Interactive NWS Alert
Radar valid at 1200 pm EDT, Aug 20th 2021
District of Columbia-Prince Georges-Northwest Montgomery-Central and
Orange-Culpeper-Prince William/Manassas/Manassas Park-Fairfax-
Fauquier-Southern Fauquier-Western Loudoun-Eastern Loudoun-Northern
Virginia Blue Ridge-Central Virginia Blue Ridge-
Including the cities of Silver Spring, Bethesda, Bowie, Arlington,
Manassas, Damascus, Falls Church, Purcellville, Lovingston,
Charlottesville, Chantilly, Orange, Culpeper, Centreville,
Wintergreen, Sterling, College Park, Fredericksburg, Falmouth,
Herndon, Ashburn, Greenbelt, Germantown, Leesburg, McLean, Camp
Springs, Rockville, Lake Ridge, Dale City, Suitland-Silver Hill,
Laurel, Reston, Montclair, Turnbull, Madison, Alexandria, Clinton,
Woodbridge, Stanardsville, Washington, Annandale, Warrenton, Big
Meadows, Gaithersburg, Gordonsville, and Franconia
211 PM EDT Thu Aug 19 2021
...FLASH FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Watch for portions of DC, central Maryland and
Virginia, including the following areas: in DC, District of
Columbia. In central Maryland, Central and Southeast Montgomery,
Northwest Montgomery and Prince Georges. In Virginia, Albemarle,
Arlington/Falls Church/Alexandria, Central Virginia Blue Ridge,
Culpeper, Eastern Loudoun, Fairfax, Greene, Madison, Nelson,
Northern Fauquier, Northern Virginia Blue Ridge, Orange, Prince
William/Manassas/Manassas Park, Rappahannock, Southern Fauquier,
Spotsylvania, Stafford and Western Loudoun.
* From 2 AM EDT Friday through Friday morning.
* Scattered to numerous showers and thunderstorms are expected.
Although isolated thunderstorms capable of heavy rain are possible
this evening near and southwest of the DC metro area, the bulk of
the threat is expected to be overnight into Friday morning.
Thunderstorms may be capable of producing heavy rainfall of 1 to 2
inches per hour.
* Heavy rainfall may result in rapid rises on streams, creeks, and
in urban and poor drainage areas. This will especially be the case
where repetitive or persistent thunderstorm activity occurs.
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