4:55 p.m. update: As some of us squint our eyes to see flakes here in the D.C. area - though a band of light to moderate snow is now trying to move toward the District from the northeast - they're getting hit hard up in Philly, NYC and Boston. Take a look at the intense radar returns headed due north toward Boston and points south as we speak. NWS predicts 12-20 inches for Boston, which along with NYC remains under a Blizzard Warning. Around here, snow lovers continue to pin their hopes on a dusting to an inch through evening.
4:20 p.m. update: In an interesting twist, there's now more snow north and west of I-95 than there is to the east, at least until you get to the western shore of the Bay. That trend will probably eventually reverse course as the storm continues to pivot and ultimately pull away to the northeast. So as we head toward evening we should start to see the east-to-west moving bands of snow shift to west-to-east. All of the snow continues to be light, so it'll be hard for anyone in the metro area, except for right along the Bay, to see more than 1" before the snow moves out later this evening.
3:45 p.m. update: Precipitation on radar is blossoming some, so up to 1" or so is a possibility in a few spots, even west of D.C. This snow, accompanied by gusty winds and subfreezing temperatures, should continue, on-and-off, for the next several hours.
Almost lost in the shuffle of everything happening (or not happening) is the fact a wind advisory was issued for the far western suburbs, including Loudoun, Frederick and northern Fauquier counties for gusts over 45 mph between 9 p.m. tonight and 9 p.m. Monday.
3:10 p.m. update: This storm is now pushing snow well west of I-95 all the way into Loudoun county. Snow is pivoting back to the southwest as the "comma head" develops. This is a process often seen in maturing coastal storms. A lot of the snow is light, but the storm no longer looks to be a shutout for the far western suburbs.
Well to the east, I'm hearing reports of 7" already in Salisbury. A blizzard warning is now in effect for the Delaware beaches (Bethany and Rehoboth) where 12-18 inches of snow may fall when all is said and done, accompanied by wind gusts to 40 mph.
2:30 p.m. update: As the coastal low intensifies and gets closer to our latitude, we're starting to see bands of snow pivot back from east to west. If a light accumulation is going to occur in the metro area, it's most likely to occur over the next several hours as these bands do their best to push westward (although they're fighting dry air). We expect the western cutoff for the snow to be around I-95 although some snow could certainly sneak a bit further west than that at times (and appears to be doing so in a few spots). As the snow and wind pick up and temperatures remain steady or slowly fall toward through the upper 20s, slick spots are possible on the roads.