from the WaPo:
Midweek storm has snowy potentialBarely into the clean-up stage -- and before snow lovers can even come down off their "Snowmageddon" high -- we've got another possibly disruptive storm to track. A system expected to move through during the latter part of Tuesday and into Wednesday has the potential to once again put down some significant accumulation -- maybe several inches -- of snow or a snow/sleet mix.
The Global Forecast System model shows an area of intense upper-level energy approaching the area early Wednesday, which could mean significant precipitation, possibly in the form of snow. Courtesy NCEP.The storm that has eyes on the D.C. area is currently bringing precipitation to California and other western states. By late Tuesday, the storm's low-pressure center should be approaching from the west, and as it does it's likely to begin transferring its energy to a new area of low pressure expected to form off the North Carolina-South Carolina coast.
On the current pace and track, precipitation from this system would probably begin Tuesday afternoon or night and could be light at first. As is typically the case, the exact track will determine who gets snow or a mix (and how much), though the current thinking is that much of it could be snow, with the heaviest falling Tuesday night into Wednesday.
As with any storm more than 48 hours away, accumulation estimates are iffy at best, and should be treated as such. Here's a preliminary look at accumulation probabilities:
http://voices.washingtonpost.com/capitalweathergang/?hpid=topnews