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Posted at 3:30 PM ET, 09/ 9/2008

PM Update: Showers Begin to Usher in Cooler Air

By Ian Livingston

Wednesday brings a taste of autumn

Radar: Latest mid-Atlantic radar loop shows movement of precipitation over past two hours. Click here or on image to enlarge. Refresh page to update or restart animation. Powered by HAMweather.

Clouds efficiently blocked the sun today, allowing for very little surface heating. The ultimate effect of this was fewer thunderstorms and more light rain than had been anticipated. Before being rain cooled, most locations rose to highs in the upper 70s to near 80 degrees and have since fallen back to the low and mid 70s. Some sunshine this afternoon may allow temperatures to rise a little from current numbers.

Tonight: After a risk of evening showers and isolated storms, a cold front will sweep through the area tonight and bring with it significantly cooler and drier air by tomorrow. Expect lows to reach near 60 in the suburbs and mid 60s in the city. A northwest wind gusting over 15 mph at times may add a bit of a chill to the air late-night.

Tomorrow: Wednesday will be cool and variably cloudy. It appears tonight's cold front may get hung up close enough to the area to see a fair amount of clouds during the day, so those north and west of D.C. may see more sunshine while those south and east see less. High temperatures look to run about 10 degrees below normal as many places top out right around 70 degrees. Maybe low 70s with enough sunshine.

See Matt's full forecast through the weekend, and also check out our latest thoughts on Hurricane Ike as it leaves Cuba and heads toward the U.S.

By Ian Livingston  | September 9, 2008; 3:30 PM ET
Categories:  Forecasts  
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What time is the front going to come through tonight? It's too sticky out right now to open the windows, but I want to be ready for the that cool, dry air!

Posted by: Barnaby | September 9, 2008 6:04 PM | Report abuse

To be honest, I have trouble remembering we're approaching mid-September. If it weren't for the discolored leaves on my lawn, I would have presumed we were still in August.

Posted by: mcleaNed | September 9, 2008 6:48 PM | Report abuse

Barnaby, the cold front is fairly accurately marked by the few showers/thundershowers to our west and northwest in the radar attached to the post. It should be through most if not all of the area by midnight.

Posted by: Ian, Capital Weather Gang | September 9, 2008 6:56 PM | Report abuse

The thunderstorm threat for tonight's dance has diminished. A rain threat remains for the weekend.

Posted by: El Bombo | September 9, 2008 7:15 PM | Report abuse

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