NYC is smack in the middle of basically the most northern and southern modeling at the moment... heavier wetter snow storm or slightly colder less intense storm. Either way it probably ends up 6-8 inches by either cutting the clown map output on a warmer wetter storm or keeping it closer to 10-1 for a colder drier storm. It's north or south from the city that actually looks like the tough forecast for a change. .
Not the way to look at it. 20.3 inches is definitely ahead of avg on this date. The avg as of Feb 1 was below 15 inches for all 3 NYC airports. (not sure what it is for 2/13, but it can't be 5 inches more)
That's was the full run on pivotal, they're 18 hours for hrrr and like I said earlier to somebody else the final totals won't be as west oriented as these look since it would still be snowing past this.
I think the fact that it's still snowing when this run ends explains why east hasn't filled out as much as west. It seems like it will be a pretty wide swath of relatively similar totals area wide.