10:30 p.m. update: Model data and radar continue to support the idea of some snow showers moving into the region after about 2 a.m., with 3 a.m. to 9 am. being the most likely window. A dusting to a half inch is the most likely accumulation potential, although a narrow band of 1 inch or a little more could set up somewhere in the region (as a period of heavier snow may fall in this band). We think there’s about a 60 percent chance you awaken to a white ground.

Slick roads and some delays are possible (especially focused where any heavier band sets up) but we do not expect widespread issues on treated roads.


After yesterday’s record challenging 70+ warmth, today’s temperatures rapidly reversed course, with this afternoon readings some 30 degrees cooler. Not to mention, blustery winds have gusted frequently over 30 mph. Up next: a period of light snow and flurries arrives leading up to and just in time for Friday morning’s commute.

Through Tonight: Clouds slowly increase this evening with a few flurries around, mainly west of the District. Pre-dawn (between 2 and 5 a.m.), a more widespread area of snow showers and flurries likely (60 percent chance) arrives, as low temperatures dip into the mid-20s in the colder suburbs to 29-32 downtown. It’s not quite as windy overnight, with a breeze from the southwest at 10-15 mph. The chance of measurable snow by sunrise is about 50 percent.

NAM model simulates a band of snow over the D.C. area around 4-5 a.m. (WeatherBell.com)

Friday: Snow showers and flurries are likely through mid- morning, with general accumulations from a dusting to half an inch - although somebody could see a quick inch. These snow showers could briefly reduce visibility and cause a few slick spots, so allow extra time for the morning commute. As the snow decreases, winds pick up (gusting over 30 mph from the northwest) and the afternoon is blustery and very cold. Temperatures are steady in the low 30s, with wind chills in the teens and 20s.

Link: National Weather Service snow map

See David Streit’s forecast through early next week. And if you haven’t already, join us on Facebook and follow us on Twitter. For related traffic news, check out Dr. Gridlock.

The Rapping Weatherman: Check out the battle - Mother Nature versus Old Man Winter