Decent discussion from Mount Holly-
Tuesday night the surface cold front will be well off the coast with not much in the way of coverage initially expected. Late Tuesday night into very early Wednesday the 700/600 MB thermal gradient will begin to tighten as the shortwave approaches. Latest GFS and NAM FGEN fields are fairly impressive with lift increasing starting over Maryland and spreading northeast. The NAM and the other high res models are depicting this as precipitation spreading over the area rather rapidly Wednesday morning. The NAM is slightly further south with the strongest forcing for ascent compared to the GFS and ECMWF, but overall agreement is not too bad. The main concern will be precipitation type issues. Over the southern Poconos thermal profiles support all snow for the event, but the strongest FGEN signal remains just southeast of this area. The best forcing for ascent is usually towards the warm side of the FGEN band, which would favor limiting snowfall totals here. Towards the I-95 corridor the best chance of precipitation exists, but thermal profiles initially support rain. Both the NAM and GFS show initially rain changing over to a rain/snow mix and then finally all snow. NAM forecast soundings indicate slightly stronger 700/800 mb winds and implied WAA. A brief transition to sleet is indicated via the NAM, but the most likely scenario appears to be rain/snow to snow as max temperatures aloft on the NAM seem to warm compared to the GFS and ECMWF. The most likely snowfall totals across the area are about 1 to 2" with slightly higher totals over the northwestern zones. The change over to snow and subsequent totals will be highly sensitive to the thermal profile and QPF footprint though.