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Maryland, Calvert

Severe Thunderstorm Watch

Statement as of 2:27 PM EDT on August 18, 2017

Expires 9:00 PM EDT on August 18, 2017



The National Weather Service has issued Severe Thunderstorm Watch
455 in effect until 9 PM EDT this evening for the following areas

The District of Columbia

In Maryland this watch includes 13 counties

In central Maryland

Anne Arundel Howard Montgomery
Prince Georges

In north central Maryland

Carroll Frederick Washington

In northern Maryland

Baltimore Baltimore City Harford

In southern Maryland

Calvert Charles St. Marys

In Virginia this watch includes 20 counties

In central Virginia

City of Fredericksburg Greene
King George Orange Spotsylvania

In northern Virginia

Arlington city of Alexandria City of Fairfax
City of Falls Church City of Manassas
City of Manassas Park Culpeper
Fairfax Fauquier Loudoun
Prince William Stafford

In northwest Virginia

Clarke Madison Rappahannock

In West Virginia this watch includes 2 counties

In Panhandle West Virginia

Berkeley Jefferson

This includes the cities of Aberdeen, Alexandria, Annapolis,
Arlington, Arnold, Aspen Hill, ballenger creek, Baltimore,
Bel Air, Berryville, Bethesda, Bowie, California, Camp Springs,
Catonsville, Chantilly, Charles Town, Chesapeake Beach, Clinton,
College Park, Columbia, Culpeper, Dahlgren, Dundalk, Dunkirk,
Edgewood, Eldersburg, Ellicott City, Essex, Fairfax,
Falls church, Fallston, Falmouth, Frederick, Fredericksburg,
Gaithersburg, Germantown, Glen Burnie, Gordonsville, Greenbelt,
Hagerstown, Havre de Grace, Herndon, Huntingtown, Joppatowne,
Laurel, Leesburg, Lexington Park, Lusby, Madison, Manassas,
Manassas Park, Martinsburg, McLean, North Beach, Odenton, Orange,
Parkville, Pikesville, Potomac, Prince Frederick, Randallstown,
Reston, Rockville, Severn, Severna Park, Shepherdstown,
Silver Spring, South Gate, Spotsylvania courthouse, St. Charles,
Stanardsville, Sterling, Suitland-Silver Hill, Towson, Waldorf,
Warrenton, Washington, Washington, Westminster, and Woodbridge.




Flash Flood Watch

Statement as of 12:35 PM EDT on August 18, 2017

Expires 2:00 AM EDT on August 19, 2017


... Flash Flood Watch in effect through late tonight...

The National Weather Service in Sterling Virginia has issued a

* Flash Flood Watch 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,
Culpeper, eastern Loudoun, Fairfax, King George, Madison,
northern Fauquier, Orange, Prince William/Manassas/Manassas
Park, Rappahannock, southern Fauquier, Spotsylvania, Stafford,
and western Loudoun.

* Through late tonight

* thunderstorms with heavy rainfall are expected across the region
this afternoon and evening. The potential for training
thunderstorms exists, which could result in several inches of
rain in one to two hours. Soils are already very moist, meaning
most of this rain would rapidly run off.

* Runoff from excessive rainfall may cause rapid rises of water
in low-lying and poor drainage areas as well as streams and
creeks, resulting in flash flooding. Urban areas will be most
susceptible.

Precautionary/preparedness actions...

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.



Rcm



Public Information Statement

Statement as of 12:00 PM EDT on August 18, 2017

Expires 3:00 PM EDT on August 18, 2017


... Public information statement...

... Severe weather safety rules...

Damaging thunderstorms are possible this afternoon and evening.
Residents all across the Baltimore and Washington DC Metro
areas... north and central Virginia... much of Maryland and the
eastern West Virginia Panhandle should monitor this situation very
closely and ensure your NOAA weather radios are set to alert Mode.
Severe weather warnings may become necessary. Here are some safety
rules to keep in mind when severe weather is expected or is
occurring.

If a warning is issued... seek shelter indoors immediately. A severe
thunderstorm is defined as producing quarter size or greater hail
and wind gusts of 58 mph or more.

Tornadoes often form very rapidly from severe thunderstorms. If
you are in a Tornado Watch... and a Severe Thunderstorm Warning is
issued for your area... monitor local conditions closely and be
ready to take quick action to save your life.

Stay tuned to NOAA Weather Radio... commercial radio or television
for the latest on this potential severe weather event. Additional
weather information... can be found at weather.Gov/Washington or
weather.Gov/Baltimore.



1200 PM EDT Fri Aug 18 2017

... Public information statement...

... Severe weather safety rules...

