Nam is definitely holding energy back resulting in a slower storm and slower transfer. Heights definitely amplified rather well to the closed low formation in the Midwest.
Kuchera ratios based off a blend of models
DC south side 11:1
DC north side 12:1
Baltimore South side 12:1
Baltimore North side 13:1 going up as you go north
Near the Masondixion 15:1
I just checked kuchera ratios and they are around 14:1-15:1 For northern MD North of the 695-70 area so i agree it wont take much QPF to have a good snow up here. If the coastal continues its trend north then we can get even better.
Nam is still struggling at the surface as to where the slp should be. This run could have been much much bigger for all. I suspect the "better" models will do better with it. There really is nothing preventing this storm from coming north.