Thanksgiving COLD storm is more like it. I know I said the GFS's numbers are crap this far out, but looking at the 12Z's prognostication of 850 T, I would say Thanksgiving day will be one to remember, temperature wise. For several runs now it has basically broken off a mini-"polar vortex" across the Midwest and Ohio Valley for Turkey Day. Temps at 850 of -15 would surely mean lake effect snow to boot, and surface temps struggling through the 30's all the way to TN.
The snowstorm is still on to the west of the surface low track, and with several models taking this into the 980's (or even to 980 mb), blizzard conditions seem possible at times, particularly further north in the event. Thursday will also be very brisk, with wind advisories likely across much of the east. Hope no one planned a Thanksgiving Day picnic!