Both the 0z NAM and RGEM are better than 12z. I wouldn't get too worried yet.
Edit: The NAM isn't better than 12z necessarily, but it isn't worse. I'm talking NE Illinois only.
Not in DuPage County. The brunt of the precip will be heavy snow. Once it lightens up, there could conceivably be some drizzle, but most of the qpf has already fallen by that time.
There is definitely an increase in QPF across Missouri across both versions of the NAM and the 3K paints a relative QPF minima over central Indiana. I don't have time to delve into it more deeply than that right now. Just something to watch.
I don't think the gap in QPF makes a lot of sense. Would like to see the other models 12z runs to see if this is clearly an outlier or if there is a trend among all of the models.