EDIT: Canadian and EURO models have come in and they're in agreement that we're going to get a solid snowfall. Should be rain Wednesday afternoon turning into snow by 7pm and hitting pretty hard overnight.
The latest GFS forecast projections put the Manassas area in the upper end 3"-6" range. DC, Arlington etc. in the 6"-10" range. Boston still coming in around 2'. Got a good feeling as this is the first time this winter the NAM and GFS have come together like this on snow and the GFS is usually the conservative one on projections.