FWIW, 18Z GEFS is more enthused than OP for snow. It has a 60% chance that DCA, IAD, and BWI exceed 1" snow. That's usually a good sign for an advisory level event in these parts. I'd post the graphics but they're through a paywall site.
Really happy for you southern folks. We always cash in while you mix or flip. Even better is that you stole a storm from within 60 hours! Big winner today might be the GFS though. IMO, big win for American NWP.
NAM is north. 18z had the surface low in SC, 00z has it in NC. If you're south of I-70, you look good for a solid event. Really amazing how this event has appeared out of thin air.