The 12z Euro had a really nice pass at 500 with the main feature sliding by to the south of DC. That's exactly what you want to see for a solid, cold smoke snowstorm. Given the cold 850 temps and antecedent air mass, 10:1 or even 12:1 snow ratios would be possible. As @stormtrackersaid, this is what we want other models to trend towards. Would easily be the biggest snowfall in the past couple of winter and would put all 3 terminals at or above yearly snowfall.