7:35 p.m. update: Today’s rain and mostly non-accumulating snow is all finished save for lingering pockets of drizzle. Who did see some snow accumulation? Here are a few paltry totals from NWS: Germantown (0.1”); Gaithersburg (Trace); Herndon (0.1”); Dulles (Trace). Even those, though, were mainly on grass. Here’s more totals and a map. Temps are at or slightly below freezing in the far north/west burbs (e.g., Frederick, Loudoun, n. Montgomery, n. Prince William, n. Fauquier counties), so slick spots possible there especially in the a.m.
6:15 p.m. update: Precipitation is decreasing in coverage and intensity. This one is about over. Don’t think even a trace of snow made it to the District. An underachiever...no doubt. Watch out for possible slick spots though far western and northern areas with temps there around freezing. See our Social Media collection blog post to see reports and photos throughout the event.
5 p.m. update: The back edge of this event is getting close and the rain/snow line is trying to push eastward towards the west side of the beltway but facing resistance. We’re getting some reports of snow mixing with rain in Bethesda, Falls Church, McLean but that may be about as far east as flakes get from this underwhelming event. Precipitation should wind down in the next hour or two. One moderate band of precipitation stretching from central Montgomery county through central Fairfax and Prince William county may briefly bring flakes to regions yet to see them as it moves east. Then precipitation tapers off.
Overview: Snow, rain and a rain/snow mix continue across the area, and should do so for the next few hours before tapering off from southwest to northeast (between 6 and 7 p.m. or so). As with most of our snow events this year, elevation and being north and west of the city have been and will continue to be critical for getting accumulation.
Accumulations so far: Once above about 500-1,000 feet in elevation in our north and west suburbs, snow has stuck with around 0.5-1.5” thus far But those amounts quickly fall off at lower elevations to a coating or so and nothing further south and east.
Forecast through Tonight: Snow, north and west of town, and rain, possibly mixing with and changing to snow elsewhere, come to an end early this evening. Temperatures are dipping through the mid-30s in the west and north suburbs, and they may fall close to freezing come sunset.
Any place that transitions to all snow may at least see some accumulation on grassy areas, but roads should stay wet except perhaps above 500-1,000 feet in elevation (in Loudoun, NW Montgomery, and Frederick counties). And while most roads are treated, it’s worth keeping an eye out for slick spots even after precipitation stops as temperatures cool.
We probably stick with clouds for a good part of the night before more earnest clearing late. Lows should fall to near freezing downtown and into the mid-or-upper 20s in the suburbs.
Tomorrow (Thursday): Be wary of a few potential slick spots in the morning, but most places should be relatively trouble free. Plentiful sunshine returns, as does milder air back up around the average for this time of year. A light wind from the northwest should be no real issue as highs rise to the mid-and-upper 40s.