BOX forecast is discounting the NAM for now btw given that its so slow and west.
"Explosive cyclogenesis occurs off the Mid Atlc coast tonight, with an impressive ~40 mb pressure drop in 24 hrs, yielding a bomb cyclone of around a 965 mb low over the eastern MA waters Sat evening! 00z guidance trended west and is in somewhat better agreement than previous runs, however differences still exist. The 00z NAM (especially the 12km NAM) the deepest, slowest and farthest west solution of the 00z guidance. Therefore followed a non NAM model blend solution for this portion of the forecast."