So why are we still thinking a big snowstorm may happen?
The President's Day Snowstorm of 1979 (President's Day I)
The President's Day Storm of 1979 came during the flip from a La Nina to an El Nino. If that same situation happens with this winter, it is entirely possible that several snowstorm could hit the East US. A flip in the middle of winter is not something that goes by without notice. The entire atmosphere is in a turbulent phase, more than the polar vortex.
In conclusion, while short, we still believe a major snowstorm is possible, depending on, among many other variables, the ENSO conditions. Remember- patience is key; I see the recent Midwest snowstorm to be a very good sign that winter is getting in gear.