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Flash Flood Watch

Flood Watch
National Weather Service Baltimore MD/Washington DC
1051 AM EDT Fri Jul 28 2017

District of Columbia-Washington-Frederick MD-Carroll-
Northern Baltimore-Southern Baltimore-Prince Georges-Anne Arundel-
Charles-St. Marys-Calvert-Extreme Western Allegany-
Central and Eastern Allegany-Northwest Montgomery-
Central and Southeast Montgomery-Northwest Howard-
Central and Southeast Howard-Northwest Harford-Southeast Harford-
Shenandoah-Frederick VA-Page-Warren-Clarke-Greene-Madison-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
King George-Northern Fauquier-Southern Fauquier-Western Loudoun-
Eastern Loudoun-Northern Virginia Blue Ridge-Hampshire-Morgan-
Berkeley-Jefferson-Hardy-Western Grant-Eastern Grant-
Western Mineral-Eastern Mineral-
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,
St. Charles, Waldorf, Lexington Park, California,
Chesapeake Beach, Huntingtown, Dunkirk, North Beach, Lusby,
Prince Frederick, Frostburg, Cumberland, Germantown, Damascus,
Bethesda, Rockville, Gaithersburg, Silver Spring, Lisbon,
Columbia, Ellicott City, Jarrettsville, Aberdeen, Strasburg,
Woodstock, Mount Jackson, New Market, Winchester, Luray,
Shenandoah, Stanley, Front Royal, Berryville, Stanardsville,
Madison, Orange, Gordonsville, Culpeper, Dale City, Manassas,
Woodbridge, Lake Ridge, Montclair, Reston, Herndon, Annandale,
Centreville, Chantilly, McLean, Franconia, Arlington, Alexandria,
Falmouth, Fredericksburg, Dahlgren, Warrenton, Turnbull,
Purcellville, Leesburg, Ashburn, Sterling, Big Meadows, Romney,
Paw Paw, Martinsburg, Charles Town, Shepherdstown, Moorefield,
Bayard, Mount Storm, Petersburg, Elk Garden, Antioch, Keyser,
New Creek, Ridgeville, Russelldale, Headsville, and Fort Ashby
1051 AM EDT Fri Jul 28 2017


The Flash Flood Watch is now in effect for

* Portions of Maryland, The District of Columbia, Virginia, and
  West Virginia, including the following areas, in Maryland,
  Anne Arundel, Calvert, Carroll, Central and Eastern Allegany,
  Central and Southeast Howard, Central and Southeast
  Montgomery, Charles, Extreme Western Allegany, Frederick MD,
  Northern Baltimore, Northwest Harford, Northwest Howard,
  Northwest Montgomery, Prince Georges, Southeast Harford,
  Southern Baltimore, St. Marys, and Washington. The District of
  Columbia. In Virginia, Arlington/Falls Church/Alexandria,
  Clarke, Culpeper, Eastern Loudoun, Fairfax, Frederick VA,
  Greene, King George, Madison, Northern Fauquier, Northern
  Virginia Blue Ridge, Orange, Page, Prince
  William/Manassas/Manassas Park, Rappahannock, Shenandoah,
  Southern Fauquier, Spotsylvania, Stafford, Warren, and Western
  Loudoun. In West Virginia, Berkeley, Eastern Grant, Eastern
  Mineral, Hampshire, Hardy, Jefferson, Morgan, Western Grant,
  and Western Mineral.

* Through Saturday afternoon

* Low pressure will develop over the Mid Atlantic today and move
  slowly off the coast through Saturday. This system will have
  the potential to bring 3 inches or more of rain to the region
  through Saturday afternoon. Thunderstorms could cause locally
  higher rainfall amounts.

* Heavy rainfall may result in rapid rises in streams and
  creeks. This could quickly result in flooding...especially in
  low lying and poor drainage areas.


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.



Flash Flood Warning

Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
1231 PM EDT FRI JUL 28 2017

Montgomery MD-
1231 PM EDT FRI JUL 28 2017


At 1229 PM EDT, Doppler radar and automated rain gauges indicated
that heavy rain has been falling over the area. There have also been
numerous reports of flooding and water rescues. Widespread amounts
of 1.5 to 3.0 inches have occurred from near Gaithersburg to Takoma
Park and Silver Spring, with higher amounts west of Olney and near
Glenmont. Heavy rain continues in portions of the county, with an
additional inch or more still possible. Flash flooding is already
occurring, including along Rock Creek and Sligo Creek.

Some locations that will experience flooding include...
Germantown, Rockville, Bethesda, Gaithersburg, Olney, Langley Park,
Beltsville, Lowes Island, Aspen Hill, Potomac, North Bethesda,
Montgomery Village, North Potomac, Fairland, White Oak, Redland,
Takoma Park, Great Falls, Adelphi and Colesville.

This includes flood prone locations
Columbia Pike at Paint Branch...
Goldmine Road at Hawlings River...
Connecticut Avenue just north of the Beltway...
River Road at Cabin John Creek west of the Beltway...
University Boulevard at Sligo Creek...
Viers Mill Road at Rock Creek...
Beach Drive along Rock Creek...
Sligo Creek Parkway...
and Georgia Avenue at Brookeville Road at Reddy Branch.


Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Please report flooding to your local law enforcement agency when you
can do so safely.


LAT...LON 3918 7700 3917 7701 3914 7695 3913 7696
      3914 7693 3913 7689 3898 7699 3897 7701
      3900 7704 3893 7712 3897 7715 3898 7724
      3903 7726 3907 7736 3920 7734



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
1102 AM EDT Fri Jul 28 2017

Washington-Frederick MD-Carroll-Northern Baltimore-
Extreme Western Allegany-Central and Eastern Allegany-
Northwest Montgomery-Central and Southeast Montgomery-
Northwest Howard-Central and Southeast Howard-Northwest Harford-
Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke-
Northern Fauquier-Southern Fauquier-Western Highland-
Eastern Highland-Western Loudoun-Eastern Loudoun-
Northern Virginia Blue Ridge-Central Virginia Blue Ridge-
Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant-
Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton-
Eastern Pendleton-
1102 AM EDT Fri Jul 28 2017

This Hazardous Weather Outlook is for eastern West Virginia,
northern and central Virginia, and central and western Maryland
with the exception of Garrett County.

.DAY ONE...This Afternoon and Tonight

A Flash Flood Watch is in effect through Saturday afternoon.
Showers and thunderstorm with heavy rain are expected. Flash
flooding is likely. Gusty winds or an isolated tornado are
possible as well.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

A Flash Flood Watch continues through Saturday afternoon.


Spotter activation may be needed this afternoon through Saturday.


Flood Warning

Flood Warning
National Weather Service Baltimore MD/Washington DC
917 AM EDT Fri Jul 28 2017

...The National Weather Service in Sterling Va has issued a flood
warning for the following rivers in Maryland...

  Seneca Creek at Dawsonville affecting Montgomery County

 Heavy rain will develop across Montgomery County today and tonight.
 This heavy rain is likely to cause flooding along Seneca Creek.


Never attempt to drive through a flooded roadway...this is how most
flood deaths result.

Stay tuned to developments by listening to NOAA Weather radio...
television or radio stations...or visit our website at
You can also find us on Facebook by searching U.S. National Weather
Service Baltimore Washington.


917 AM EDT Fri Jul 28 2017

The National Weather Service in Sterling Va has issued a
* Flood Warning for
  The Seneca Creek at Dawsonville.
* From this afternoon until Saturday afternoon.
* At 9 AM Friday the stage was 2.1 feet and steady.
* Flood stage is 7.5 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by late tonight and crest
  near 7.7 feet by tomorrow morning. The river will fall below flood
  stage by late tomorrow morning. Heavier rain may cause the creek to
  rise above flood stage sooner, so be prepared as early as this
* Impact...At 7.5 feet...Portions of the Seneca Creek Greenway are
  flooded. A small portion of Berryville Road west of Darnestown
  begins to flood.
* Flood history...This crest compares to a previous crest of 7.6 feet
  on Feb 4 2016.


River        Flood    Observed     2PM  8PM  2AM  8AM        Crest
Location     Stage  Stg Day Time   Fri  Fri  Sat  Sat   Stg Day Time

Seneca Creek
Dawsonville    7.5  2.1 Fri 9 AM   2.1  2.6  4.7  7.7   7.7 Sat 8 AM

Please note that heavier rain may cause the creek to rise faster than
this forecast indicates. This is why the flood warning begins this


LAT...LON 3914 7736 3914 7730 3912 7729 3909 7730
      3907 7731 3907 7736 3910 7736


U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
Page last modified: May 16, 2007
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