Update:  The National Weather Service is warning that a "significant" snowstorm could affect the region this weekend. Here is the statement issued at 2:43 p.m. today:

...POTENTIAL WINTER STORM THIS WEEKEND...

LATEST COMPUTER GUIDANCE SUGGESTS THAT A WINTER STORM COULD
IMPACT THE MID ATLANTIC REGION SATURDAY THROUGH SUNDAY. BASED ON
THE LATEST INFORMATION ACCUMULATING SNOWFALL IS POSSIBLE ACROSS
THE REGION THIS WEEKEND. AT THIS TIME...THERE IS TOO MUCH
UNCERTAINTY ABOUT THE EXACT TRACK OF THIS STORM TO DETERMINE SNOWFALL
ACCUMULATIONS. AS THE EVENT DRAWS CLOSER...MORE DETAILS WILL
BECOME CLEAR AND SNOWFALL ACCUMULATIONS WILL BE DETERMINED. THOSE
WITH ACTIVITIES THIS WEEKEND SHOULD KEEP ABREAST OF THE LATEST
FORECASTS.

Earlier post: The forecasters out at Sterling haven't posted anything yet, but they tell the WeatherBlog to watch for an updated "hazardous weather outlook" after 4 p.m.  Dave Manning, the warning coordination meteorologist, says forecast models are showing stronger possibilities for a "significant winter storm" for our area over the weekend. He declined to hazard a guess on amounts. In fact, the whole scenario remains a bit iffy, and he said "we gotta get a few days closer" before anyone will hazard a prediction on accumulations. But with no measurable snow since Dec. 15 at BWI, any accumulation at all would be news.

AccuWeather, always a bit edgier, has begun to suggest the same thing, at least as a growing, perhaps even "scary"  possibility.

So watch this space. Or watch the forecast page from NWS Sterling.