NWS Quad Cities Area Forecast Discussion:
The Quad Cities NWS office is mentioning how the models are moving south with this system, which would indeed bring snow to cities like Chicago that have just been introduced to winter. We have noticed this southward shift in the ensembles as well.
The first image is what the Hydrometeorological Prediction Center, or the HPC is saying right now. The 4 inches part is at max right now, but of course subject to major changes.
Here's what may happen if the models continue shifting south:
We will continue to closely monitor the ensembles, as it is getting interesting seeing as this event is a mere 3-4 days away.