I keep thinking back to January 2019, the week of the extreme cold from the displaced polar vortex and remember a system that had what would normally be a garbage track for Chicago surprise us with an all snow front end thump. I believe we got 3 or 4" in the city. It warmed up above freezing and we had drizzle the rest of the day and then the arctic front eventually made it through the area the next day or so?
Anyhow, this reminds me of that somewhat. Not necessary the atmospheric setup, but the heavy wet snow preceding the arctic blast.