The first reports have said "12-20 inches" from the National Weather Service. However, a little birdie has told me that VDOT is preparing for totals reaching 36-50 inches. Either they are overpreparing, or this thing is gonna be huge by the time it reaches us.
I saw record snowfall several years ago when 41 inches fell in my front yard and swallowed my yardstick (I had to go out and stick another ruler on top of where my yardstick was). However, that was a "straight snowfall", where the weather was cold and snowy, but nothing else.
I'm now seeing warnings of blizzard-like conditions, with high winds and blowing/drifting snow on top of the accumulation we are expecting. We've seen some real notable snowfalls in the past 1 1/2 months (including 20+ inches in December), but this may be the KO punch that shuts things down for a few days.
UPDATE 5:24 PM
The prediction for the central and northern Shenandoah Valley is now up to 20-28 inches.