Latest take from Mount Holly-
Thursday into Friday the upper level low that was over the central United States is forecast to merge with another upper level disturbance diving south out of central Canada. The GFS has these two waves constructively interfering with one another with rapid deepening forecast. The ECMWF shows something similar, but is slightly slower. The CMC is by far the slowest here. Either way, the upper level dynamics with this system look very impressive with a 150 kt jet streak and accompanying 150/300 m height falls. Latest forecast soundings show a very impressive veered wind profile. The LLJ is also very impressive, with the 925/850 mb layer average forecast to be around 70 kts. Out ahead of the approaching cold front showers and some embedded thunder will be possible, with a change over to snow on the backside of the cold front also possible.