No. I've just seen this before. Models juice up last minute and LWX has to play catch up for the northwest crew. We have a front, fresh air mass, and a low riding along it. Classic 4th quarter snow win.
It honestly wouldn't shock me to see a late upgrade to a Winter Storm Warning for the NW suburbs. I think everyone reels this in, with the usual suspects getting a late boom.
Mesonet site in Clarksville shows 2 inch soil temps down to 34 degrees. Expect this to continue dropping today. Our Easton site shows a temp of 32 degrees at 2 inch soil depth. Expect the roads to get bad today.