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Coastal Flood Advisory

Coastal Hazard Message
National Weather Service Baltimore MD/Washington DC
651 PM EDT Sun Jul 22 2018

District of Columbia-
651 PM EDT Sun Jul 22 2018


* LOCATIONS...Shoreline in the District of Columbia.

* TIDAL DEPARTURE...One to two feet above normal.

* TIMING...Around the time of high tide Monday morning. High tide
  is at 5:34 AM Monday morning.

* IMPACTS...Shoreline inundation is expected along portions of
  the seawall adjacent to Ohio Drive and the Hains Point Loop
  Road, and near the Tidal Basin and Jefferson Memorial. Minor
  shoreline inundation up to one foot above ground is possible


A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.



Flash Flood Watch

Flood Watch
National Weather Service Baltimore MD/Washington DC
506 PM EDT Sun Jul 22 2018

District of Columbia-Frederick MD-Carroll-Northern Baltimore-
Southern Baltimore-Prince Georges-Anne Arundel-Charles-St. Marys-
Calvert-Northwest Montgomery-Central and Southeast Montgomery-
Northwest Howard-Central and Southeast Howard-Northwest Harford-
Southeast Harford-Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-Eastern Loudoun-
Including the cities of Washington, 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, St. Charles, Waldorf,
Lexington Park, California, Chesapeake Beach, Huntingtown,
Dunkirk, North Beach, Lusby, Prince Frederick, Germantown,
Damascus, Bethesda, Rockville, Gaithersburg, Silver Spring,
Lisbon, Columbia, Ellicott City, Jarrettsville, Aberdeen,
Dale City, Manassas, Woodbridge, Lake Ridge, Montclair, Reston,
Herndon, Annandale, Centreville, Chantilly, McLean, Franconia,
Arlington, Alexandria, Falmouth, Fredericksburg, Dahlgren,
Leesburg, Ashburn, and Sterling
506 PM EDT Sun Jul 22 2018


The Flash Flood Watch continues for

* Portions of Maryland, The District of Columbia, and Virginia,
  including the following areas, in Maryland, Anne Arundel,
  Calvert, Carroll, Central and Southeast Howard, Central and
  Southeast Montgomery, Charles, Frederick MD, Northern
  Baltimore, Northwest Harford, Northwest Howard, Northwest
  Montgomery, Prince Georges, Southeast Harford, Southern
  Baltimore, and St. Marys. The District of Columbia. In
  Virginia, Arlington/Falls Church/Alexandria, Eastern Loudoun,
  Fairfax, King George, Prince William/Manassas/Manassas Park,
  Spotsylvania, and Stafford.

* Until midnight EDT tonight

* Periods of showers and thunderstorms will continue into the
  evening. There is potential for repetitive rounds of
  precipitation. Combined with saturated ground and high stream
  levels from Saturday`s rainfall, this precipitation could lead
  to flash flooding.

* Urban areas, locations along small streams and creeks, and
  poor drainage areas are most vulnerable to flash flooding.


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
443 PM EDT Sun Jul 22 2018

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-
443 PM EDT Sun Jul 22 2018

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

A Flash Flood Watch is in effect until midnight tonight for the
entire outlook area.

Thunderstorms may produce isolated damaging wind gusts this
afternoon and evening. Scattered showers and storms with gusty
winds over the waters may also require Special Marine Warnings.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Scattered to numerous incidents of flooding are likely Monday
into Wednesday. Flash Flood Watches will likely be required.


Spotter activation is not expected at this time.


U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
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