National Weather Service

Watches, Warnings & Advisories
NWS Homepage

2 products issued by NWS for: Sterling VA
Share |

Hazardous Weather Outlook

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

Washington-Frederick MD-Carroll-Northern Baltimore-
Northwest Montgomery-Northwest Howard-Northwest Harford-Augusta-
Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke-Nelson-
Northern Fauquier-Southern Fauquier-Western Loudoun-
Eastern Loudoun-Northern Virginia Blue Ridge-
Central Virginia Blue Ridge-Hampshire-Morgan-Berkeley-Jefferson-
807 PM EDT Wed Sep 22 2021

This Hazardous Weather Outlook is for portions of eastern West
Virginia, northern and central Virginia, and central and western

.DAY ONE...Tonight

A Flash Flood Watch is in effect for portions of the area along
and west of US Route 15 through tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Flash Flood Watch continues through 8 AM Thursday for portions of
the area along and west of US Route 15.

Severe thunderstorms are possible Thursday east of the Blue Ridge
and Catoctin Mountains. The main threats are damaging wind gusts
or an isolated tornado.


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.



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