Very interesting that the NWS bumped snowfall back up for areas N of 276/195, including CNJ/NNJ/NEPA/NYC, with their 4 am forecast, as per the map below; it's fairly similar to the Channel 7 forecast in the post above. Their 1" line moved from just south of 78 to about 80, except for NENJ (Union/Essex/Hudson) and NYC/LI, where <1" is forecast, and their 2" line is now from about Frenchtown to Sea Bright and the 3" line is along 276/195 (was 10-15 miles south of there); south of that 3" line very little change. The NWS discussion doesn't have the usual "model discussion" section at 4 am. In contrast, TWC has the 1" line along 276/195 with <1" north of there and the 3" line from about Wilmington to AC, as do others, while News12NJ is between the two camps with their 1" line from about Frenchtown to Sea Bright and their 3" line from Philly to LBI with 3-6" south of there.
Bust potential is pretty high, IMO, as the global models at 0Z last night and 6Z this morning continue to show much less snow than this across the board, with generally <1" N of 276/195 and even only an inch or two for the Phillly/SNJ area; they must be leaning more towards the meso/CAM models, like the NAM3K, HRRR, RAP, SRERs, etc., which show amounts similar to the NWS map (or even more). From a meteorological perspective, this is a fascinating conundrum to have these two camps so far apart, but from a "client" perspective it's very frustrating to have such low confidence in the NWS forecast.
Also, warnings are up for 4-6" for SEPA/SNJ and south of there (where up to 6-8" are forecast south of Wilmington to AC), while advisories are up for 2-4" for Lower Bucks/Montco/Philly proper and for NW Burlington/Ocean.