I've seen this play out many times in my experience on the eve of big storms. The Nam has that one bonkers run that you cut the totals in half to get a true depiction and will correct itself by 12z while the rgem and GFS are too conservative and will usually correct itself upwards by 12z.
As usual, blend them all and I think a good forecast is 4-8+ well north and west, 8-12+ for NYC and immediate burbs, 12-18+ for Nassau, 18+ for Suffolk.