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Posted at 3:00 PM ET, 04/19/2009

Forecast: Clouds Creep in, Then the Rain

By Brian Jackson

* NatCast: Late Inning Showers? *

EXPRESS FORECAST

Today: Mostly cloudy, chance of late afternoon rain. 63-67 | Tonight: Rain likely. 47-50. | Tomorrow: Showers, afternoon t'storm? 55-58. | A Look Ahead

FORECAST IN DETAIL

I hope everyone enjoyed yesterday's rays as it looks to be the last significant sun we'll see for several days. While today should stay mostly dry, developing clouds forebear the storm to come. Once it starts raining late this afternoon or tonight, the chance of precipitation stays with us through Wednesday, with the greatest coverage and likelihood overnight into tomorrow. Fear not! Late next week shows promise for another fantastic weekend!

Radar: Latest regional radar loop shows movement of precipitation over past two hours. Powered by HAMweather. Refresh page to update. Click here to see radar bigger. Or see radar bigger on our Weather Wall.

Today (Sunday): Our run of pleasant weather looks like it will end today. We could see some sun in the morning hours but clouds will thicken during the afternoon. There's a 30% chance of rain during the late afternoon, and 40% chance during the early evening. Afternoon highs will be running in the mid-60s to low 70s. Winds will be indecisive at 5-10 mph, most of the time blowing in from the south and east. Confidence: High

Tonight: Periods of rain are likely overnight as a low pressure wave moves toward the metro area. Amounts could near a quarter-to-half an inch by morning. Overnight lows will range from the upper 40s to the lower 50s. Winds will be picking up out of the east-southeast at 5-16 mph. Confidence: Medium-High

Keep reading for the forecast through your mid-week...

20090418_0212.jpg
Beautiful sunshine in Leesburg, Va. yesterday. By CWG photographer Ian Livingston.

Tomorrow (Monday): Rain will be coming in two batches tomorrow -- potentially impacting both commutes. Steadier morning rain should taper off to drizzle if not stop altogether mid-day. Then later in the afternoon -- for your drive home -- showers should begin to increase again, along with the outside chance of some thunder. Additional rainfall will generally average in the neighborhood of 0.1" with the possibility of another 0.25" in any bands of heavier showers/t'storms. Day time highs will continue a downward trend, topping out in the mid-50s to near 60. Winds will blow from the east at 5-10 mph. Confidence: Medium

Tomorrow Night: Rain showers are reluctant to leave us behind, though will slowly decrease in both coverage and intensity. Overnight temperatures will drop just modestly into the low-to-mid 50s. Winds will be variable at 5-10 mph. Confidence: Medium

A LOOK AHEAD

Tuesday will likely see at least a brief dry period as showers taper off in the morning. We may even see a few peeks of sun between mostly cloudy skies before another disturbance offers a 25% chance of setting off a few more light showers in the late afternoon/evening hours. Expect highs in the low 60s. Confidence: Medium

A pesky upper low over the Great Lakes looks like it will give Wednesday a 50/50 split between clouds and sun. We may even see a few more showers, though the chance is low (<20%). Highs will remain below normal, only topping out near 60 degrees. Confidence: Medium

By Brian Jackson  | April 19, 2009; 3:00 PM ET
Categories:  Forecasts  
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Comments

Still dry and cloudy here, though radar has persistent echoes in the area. Tomorrow's rain potential still exceeds one inch, but may taper off late for Chevy Chase swing dance.

Posted by: Bombo47jea | April 19, 2009 2:19 PM | Report abuse

Backdoor front continues to push west of D.C. now. Easterly winds bringing some cooler air in.

Posted by: Ian-CapitalWeatherGang | April 19, 2009 2:30 PM | Report abuse

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