morning. We will see a lull in precipitation after 12AM as the low-pressure system passes directly overhead. This will result in some light drizzle as temperatures remain in the 40s through 3-4AM for most.
After 4AM, the low pressure will continue to slide out of the area, flipping things over to a mix or snow by early Friday morning. Some of these snow showers may be steady to heavy at times, with the highest coverage Northwest of Rockford. Snow will begin winding down after 12PM, eventually drying out by the afternoon.
Steadiest snow will remain mostly North and West of Rockford, where a few spots in Southwestern Wisconsin and far Northwestern Illinois may be able to pick up a couple inches of slushy accumulation mostly on grassy and elevated surfaces. A winter weather advisory is in place for Green County in Wisconsin and Jo Daviess County in Illinois through the early afternoon.
These snow showers will come with a strong wind. West/Northwest gusts may approach 45 mph at times Friday morning into the early afternoon. Any snow coming down during this time will significantly limit visibility and allow for some blowing and drifting concerns. A wind advisory will go into effect across all of Northern Illinois at 6AM and through the afternoon.
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