The 12z CMC is much further south from 0z. The windshield wiper effect continues. Also the cmc comes in with ICE like the GFS for the Wednesday system, albeit light.
Strong HP anchored to the NNE for the Wednesday/Thursday system. That's the one that definitely could be a legit ICE storm for CAD regions if that HP holds in future runs.
12z GFS went back south again with ICE in the normal spots... northern VA is fringed per GFS and central VA gets rocked. 2nd system for Wednesday with a stronger CAD brings more ICE.