And here is the AM AFD from Mount Holly-
As the languishing midlevel vortex remains nearly stationary in south-central Canada, fast quasi-zonal flow will remain across the U.S. with periodic low-amplitude perturbations zipping eastward. Models have trended in two distinct ways the past 24 hours. First, the northern-stream vort max amplifying the late- week system for our area is noticeably weaker compared to simulations yesterday. Second, the progression of the midlevel Canada low allows for more troughing in eastern Canada. The result has been for a reduction in strength (suppression) of the system affecting the area Wednesday through Friday, and a steadily colder solution as well. Deterministic guidance exhibits, to varying degrees, an extended period of wintry weather late this week. The gist of the first portion of the event seems agreeable. Warm-advection precipitation will spread rapidly eastward to the northern Mid- Atlantic by Wednesday night, promoting a round of snow for the area as cold air advecting from the retreating surface high keeps surface temperatures below freezing for much of the area. The weaker nature of the upper-level shortwave trough suggests the strength and advance of the warm nose will be on the weak side, certainly weaker than that predicted by the models yesterday. A lengthy period of light snow is likely in this regime then for much of our area, with the main questions being how far south the potential for snow exists..
A second wave looks to move through the eastern U.S. Thursday night and Friday, which may bring a second round of wintry precipitation to the area. Questions abound regarding this potential, though, with the GFS quite suppressed (keeping most precipitation to our south) versus the more amplified ECMWF. The CMC seems more agreeable with the ECMWF, and the GFS fast-bias may be playing a role in its equatorward shift. However, in either scenario, any precipitation for the area would increasingly favor snow. Thus, felt confident moving precipitation types in that direction and lowering temperatures markedly in the Thursday through Friday time frame. The bottom line for the Wednesday through Friday period is that one or more periods of wintry weather seem likely, with meaningful impacts possible for much of the CWA.