So looking at this storm though, in the grander context of this winter, this storm system to me seems like it wasn't the result of any one weather pattern but more "luck" of the draw (ha).
Fast flow, no real over-whelming signal for a low to track where it did but earlier in the winter several of these did about the same thing as this one, but those tracked from like HFD to BOS or PWM.
The storms we had up here this winter were very similar to that one down there, fast moving omega QPF bombs...maybe without the 850mb fronto....but widespread 8-16" NNE snows in 18 hours or so.
But this same storm has occurred at least 2 or 3 times so far this winter, just like 50-100 miles north AND also down in D.C. They aren't "big dogs" from a mid-level look but they are just juiced fast movers. Maybe that's the luck part...fast flow energy ejecting out of the southern Plains and ripping along in the flow...unmanned firehose just spraying the energy up near New England.
This time SNE got the track needed.