National Weather Service

Watches, Warnings & Advisories
NWS Homepage

3 products issued by NWS for: Washington DC
Share |

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
217 PM EDT Wed Sep 22 2021

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-Cecil-Southern Baltimore-
Prince Georges-Anne Arundel-Charles-St. Marys-Calvert-
Central and Southeast Montgomery-Central and Southeast Howard-
Southeast Harford-Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-
217 PM EDT Wed Sep 22 2021

This Hazardous Weather Outlook is for the Maryland portion of the
Chesapeake Bay, Tidal Potomac River, and I-95 corridor through
central Maryland, northern Virginia, and District of Columbia.

.DAY ONE...This Afternoon and Tonight

A few instances of damaging wind gusts or an isolated tornado are
possible with showers and isolated thunderstorms.

A Coastal Flood Warning goes into effect for Anne Arundel County
at 3 PM.

A Gale Warning is in effect for the lower tidal Potomac River and
the Chesapeake Bay and adjoining estuaries north of Smith Point

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A Flash Flood Watch is in effect for portions of the DC and
Baltimore metro areas through Thursday afternoon.

A Coastal Flood Warning remains in effect for Anne Arundel County
through Thursday morning.

Severe thunderstorms are possible Thursday. The main threats are
damaging wind gusts or an isolated tornado, though a few instances
of flooding can`t be ruled out.


Spotter activation may be needed through Thursday.


Flash Flood Watch

Flood Watch
National Weather Service Baltimore MD/Washington DC
146 PM EDT Wed Sep 22 2021

District of Columbia-Carroll-Northern Baltimore-Cecil-Southern
Baltimore-Northwest Montgomery-Central and Southeast Montgomery-
Northwest Howard-Central and Southeast Howard-Northwest Harford-
Southeast Harford-Fairfax-Arlington/Falls Church/Alexandria-Eastern
Including the cities of Elkton, Herndon, Arlington, Jarrettsville,
Westminster, Damascus, Silver Spring, Bethesda, Chantilly,
Centreville, Sterling, Reisterstown, Columbia, Ashburn, Germantown,
Leesburg, McLean, Rockville, Alexandria, Falls Church, Reston,
Baltimore, Eldersburg, Ellicott City, Franconia, Washington,
Annandale, Cockeysville, Lisbon, Gaithersburg, and Aberdeen
146 PM EDT Wed Sep 22 2021


The National Weather Service in Sterling Virginia has expanded the

* Flash Flood Watch to include portions of DC, Maryland and northern
  Virginia, including the following areas: in DC, District of
  Columbia. In Maryland, Carroll, Cecil, Central and Southeast
  Howard, Central and Southeast Montgomery, Northern Baltimore,
  Northwest Harford, Northwest Howard, Northwest Montgomery,
  Southeast Harford and Southern Baltimore. In northern Virginia,
  Arlington/Falls Church/Alexandria, Eastern Loudoun and Fairfax.

* From late tonight through Thursday afternoon.

* Multiple rounds of showers and scattered thunderstorms capable of
  producing heavy rain are expected through Thursday afternoon. The
  most widespread heavy rain is most likely late tonight through
  early Thursday afternoon. Average rainfall amounts of 1 to 2
  inches are expected, with localized higher amounts of up to 4
  inches possible. Heavy rain falling over increasingly saturated
  ground may result in flash flooding.


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



Coastal Flood Advisory

Coastal Hazard Message
National Weather Service Baltimore MD/Washington DC
939 AM EDT Wed Sep 22 2021

District of Columbia-
939 AM EDT Wed Sep 22 2021


* WHAT...Up to one foot of inundation above ground level in low
  lying areas due to tidal flooding.

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

* WHEN...Until noon EDT Thursday, especially around the time of
  high tide.

* 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. Minor shoreline inundation up to one foot
  above ground level is possible elsewhere.

* ADDITIONAL DETAILS...Tides one and a half to two feet above
  normal. The next high tides at Washington Channel are at 10:03
  PM this evening and 10:25 AM Thursday morning.


If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone




U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
Page last modified: May 16, 2007
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE