D.C. area forecast: Winter is back, and here to stay for a while; snow chance early Wednesday

Today’s Daily Digit

A somewhat subjective rating of the day’s weather, on a scale of 1 to 10.

4
The wind, the chill. So over it. Jason, CWG.

Express Forecast

Today: Partly to mostly sunny, blustery. Highs: 42-48.

Tonight: Partly cloudy, cold. Lows: 25-30.

Tomorrow: Mostly cloudy, chance of snow flurries/showers. Highs: 37-43.

FORECAST IN DETAIL

Temperature Map

Temperatures: Latest D.C. area temperature map. See interactive map on our Weather Wall.

So long 60s. Today’s highs in the mid-40s may be the “warmest” in the week ahead as a whole new weather pattern takes command. Wave after wave of cold guarantees below normal temperatures – frequently struggling to surpass 40.  With the cold air in place, we’ll have a few opportunities to see snowflakes: Tuesday, Wednesday and Saturday.  While snow may fly a few a times, none of the responsible storms/disturbances – at least right now – look like big ones.

Today (Monday): The sun emerges brilliantly behind the overnight cold front, but it will be deceptively chilly.  Highs reach the mid-40s – some 15 degrees colder than the weekend. Winds at 15-20 mph, gusting a bit higher at times, make it feel like the 30s. Confidence: Medium-High

Tonight: Winds die down but with arctic high pressure parked over us, it’s a very cold night.  Lows range from  near 20 in the colder suburbs to the mid-to-upper 20s downtown. Skies are mostly clear for the balance of the night, but some high clouds may sneak in towards morning. Winds are light. Confidence: Medium-High

For related traffic news, check out Dr. Gridlock. Keep reading for the forecast through the weekend…

Tomorrow (Tuesday): Partly to mostly cloudy and chilly. During the afternoon, we could see a snow shower or flurry, especially west and northwest of the District.  Any accumulations a dusting or less.  Highs range from the upper 30s in those colder suburbs to the low 40s elsewhere. Confidence: Medium

Tomorrow night: Increasing clouds with a 50 percent chance of light snow, in the hours prior to dawn.  Lows range from 23-28 (suburbs-city). Confidence: Medium-High

A LOOK AHEAD

Snow Potential Index

A daily assessment of the potential for at least ~1″ of snow in the next week, on a 0-10 scale.

4 (↑) Wednesday morning’s snow chance starting to get better computer model support.

Snow is likely in the morning Wednesday, with some light accumulations possible (stay tuned for more details on this event in a forthcoming post midday to early afternoon).  Any snow ends by around noon, if not before.  In the afternoon, it becomes partly sunny but breezy and cold.  Highs probably range from around 31-36. Becoming mostly clear and very cold at night, with lows near 20 in the District, to the teens elsewhere.  Confidence: Medium

Thursday and Friday are both quite cold as arctic air spills into the region.  Highs Thursday  are only in the low-to-mid 30s, with 35-40 on Friday.  Thursday night’s lows are probably in the teens to low 20s (downtown). Confidence: Medium

On Friday night and Saturday, we need to watch a storm system developing to our south that could bring another period of snow or even mixed precipitation, depending on its track and strength. Right now, it doesn’t have the look of a major storm, but it’s premature to speculate about specifics. Lows early Saturday morning are around 25-30, with highs in the 30s to near 40. Confidence: Medium

Saturday night and Sunday:  We should catch a brief break from the storminess, but it’s still quite wintry.  It’s windy and cold Saturday night with lows in the teens to mid-20s (downtown).  For the most part Sunday looks dry, but another weather system may approach by Sunday evening.  Confidence: Medium

Jason is currently the Washington Post’s weather editor. A native Washingtonian, Jason has been a weather enthusiast since age 10.
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