Damaging thunderstorms are possible this afternoon and evening.
Residents all across the Baltimore and Washington DC Metro
areas... north and central Virginia... much of Maryland and the
eastern West Virginia Panhandle should monitor this situation very
closely and ensure your NOAA weather radios are set to alert Mode.
Severe weather warnings may become necessary. Here are some safety
rules to keep in mind when severe weather is expected or is
occurring.

If a warning is issued... seek shelter indoors immediately. A severe
thunderstorm is defined as producing quarter size or greater hail
and wind gusts of 58 mph or more.

Tornadoes often form very rapidly from severe thunderstorms. If
you are in a Tornado Watch... and a Severe Thunderstorm Warning is
issued for your area... monitor local conditions closely and be
ready to take quick action to save your life.

Stay tuned to NOAA Weather Radio... commercial radio or television
for the latest on this potential severe weather event. Additional
weather information... can be found at weather.Gov/Washington or
weather.Gov/Baltimore.


Flash Flood Watch

Statement as of 12:35 PM EDT on August 18, 2017

Expires 2:00 AM EDT on August 19, 2017


... Flash Flood Watch in effect through late tonight...

The National Weather Service in Sterling Virginia has issued a

* Flash Flood Watch 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,
Culpeper, eastern Loudoun, Fairfax, King George, Madison,
northern Fauquier, Orange, Prince William/Manassas/Manassas
Park, Rappahannock, southern Fauquier, Spotsylvania, Stafford,
and western Loudoun.

* Through late tonight

* thunderstorms with heavy rainfall are expected across the region
this afternoon and evening. The potential for training
thunderstorms exists, which could result in several inches of
rain in one to two hours. Soils are already very moist, meaning
most of this rain would rapidly run off.

* Runoff from excessive rainfall may cause rapid rises of water
in low-lying and poor drainage areas as well as streams and
creeks, resulting in flash flooding. Urban areas will be most
susceptible.

Precautionary/preparedness actions...

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.



Rcm



Weather Severe Map
Alaska - Areal Flood Advisory , Record Report
Arizona - Air Quality Alert
Arkansas - Flood Warning , Record Report , Public Information Statement
California - Record Report
Colorado -
Connecticut - Severe Thunderstorm Watch , Flash Flood Watch , Public Information Statement
Delaware - Severe Thunderstorm Watch , Flash Flood Watch , Public Information Statement
District of Columbia - Severe Thunderstorm Watch , Flash Flood Watch , Heat Advisory , Public Information Statement
Florida - Coastal Hazard Statement , Areal Flood Advisory , Special Statement , Record Report
Georgia - Record Report
Hawaii - Special Statement , Record Report
Idaho - Fire Weather Warning
Illinois - Public Information Statement
Indiana - Beach Hazard Statement , Record Report
Iowa - Public Information Statement
Louisiana - Flood Warning , Heat Advisory , Record Report
Maryland - Severe Thunderstorm Watch , Flash Flood Watch, Coastal Flood Advisory , Flash Flood Watch , Heat Advisory , Special Statement , Public Information Statement
Massachusetts - Severe Thunderstorm Watch , Special Statement
Michigan - Beach Hazard Statement , Record Report , Public Information Statement , Public Information Statement
Minnesota - Special Statement , Public Information Statement , Public Information Statement
Mississippi - Flood Warning
Missouri - Public Information Statement
Montana - Fire Weather Warning , Air Quality Alert
Nebraska - Areal Flood Warning
Nevada -
New Jersey - Severe Thunderstorm Watch , Flash Flood Watch , Public Information Statement
New Mexico -
New York - Severe Thunderstorm Watch , Flash Flood Watch , Areal Flood Advisory , Special Statement , Beach Hazard Statement , Public Information Statement , Public Information Statement
North Carolina - Heat Advisory , Special Statement , Record Report
North Dakota - Fire Weather Watch
Ohio - Beach Hazard Statement
Oklahoma - Flood Warning
Oregon - Fire Weather Warning , Air Quality Alert
Pennsylvania - Severe Thunderstorm Watch , Flash Flood Watch , Areal Flood Advisory , Areal Flood Advisory, Flash Flood Watch , Special Statement , Beach Hazard Statement , Public Information Statement
Rhode Island - Special Statement
South Carolina - Heat Advisory
Texas - Flood Warning , Areal Flood Advisory , Heat Advisory , Special Statement , Record Report
Virgin Islands - Coastal Hazard Statement
Virginia - Severe Thunderstorm Watch , Flash Flood Watch , Heat Advisory , Special Statement , Public Information Statement
Washington - Fire Weather Warning
West Virginia - Severe Thunderstorm Watch , Public Information Statement
Wisconsin - Public Information Statement
- Severe Thunderstorm Watch
- Small Craft Advisory

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