Event extended (time). Flash Flood Watch from 9/1/2021 4:04 AM to 9/2/2021 8:00 AM EDT for Central Maryland, Delmarva/Southern MD, Southern PA. More information.
Interactive NWS Alert
Radar valid at 800 am EDT, Sep 2nd 2021
District of Columbia-Frederick MD-Carroll-Northern Baltimore-Cecil-
Southern Baltimore-Prince Georges-Anne Arundel-Northwest Montgomery-
Central and Southeast Montgomery-Northwest Howard-Central and
Southeast Howard-Northwest Harford-Southeast Harford-Greene-Madison-
Rappahannock-Culpeper-Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Northern Fauquier-Southern
Fauquier-Western Loudoun-Eastern Loudoun-Northern Virginia Blue
Including the cities of Elkton, South Gate, Bowie, Arlington,
Annapolis, Manassas, Odenton, Westminster, Damascus, Falls Church,
Silver Spring, Purcellville, Bethesda, Chantilly, Culpeper,
Ballenger Creek, Centreville, Sterling, College Park, Reisterstown,
Columbia, Warrenton, Herndon, Alexandria, Severna Park, Greenbelt,
Germantown, Leesburg, McLean, Camp Springs, Rockville,
Jarrettsville, Frederick, Arnold, Dale City, Big Meadows,
Suitland-Silver Hill, Lake Ridge, Gaithersburg, Severn, Reston,
Montclair, Baltimore, Madison, Eldersburg, Clinton, Glen Burnie,
Ashburn, Ellicott City, Woodbridge, Stanardsville, Washington,
Annandale, Franconia, Cockeysville, Lisbon, Laurel, Turnbull, and
404 AM EDT Wed Sep 1 2021
...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THURSDAY MORNING...
The Flash Flood Watch is now in effect for
* Portions of DC, Maryland and Virginia, including the following
areas: in DC, District of Columbia. In Maryland, Anne Arundel,
Carroll, Cecil, Central and Southeast Howard, Central and
Southeast Montgomery, Frederick MD, Northern Baltimore, Northwest
Harford, Northwest Howard, Northwest Montgomery, Prince Georges,
Southeast Harford and Southern Baltimore. In Virginia,
Arlington/Falls Church/Alexandria, Culpeper, Eastern Loudoun,
Fairfax, Greene, Madison, Northern Fauquier, Northern Virginia
Blue Ridge, Prince William/Manassas/Manassas Park, Rappahannock,
Southern Fauquier and Western Loudoun.
* Through Thursday morning.
* A round of heavy thunderstorms early this morning may result in
localized flash flooding, especially in the Washington and
Baltimore Metropolitan Areas. Additional thunderstorms with heavy
rainfall are expected across the area this afternoon and evening.
Rainfall amounts of 2 to 4 inches are expected, with localized
amounts up to 6 inches possible.
* This amount of heavy rainfall will not only result in the
potential for considerable flash flooding of creeks, small
streams, and urban areas, but also the potential for river
flooding on the main stem rivers.
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