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Radar valid at 1000 pm EDT, Aug 30th 2021

alert legend

DCZ001-MDZ006-011-013-014-503>508-VAZ038>040-051>054-501-502-505>507-
310000-
/O.NEW.KLWX.FF.A.0015.210830T1800Z-210831T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
/O.CON.KLWX.FF.A.0014.210901T1500Z-210902T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
District of Columbia-Northern Baltimore-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 Ridge-
Including the cities of Silver Spring, South Gate, Bowie, Arlington,
Annapolis, Manassas, Odenton, Damascus, Falls Church, Purcellville,
Bethesda, Chantilly, Culpeper, Centreville, Sterling, College Park,
Reisterstown, Columbia, Warrenton, Herndon, Severna Park, Greenbelt,
Germantown, Leesburg, McLean, Camp Springs, Rockville,
Jarrettsville, Arnold, Dale City, Big Meadows, Suitland-Silver Hill,
Lake Ridge, Gaithersburg, Severn, Reston, Montclair, Baltimore,
Madison, Alexandria, Clinton, Glen Burnie, Ashburn, Ellicott City,
Woodbridge, Stanardsville, Washington, Annandale, Franconia,
Cockeysville, Lisbon, Laurel, Turnbull, and Aberdeen
1148 AM EDT Mon Aug 30 2021

...FLASH FLOOD WATCH IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...FLASH FLOOD WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH THURSDAY MORNING...

The National Weather Service in Sterling Virginia has issued a

* Flash Flood Watch for portions of DC, Maryland and Virginia,
including the following areas: in DC, District of Columbia. In
Maryland, Anne Arundel, Central and Southeast Howard, Central and
Southeast Montgomery, 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.

* Until 10 PM EDT this evening.

* Scattered to numerous showers and thunderstorms are likely this
afternoon and evening, some of which may produce a few inches of
rain in a short period of time.

* Heavy rainfall in a short period of time would result in rapid
rises of water in small streams and creeks, and in urban and poor
drainage areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

The Flash Flood Watch continues for

* Portions of DC, Maryland and Virginia, including the following
areas: in DC, District of Columbia. In Maryland, Anne Arundel,
Central and Southeast Howard, Central and Southeast Montgomery,
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.

* From Wednesday morning through Thursday morning.

* The remnants of Ida will interact with a stalled front, resulting
in a prolonged period of heavy rainfall beginning Wednesday
morning and continuing through Wednesday night. 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 agencies only.