Event extended (both time and area). Flash Flood Watch from 9/8/2021 9:24 PM to 9/9/2021 4:00 AM EDT for Central Maryland, Delmarva/Southern MD. More information.
Interactive NWS Alert
Radar valid at 400 am EDT, Sep 9th 2021
District of Columbia-Prince Georges-Anne Arundel-Prince
Church/Alexandria-Western Loudoun-Eastern Loudoun-
Including the cities of Purcellville, South Gate, Bowie, Arlington,
Annapolis, Falls Church, Odenton, Chantilly, Centreville, Sterling,
College Park, Herndon, Severna Park, Greenbelt, Leesburg, McLean,
Camp Springs, Lake Ridge, Dale City, Suitland-Silver Hill, Arnold,
Manassas, Severn, Reston, Montclair, Alexandria, Clinton, Glen
Burnie, Ashburn, Woodbridge, Washington, Annandale, Laurel, and
924 PM EDT Wed Sep 8 2021
...FLASH FLOOD WATCH IN EFFECT UNTIL 4 AM EDT THURSDAY...
The National Weather Service in Sterling Virginia has expanded the
* Flash Flood Watch to include portions of DC, central Maryland and
northern Virginia, including the following areas: in DC, District
of Columbia. In central Maryland, Anne Arundel and Prince Georges.
In northern Virginia, Arlington/Falls Church/Alexandria, Eastern
Loudoun, Fairfax, Prince William/Manassas/Manassas Park and
* Until 4 AM EDT Thursday.
* Showers and scattered thunderstorms are expected tonight. Average
rainfall amounts of one-half to one inch is expected. However,
thunderstorms will contain very heavy rainfall with rainfall rates
around 1 to 3 inches per hour. Localized rainfall amounts of 2 to
4 inches are possible.
* Heavy amounts of rain in a short period of time may cause creeks
and streams to rapidly rise out of their banks as well as the
potential for flash-flooding in urban areas.
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
iNWS is an experimental service intended for NWS core partners,
including emergency managers, community leaders and other government