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Flash Flood Watch

Flood Watch
National Weather Service Baltimore MD/Washington DC
914 PM EDT Sun Jul 21 2019

District of Columbia-Washington-Frederick MD-Carroll-
Northern Baltimore-Southern Baltimore-Prince Georges-Anne Arundel-
Northwest Montgomery-Central and Southeast Montgomery-
Northwest Howard-Central and Southeast Howard-Northwest Harford-
Southeast Harford-Frederick VA-Clarke-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Western Loudoun-Eastern Loudoun-
Including the cities of Washington, Hagerstown, Frederick,
Ballenger Creek, Eldersburg, Westminster, Reisterstown,
Cockeysville, Baltimore, Bowie, Suitland-Silver Hill, Clinton,
College Park, Greenbelt, Laurel, Camp Springs, Glen Burnie,
Annapolis, Severn, South Gate, Severna Park, Arnold, Odenton,
Germantown, Damascus, Bethesda, Rockville, Gaithersburg,
Silver Spring, Lisbon, Columbia, Ellicott City, Jarrettsville,
Aberdeen, Winchester, Berryville, Dale City, Manassas,
Woodbridge, Lake Ridge, Montclair, Reston, Herndon, Annandale,
Centreville, Chantilly, McLean, Franconia, Arlington, Alexandria,
Falls Church, Purcellville, Leesburg, Ashburn, Sterling, Paw Paw,
Martinsburg, Charles Town, and Shepherdstown
914 PM EDT Sun Jul 21 2019


The Flash Flood Watch continues for

* Portions of Maryland, The District of Columbia, Virginia, and
  panhandle West Virginia, including the following areas, in
  Maryland, Anne Arundel, Carroll, Central and Southeast Howard,
  Central and Southeast Montgomery, Frederick MD, Northern
  Baltimore, Northwest Harford, Northwest Howard, Northwest
  Montgomery, Prince Georges, Southeast Harford, Southern
  Baltimore, and Washington. The District of Columbia. In
  Virginia, Arlington/Falls Church/Alexandria, Clarke, Eastern
  Loudoun, Fairfax, Frederick VA, Prince
  William/Manassas/Manassas Park, and Western Loudoun. In
  panhandle West Virginia, Berkeley, Jefferson, and Morgan.

* From Monday afternoon through late Monday night

* Multiple rounds of showers and thunderstorms capable of
  producing heavy rainfall are likely. Areal average rainfall of
  1 to 1.5 inches is expected, with isolated totals of 4 inches
  possible. Much of this rain may fall in short periods of time
  in any one given location, resulting in the risk for flash
  flooding Monday afternoon into Monday night.


A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

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



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
433 PM EDT Sun Jul 21 2019

Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Key Bridge to Indian Head MD-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-District of Columbia-Southern Baltimore-Prince Georges-
Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-
433 PM EDT Sun Jul 21 2019

This Hazardous Weather Outlook is for the Maryland portion of the
Chesapeake Bay, Tidal Potomac River, and adjacent counties in
central Maryland and northern Virginia as well as the District of

.DAY ONE...Tonight

An Excessive Heat Warning is in effect until 9 PM EDT this

Scattered thunderstorms will be capable of producing isolated
damaging wind gusts late this afternoon and tonight. Locally heavy
rain may lead to isolated instances of flooding as well.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A Flash Flood Watch is in effect Monday afternoon through Monday
night for the Washington DC and Baltimore MD metro areas.

A Heat Advisory is in effect for Calvert and St. Marys Counties
from 11 AM until 6 PM Monday.

Thunderstorms Monday afternoon and evening may produce damaging
wind gusts.


Spotter activation may be needed later this afternoon and
evening, and is likely Monday afternoon and evening.


U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
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