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Posted at 05:00 AM ET, 03/13/2013

D.C. area forecast: Increasing clouds, some afternoon showers today; changeable thereafter

EXPRESS FORECAST

Today: Trending cloudier, breezy. Afternoon shower possible. 48-54. | Tonight: Partly cloudy. Mid-20s to near 30. | Tomorrow: Mostly sunny, windy. Low-to-mid 40s. | A Look Ahead | 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


Pretty avg day for mid-March. Winds and chance of an afternoon shower are a -1 from the baseline of 7 (on a school grade scale). 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: 1 (→) - System Sun/Mon running into a chilled air mass but still a way to go locally if you like snow. Get the SPI on Twitter | Discuss on Facebook

FORECAST IN DETAIL


The march toward spring continues, but we won’t be spending much time basking in any warmth over the coming days. Overall, a fairly typical back and forth swing in temperatures is up ahead, but generally we’ll be spending more time below average (now in the mid-50s for highs and near or above freezing for lows) than above average. By late in the weekend a wintry type storm may threaten, but it’s got a big temperature battle to overcome.

Today (Wednesday): We start off with partly to mostly sunny skies, but trend cloudier as the day progresses. Cold air aloft and a disturbance riding along the jet stream help promote mostly cloudy skies for the second half of the day, and we might even see some showers (30-40% chance) during the afternoon. Highs should reach near 50, and perhaps into the 50s if we get enough sun. Winds from the northwest increase to about 15 to 20 mph in the afternoon with some gusts past 30 mph. Confidence: Medium-High

Tonight: Showers will dwindle with sunset if not prior, so we’re looking at a dry night. It’s pretty cold though, with lows reaching the mid-20s to near 30 under clearing skies. Winds diminish a bit from during the day but they’ll stay up around 10 mph with higher gusts. Confidence: Medium-High

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

Tomorrow (Thursday): It’s mostly sunny and will look nice, but looks can be deceiving. Winds might actually be up from today after an overnight lull, with sustained speeds around 20 mph or higher with gusts to 35 mph or so — diminishing late. Our first cold spell hits its daytime peak with highs only making the low-and-mid 40s most spots. Chilly, even in that strong March sun. Confidence: Medium-High

Tomorrow night: Daytime winds should finally really ease into the overnight, becoming pretty light after midnight. With plenty of clear skies early, temperatures again fall to below normal levels in the mid-20s to near freezing for lows. Clouds should increase after midnight though, so perhaps a touch warmer than tonight. Confidence: Medium-High

A LOOK AHEAD

On Friday the beginnings of a clipper system passing to our north may shroud the skies at least at times, seemingly favoring northern areas with the most clouds. A mild flow out ahead of the weak system should help bump our temperatures back toward average, mainly near 50 to the mid-50s. Confidence: Medium-High

The weekend is a little murky, mostly with cloudiness, but also with swings in weather. The first weak system passes by but may first yield highs in the mid-50s to near 60 on Saturday, along with some showers. But, much colder air filters in behind it, setting the stage for temperatures only in the 40s on Sunday as another system approaches. For now, it seems the best odds of snow, should there be precip in the area, would be north of us heading into Sunday night, but we’ll keep an eye on it. Confidence: Medium

By  |  05:00 AM ET, 03/13/2013

Categories:  Forecasts

 
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