Overview from Mount Holly in their AM AFD:
While there is still some uncertainty regarding the actual surface low track, the guidance has shifted more southeastward. This appears to be due to today`s storm getting a bit stronger east of New England, plus the 00z ECMWF in the northern stream presses the lead short wave farther east. This lessens the mid level divergence in the height fields and pushes more zonal thus keeping the southern short wave farther south (more toward the GFS solution). Other guidance is also a bit more south and east. This would tend to favor some colder thermal profiles, however a more southern track may also lessen the dynamic forcing to some extent especially the farther northwest one goes. Our region however is still forecast to get within the favorable right entrance region of a 250 mb jet. This will also help to strengthen the surface low as it tracks to our east. In addition, the incoming amplifying trough will produce a period of widespread large scale ascent, which will be augmented by a zone of stronger 850-700 mb frontogenetic forcing especially during the first half of Sunday night.