Severe thunderstorm watch thru midnight

PostLocal: Man killed during storm; thousands lose power

Pics of trees down & damage: D.C. @ 3rd & I, NE; Arlington @ Old Dominion Dr; Dupont Circle; D.C. @ 10th St. NW; D.C. @ P St. NW; Storm clouds over the Potomac(from near Old Town Alexandria); Video of storm in Dupont Circle

10 p.m.: Severe T’storm Watch is cancelled except for down to the south in Stafford, Charles, St. Mary’s and Calvert counties, where it remains in effect until midnight.

7:40 p.m.: The strong to severe storms that plowed through the gut of the metro area are now well east out over the Chesapeake Bay after taking down numerous trees (pic from Arlington), knocking out power to thousands, and producing at least one wind gust upward of 70 mph. Out west, a second area of storms continues to move southeast through Prince William, southern Fairfax and the southern half of Fauquier counties over the next 1-2 hours. Weaker showers and a few isolated storms may bother areas mainly south of I-66 and D.C., and east of I-95, through evening, but the main event is probably over. (7:50 p.m.: South/central Fauquier, southern Prince William and western Charles counties now under severe t’storm warning until 8:45 p.m.)

6:55 p.m.: Storms should exit the District over the next 20 minutes or so as they move southeast through central/southern P.G. and Anne Arundel counties, which are under a severe thunderstorm warning until 7:15 p.m. These storms continue to feature heavy rain and frequent lightning, with the potential for damaging winds near to past 60 mph. To the west, another area of storms has northern Fauquier and southern Loudoun counties under a severe thunderstorm warning until 7:45 p.m. for the potential for both damaging winds and quarter-size hail. Northern Prince William and western Fairfax counties may see some of this action over the next hour, and it could eventually drift east toward the Beltway.

6:05 p.m.: More or less the entire immediate metro (including everywhere inside the beltway and the District) region is under a severe thunderstorm warning through 7 p.m. If you’re outside, move in - dangerous lightning likely with these storms... and also the possibility of damaging winds to 60 mph... not to mention heavy rain. (6:30 p.m.: To the west, western Loudoun and northern Fauquier counties are also under a severe thunderstorm warning, until 7:15 p.m., also for the potential of damaging winds near or past 60 mph.)

Overview: A severe thunderstorm watch has been issued until midnight for the entire metro region. A cold front moving through the area is likely to trigger scattered thunderstorms. The main threat with these storms will be dangerous lightning and torrential rain. However, a few storms may produce damaging winds and hail.

Monitor severe warnings issued by the National Weather Service and radar on our Severe Weather Tracking Station below. Also, comment below with conditions where you are.

Severe Weather Tracking Station
Warning Text: DC | MD | VA * NWS Local Storm Reports
Warnings: Severe alerts from National Weather Service. Updates w/o refresh (most browsers). Hint: Alert on map? Click matching label in key for details.

Keep reading for earlier updates...

5:50 p.m.: Another severe thunderstorm warning has been issued for a cell moving from northern Montgomery county into Howard county until 6:30 p.m. Areas affected include Olney, Columbia and Ellicott City. Damaging winds, dangerous lightning and heavy rain likely with this storm.

5:30 p.m. update: Strong to severe storms extend from central Loudoun county into western Montgomery county. A severe thunderstorm warning is in effect for southern Frederick, western Montgomery, eastern Loudoun and northwest Fairfax county until 6:15 p.m. These storms are headed southeast in the general direction of Poolesville, Ashburn, North Potomac and Herndon and may contain small hail, and damaging winds.