Snippet from Mount Holly latest AFD- they are the better local forecast office, until they mention the 12k NAM.
In fact, snow probabilities of the NBM have actually gone up quite a
bit, now showing a 70-90% chance of 2+ inches of snow and a 60-80%
chance of 6+ inches of snow for areas south of Philadelphia, with
probabilities gradually falling off further north. Likewise, the
probabilistic Winter Storm Severity Index (WSSI-P) has increased
further with now almost our entire area expected to observe at least
Moderate Level winter storm impacts. As noted with the previous
shift, these probabilities are higher than the prior forecast cycle.