Just updated AFD from Mount Holly-
The latest guidance has trended a little slower with the low, which could potentially lead to more snow as more precipitation could fall coincidentally with the cold air. The models are in good agreement with the location of the high moving across southeast Canada Tuesday night into Wednesday, which will set up the cold air across the region. By Tuesday night and Wednesday, an area of low pressure is forecast to move up the southeast coast into the Mid Atlantic region, then continue to our east and out to sea Wednesday night into Thursday. The current track from the model guidance keeps the low near the coast as it passes by. This will bring precipitation to the entire forecast area, possibly starting as early as Wednesday morning, and continuing through the day into Wednesday night. With the current track, the forecast is for snow to start virtually everywhere Wednesday morning, before a mix and/or change to rain begins to lift northward into portions of southern/central Delaware and Maryland, as well as southern/eastern New Jersey; just south and east of the I-95 corridor. Along and north of the I-95 corridor, the forecast is for snow during the duration of the event. Eventually by Wednesday evening and overnight, cold air will move back in for all places, and everyone could change back over to snow where it changed to a mix or rain during the day. The precipitation types will be dependent on the track of the low and thermal profiles, so this could all change in the coming days. Although we do not have specific snowfall amounts forecast yet, all guidance is pointing to a significant snowfall accumulation for eastern Pennsylvania, much of New Jersey, northern Delaware and northern Maryland.