weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

5 products issued by NWS for:
Share |


Hazardous Weather Outlook

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
503 PM EDT THU JUL 28 2016

ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-292115-
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-SOUTHERN BALTIMORE-PRINCE GEORGES-
ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-SOUTHEAST HARFORD-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
503 PM EDT THU JUL 28 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE
CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN
CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF
COLUMBIA.

.DAY ONE...TONIGHT

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE ENTIRE AREA
UNTIL MIDNIGHT. DAMAGING WINDS ARE THE PRIMARY THREAT. AN ISOLATED
TORNADO IS POSSIBLE.

A FLASH FLOOD WATCH IS NOW IN EFFECT FOR THE ENTIRE BALTIMORE-
WASHINGTON METROPOLITAN AREA THIS AFTERNOON AND TONIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE FLASH FLOOD WATCH FOR THE BALTIMORE AND WASHINGTON AREAS REMAINS
IN EFFECT UNTIL 11 AM FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SKYWARN HAS BEEN ACTIVATED.

$$



Short Term Forecast

SHORT TERM FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
454 PM EDT THU JUL 28 2016

DCZ001-MDZ013-VAZ053-054-282115-
DISTRICT OF COLUMBIA-PRINCE GEORGES-ARLINGTON/FALLS
CHURCH/ALEXANDRIA-FAIRFAX-
454 PM EDT THU JUL 28 2016

...A STRONG THUNDERSTORM WILL AFFECT THE DISTRICT OF COLUMBIA...WEST
CENTRAL PRINCE GEORGES...NORTHEASTERN FAIRFAX AND ARLINGTON
COUNTIES...THE CITY OF FALLS CHURCH AND THE NORTHERN CITY OF
ALEXANDRIA...

AT 453 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER THE I66 AND
I495 INTERCHANGE...OR OVER VIENNA...MOVING EAST AT 25 MPH.

WINDS IN EXCESS OF 30 MPH...FREQUENT LIGHTNING AND VERY HEAVY RAIN
ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
ARLINGTON...ALEXANDRIA...ANNANDALE...VIENNA...FALLS CHURCH...CORAL
HILLS...BLADENSBURG...MANTUA...PIMMIT HILLS...GALLAUDET UNIVERSITY...
NATIONALS PARK...CRYSTAL CITY...REAGAN NATIONAL AIRPORT...RFK
STADIUM...HOWARD UNIVERSITY...MCLEAN...ROSSLYN...AMERICAN LEGION
BRIDGE...LANDOVER AND LINCOLNIA.

LOCALLY HEAVY RAINFALL IS OCCURRING WITH THIS STORM...AND MAY CAUSE
PONDING OF WATER ON ROADWAYS AND CAUSE SMALL STREAMS TO GO OUT OF
THEIR BANKS. BE ALERT FOR THE POTENTIAL OF STANDING WATER AND
HYDROPLANING.

LAT...LON 3880 7691 3882 7703 3884 7702 3885 7702
      3888 7704 3885 7703 3884 7705 3883 7704
      3882 7704 3885 7726 3899 7725 3897 7722
      3896 7715 3892 7711 3897 7690
TIME...MOT...LOC 2053Z 266DEG 20KT 3888 7723

$$

DH




Flash Flood Warning

FLASH FLOOD WARNING
DCC001-MDC031-282330-
/O.NEW.KLWX.FF.W.0042.160728T2031Z-160728T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
431 PM EDT THU JUL 28 2016

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE NORTHWESTERN DISTRICT OF COLUMBIA...
  SOUTHEASTERN MONTGOMERY COUNTY IN CENTRAL MARYLAND...

* UNTIL 730 PM EDT

* AT 431 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY
  FALLEN. ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE
  POSSIBLE. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT ARE EXPECTED TO EXPERIENCE FLOODING INCLUDE...
  ROCKVILLE...BETHESDA...GAITHERSBURG...OLNEY...FORT TOTTEN...
  AMERICAN LEGION BRIDGE...ASPEN HILL...POTOMAC...NORTH BETHESDA...
  NORTH POTOMAC...REDLAND...TAKOMA PARK...GREAT FALLS...KEMP MILL...
  CHEVY CHASE...NORTH KENSINGTON...SOUTH KENSINGTON...FOREST GLEN...
  MARTIN`S ADDITIONS AND NORTH CHEVY CHASE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON`T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3897 7699 3896 7700 3895 7698 3892 7710
      3896 7715 3897 7722 3898 7723 3898 7724
      3900 7725 3902 7724 3906 7733 3908 7735
      3915 7710

$$

DH




Flash Flood Watch

FLOOD WATCH
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
213 PM EDT THU JUL 28 2016


