Montgomery County, Maryland
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The National Weather Service's Watches, Warnings and Advisories by state counties include: Thunderstorm, Tornado, Flood, Flash Flood, Winter Storm, High Wind, Gale, Small Aircraft, High Surf, Marine, Heat, Air Quality, Ashfall, Hazardous, and Special Statements.
Weather Alerts: Montgomery County, Maryland
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Flash Flood Watch
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-Rappahannock-Culpeper-
Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-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, Culpeper,
Dale City, Manassas, Woodbridge, Lake Ridge, Montclair, Reston,
Herndon, Annandale, Centreville, Chantilly, McLean, Franconia,
Arlington, Alexandria, Falmouth, 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
350 AM EDT Fri Jul 28 2017


The Flash Flood Watch continues 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, King
George, Northern Fauquier, Northern Virginia Blue Ridge, Page,
Prince William/Manassas/Manassas Park, Rappahannock,
Shenandoah, Southern Fauquier, Stafford, Warren, and Western
Loudoun. In West Virginia, Berkeley, Eastern Grant, Eastern
Mineral, Hampshire, Hardy, Jefferson, Morgan, Western Grant,
and Western Mineral.

* From 2 PM EDT this afternoon 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.


Flood Warning
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


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