Update, 11:30 p.m.: Shower intensity has generally decreased across the area even as showers have moved back into D.C. and new showers have popped up in Montgomery County. Scattered showers continue into the overnight, some could be moderate to heavy.

Update, 10:20 p.m.: The flash flood warning for Washington, D.C. expired, but large area of heavy rain slowly approaching from the west. Up to 1” of rain in the last hour around Burke. Additional flooding possible overnight in D.C. and elsewhere.

Update, 9:45 p.m.: Rain has tapered off in D.C. but more may be on the way overnight and again tomorrow. Most impressive totals: Children’s Hospital: 3.48”, Howard University: 2.38” Photo: Flooding in Bloomingdale DC (via @drewsephg)

Update, 9:35 p.m.: Due to flooding, Rhode Island Avenue NW closed between the 100 and 200 block and, in Adams Morgan, 2900 block of Sherman Avenue closed

Update, 9:25 p.m.: For news on the flooding that just occurred in D.C., see also this article: Rain severely floods streets and Metro just north of downtown D.C.

Update, 9:20 p.m.: Rain is starting to let up in D.C., though some showers linger in the eastern sections. I imagine the warning will be lifted at 10 p.m. Note, however, some very heavy rain is falling west of town, from southwest Fairfax county and to the west through northern Prince William county, northern Fauquier county, and central Loudoun county. We’ll watch this activity and let you know if additional warnings are issued.

Update, 9:15 p.m.: Green/Yellow Line service suspended between Mt. Vernon Square and Georgia Ave. due to flooding. The Columbia Heights, U Street and Shaw stations are all closed.

Update, 9:05 p.m.: WTOP reports: “The D.C. Fire Department is responding to flooding at Rhode Island and Florida avenues NE at 1st and 2nd streets. Several cars are underwater and D.C. Fire says people may be trapped in their cars.”

Update, 9:00 p.m.: WMATA tweets: “Shaw-Howard University Station currently closed b/c of flooding. As shuttles enter service, use Metrobus Route 70”

Update, 8:55 p.m.: Rain is starting to diminish in coverage and intensity over D.C. and has shifted more towards the eastern half of the city. See this photo of flooding on our Facebook page: Car partially submerged near intersection 1st and Rhode Island Ave. NE

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. Continue reading below the Severe Weather Tracking Station for earlier flooding updates

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.

Update, 8:50 p.m.: Weatherbug tweets Children’s Hospital received 2.97” of rain in about 20 minutes. (note that seems almost too high to be real)

Update, 8:45 p.m.: NBC4’s Kim Martucci tweets: “WTOP reporting cars under water here, in DC between Florida & Rhode Is. Aves / 1st & 2nd Streets NE”

Update 8:40 p.m.: Children’s Hospital, just north of downtown has received 3.32” of rain today, mostly from current storm.

Update, 8:35 p.m.: In last hour, 1.62” of rain has fallen at Howard University tweets Steve Rudin of WJLA.

Update, 8:26 p.m.: A Twitter photo shows water flooding Howard University, Green Line metro stop

Water FLOODING the Howard University stop on Green Line @wmata @unsuckdcmetro twitter.com/AnaSantosPhoto…

— Ana Santos (@AnaSantosPhoto) September 3, 2012

Update, 8:20 p.m.: A Twitter follower reports Bloomingdale is flooded.

Original post: A very heavy thundershower has developed over Washington, D.C. and stalled. In the last hour, torrential rain has produced 1-2” in parts of the District, especially the northern two-thirds.

The National Weather Service has issued a Flash Flood Warning as another 1” of rain is possible through 10 p.m.

The heaviest rain has occurred around Columbia Heights, downtown , and the Bloomingdale area - which is especially prone to flooding. It has already flooded three times this summer.

Use extra caution when driving and do not attempt to cross a flooded road in your vehicle. Turn around, don’t drown!