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Posted at 05:00 AM ET, 12/24/2012

D.C. area forecast: Afternoon/evening wet snow or mix; calm Christmas, then stormy

EXPRESS FORECAST

Today: Cloudy, wet snow or mix likely in PM. 37-41. | Tonight: Snow or mix early, then mostly cloudy. 31-35. | Tomorrow: Partly sunny, seasonable. 44-48. | Get Express Forecast by E-mail

TODAY'S DAILY DIGIT

A somewhat subjective rating of the day’s weather, on a scale of 0 to 10


Possible snowflakes leading up to Christmas something to smile about. Get the Digit on Twitter| Discuss on Facebook

SNOW POTENTIAL INDEX

A daily assessment of the potential for *accumulating* snow for the next week on a 0-10 scale. More info


SPI: 5 (↑) - Christmas Eve wet snow could whiten ground; odds of snow rest of week down, not quite out. Get the SPI on Twitter | Discuss on Facebook

FORECAST IN DETAIL


Christmas week brings with it the most active winter weather of the season thus far with three opportunities for precipitation of various types. We begin with the chance of snow or a rain/snow mix for the second half of today. A stronger storm brings mostly rain Wednesday (Boxing Day), but precipitation could start off as some sort of frozen mix west of town. Then, on Saturday, a third system may bring rain, snow or a mix. In between these stormy days, we have dry, seasonable weather with highs in the 40s.

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

Today (Monday): The first half of the day is cloudy and calm as temperatures slowly rise through the 30s. During the afternoon, snow and rain develop from southwest to northeast, which have a good chance of transitioning to mostly snow except south and east of the beltway where a rain/snow mix is more likely. Highs near 40 fall back into the 30s as precipitation gets going. Any snow accumulation is primarily on grassy areas. Confidence: Medium

Tonight: Snow or a rain/snow mix probably tapers to drizzle before ending between 7 p.m. and midnight. Total snow accumulations, mainly on grassy areas, are: a coating to 1” north and west of the beltway (except 1-2” at high elevations of Loudoun and Frederick county), no accumulation to 0.5” inside the beltway, and little or no accumulation south and east of the beltway.

After midnight, it’s mostly cloudy with patchy fog, and lows 30-35. Confidence: Medium

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

Christmas (Tuesday): Skies become partly to mostly sunny and it’s pretty nice out all things considered. Highs reach the mid-to-upper 40s with a light wind from the north at 5-10 mph. Confidence: Medium-High

Tomorrow night: Increasing clouds with a slight chance of rain by morning, except possibly freezing rain, sleet and/or snow north and west of the beltway. Lows range from 30-36 (suburbs-city). Confidence: Medium

A LOOK AHEAD

Rain is likely Wednesday (Boxing Day), except there’s a slight chance of a frozen mix early in the far north and west suburbs. The rain may be heavy at times, with a chance of thunder. Highs range from the mid-40s in the colder suburbs to 50-55 south and east of the District. Rain ends Wednesday night, and it turns breezy, with lows 35-40. Confidence: Medium

Thursday and Friday are quiet days. Skies are partly to mostly sunny, with highs 40-45 and overnight lows from the low 20s in the cooler suburbs to near 30 downtown. Winds are a bit gusty Thursday before subsiding Thursday night and Friday. Confidence: Medium-High

The last of the week’s three storm systems may work through the region Saturday and perhaps linger into early Sunday. (skies may start to clear later that day). It’s too soon to provide a detailed sense of what to expect except to say there are above average odds of precipitation Saturday into the first half of Sunday, which could be rain and/or snow. Highs both days probably won’t be any warmer than 40-45, and could get stuck in the 30s if there’s precipitation. Overnight lows are likely around 30-35. Confidence: Low

By  |  05:00 AM ET, 12/24/2012

Categories:  Forecasts

 
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