DCZ001-MDZ003>005-013-501>505-VAZ026>031-040-052>054-501-503>507-
WVZ050>053-055-501>506-290215-
/O.EXB.KLWX.FF.A.0009.160728T1813Z-160729T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL-
PRINCE GEORGES-EXTREME WESTERN ALLEGANY-
CENTRAL AND EASTERN ALLEGANY-NORTHWEST MONTGOMERY-
CENTRAL AND SOUTHEAST MONTGOMERY-NORTHWEST HOWARD-ROCKINGHAM-
SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-RAPPAHANNOCK-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-NORTHERN FAUQUIER-
WESTERN HIGHLAND-EASTERN HIGHLAND-WESTERN LOUDOUN-EASTERN LOUDOUN-
NORTHERN VIRGINIA BLUE RIDGE-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-
HARDY-WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-
WESTERN PENDLETON-EASTERN PENDLETON-
INCLUDING THE CITIES OF...WASHINGTON...HAGERSTOWN...FREDERICK...
BALLENGER CREEK...ELDERSBURG...WESTMINSTER...BOWIE...
SUITLAND-SILVER HILL...CLINTON...COLLEGE PARK...GREENBELT...
LAUREL...CAMP SPRINGS...FROSTBURG...CUMBERLAND...GERMANTOWN...
DAMASCUS...BETHESDA...ROCKVILLE...GAITHERSBURG...SILVER SPRING...
LISBON...HARRISONBURG...STRASBURG...WOODSTOCK...MOUNT JACKSON...
NEW MARKET...WINCHESTER...LURAY...SHENANDOAH...STANLEY...
FRONT ROYAL...BERRYVILLE...DALE CITY...MANASSAS...WOODBRIDGE...
LAKE RIDGE...MONTCLAIR...RESTON...HERNDON...ANNANDALE...
CENTREVILLE...CHANTILLY...MCLEAN...FRANCONIA...ARLINGTON...
ALEXANDRIA...WARRENTON...HIGHTOWN...MONTEREY...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...
FORT ASHBY...RIVERTON...BRANDYWINE...FRANKLIN...OAK FLAT...
RUDDLE...SUGAR GROVE
213 PM EDT THU JUL 28 2016

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS EXPANDED
THE

* FLASH FLOOD WATCH TO INCLUDE PORTIONS OF MARYLAND...THE
  DISTRICT OF COLUMBIA...VIRGINIA AND WEST VIRGINIA...INCLUDING
  THE FOLLOWING AREAS...IN MARYLAND...CARROLL...CENTRAL AND
  EASTERN ALLEGANY...CENTRAL AND SOUTHEAST MONTGOMERY...EXTREME
  WESTERN ALLEGANY...FREDERICK MD...NORTHWEST HOWARD...NORTHWEST
  MONTGOMERY...PRINCE GEORGES AND WASHINGTON. THE DISTRICT OF
  COLUMBIA. IN VIRGINIA...ARLINGTON/FALLS CHURCH/ALEXANDRIA...
  CLARKE...EASTERN HIGHLAND...EASTERN LOUDOUN...FAIRFAX...
  FREDERICK VA...NORTHERN FAUQUIER...NORTHERN VIRGINIA BLUE
  RIDGE...PAGE...PRINCE WILLIAM/MANASSAS/MANASSAS PARK...
  RAPPAHANNOCK...ROCKINGHAM...SHENANDOAH...WARREN...WESTERN
  HIGHLAND AND WESTERN LOUDOUN. IN WEST VIRGINIA...BERKELEY...
  EASTERN GRANT...EASTERN MINERAL...EASTERN PENDLETON...
  HAMPSHIRE...HARDY...JEFFERSON...MORGAN...WESTERN GRANT...
  WESTERN MINERAL AND WESTERN PENDLETON.

* THROUGH FRIDAY MORNING

* AN AREA OF LOW PRESSURE IS EXPECTED TO DEVELOP TONIGHT OVER
  SOUTHERN VIRGINIA AND TRACK NORTHEAST ACROSS NORTHEAST MARYLAND
  AND NEW JERSEY FRIDAY. SEVERAL ROUNDS OF SHOWERS AND
  THUNDERSTORMS DEVELOPING THIS AFTERNOON WILL CONTINUE INTO
  FRIDAY MORNING. GIVEN AMPLE MOISTURE AND INSTABILITY... SHOWERS
  AND THUNDERSTORMS WILL BE CAPABLE OF PRODUCING TORRENTIAL
  DOWNPOURS WITH RAINFALL RATES OF AN INCH OR TWO PER HOUR AT
  TIMES. THIS MAY RESULT IN FLASH FLOODING OF SMALL STREAMS...
  CREEKS AND URBAN AREAS.


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.

&&

$$



Severe Thunderstorm Watch

SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 418
NWS STORM PREDICTION CENTER NORMAN OK
125 PM EDT THU JUL 28 2016

SEVERE THUNDERSTORM WATCH 418 IS IN EFFECT UNTIL 1200 AM EDT
FOR THE FOLLOWING LOCATIONS

DCC001-290400-
/O.NEW.KWNS.SV.A.0418.160728T1725Z-160729T0400Z/

DC
.    DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE

DISTRICT OF COLUMBIA
$$




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