The GFS basically has three chances for some snow back to back, to back with very cold air filtering in with each system. We haven't had that in years here.
The details are not important at this point but the big picture of having the low with cold air and the setup looks really good for this time frame. But don't be surprised to see the models have some wilds jumps from run to run.
One thing is that there is a lot of energy flying around so the models are going to be playing catch-up especially this week. Don't live or die by one model run or you will hate this hobby...