PM Update: Storms likely this evening; drying out Wednesday, still hot

* Severe Thunderstorm Watch through 10 p.m. except southern suburbs *


Radar & lightning: Latest D.C. area radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

7:45 p.m. update: Areas northwest of the Beltway have seen the end of the storms for the most part, but storms are still rumbling through D.C.’s northeast, east, south, west, and southwest suburbs. The most intense activity is just east of Columbia headed towards Baltimore. All of this activity is heading east and should take the next couple hours to exit entirely.

The general trend for these storms should be to weaken but downpours, gusty winds and lightning are possible as this activity pushes towards Southern Maryland and the Bay.  After 10 p.m., there is a slight (20 percent) chance of an overnight shower or rumble as the cold front comes through.

Unless more severe storms develop, this is the last update. Follow our Twitter feed below for any additional updates and watch the embedded radar to track the storms. Be sure to check the blog tomorrow mid-morning. We have an incredible compilation of cloud images to share!

6:20 p.m. update: Storms west of the District are flaring up – especially in southern Loudoun and western Fairfax County, north of I-66 and heading ENE.

A severe thunderstorm warning has been issued for northern Loudoun County for a storm heading into Purcellville and towards Leesburg through 7 p.m. A sliver of southeast Frederick and southwest Montgomery County is also included in the warning. This area of storms – which may produce small hail and isolated damaging wind gusts – is moving east-northeast. Like earlier storms – it should focus north and west of the Beltway.

Original post from 6:10 p.m.

Heat-fueled storms have rumbled through D.C.’s northwest and northern suburbs late this afternoon into early evening, and there’s a chance the immediate metro area sees a storm or two before we dry out overnight. Wednesday is not as humid, but still on the hot side.

Through Tonight: There’s a 30-50 percent chance of storms through around 10 p.m. this evening over much of the area, with the lowest chances in our southern suburbs. An isolated storm or two could be strong to severe, with damaging winds and/or small hail. Otherwise, it’s partly cloudy and mild, with lows in the mid-60s in our cooler suburbs to the low 70s downtown. Mostly light winds, except in thunderstorms.

Tomorrow (Wednesday): Mostly sunny and hot, but not as humid (dew points dropping into the low 60s). Highs range from the mid-80s in our cooler suburbs to the northwest to around 90 in the District and to the south. Winds are from the west and northwest around 5-10 mph.

See Matt Rogers’ forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter . For related traffic news, check out Dr. Gridlock.

Pollen: Tree counts are LOW-MODERATE; grass counts LOW-MODERATE; weed counts are MODERATE-HIGH, and mold spores are MODERATE-HIGH.

Today’s heat:  The high at Reagan National hit 95 today.  The highs the last three days have been 96 (Sunday), 95 (Monday) and 95 (today) making this 3-day stretch the hottest of the year.

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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