Good read from Mount Holly in their AFD, although the take away is they aren't overly impressed at this point.
As discussed yesterday, three perturbations will dictate the character of this storm as it affects the Mid-Atlantic. In general, the 00z model suite is in fair agreement with the overall evolution. The 00z GFS remains the fastest solution with all of these perturbations, though it has slowed toward consensus since this time yesterday. The largest difference remains its strong weakening trend with the southern-stream perturbation that rounds the longwave trough in the middle of the country Monday night. This is strongly tied to the quick nature of the northern-stream perturbation`s progression of the system toward the area. Meanwhile, the CMC looks much more like the general evolution of the GFS than it did yesterday, but noticeably slower. The ECMWF remains the strongest with the southern-stream perturbation and in developing a secondary low in the lee of the Appalachians Tuesday night before progressing it rapidly northeastward to the vicinity of coastal New England by 12z Wednesday. However, it has trended toward the weakening southern-stream perturbation that the GFS/CMC both suggest. With the general idea being operational model convergence with this system, a model blend was used for the forecast today with higher confidence than yesterday. On Tuesday, the surface low in the Great Lakes region will move into southeast Canada, with a cold front extending to the south. The front and proximity precipitation will likely approach the CWA by late in the day, but is unlikely to reach us before then. As such, lowered PoPs Monday night and Tuesday morning in an effort to narrow the timing. The primary window for precipitation looks to be Tuesday night as the front moves through the area. Notably, the timing and position of secondary low development along the front will be critical in determining strength and duration of precipitation. The stronger look of the ECMWF suggests slower timing and perhaps more prolonged precipitation along the axis of frontogenetical lift near and just west of the developing cyclone. Per trends, however, the strengthening phase most likely will occur in New England versus here, so precipitation should be fairly tame, especially since the strongest large-scale lift will be weakening (via a departing downstream jet streak) as the frontogenetical axis shifts across the region.