Weather

Update at 4:15 p.m. — The storm is arriving.

Hearing reports of downed power lines and a blown transformer as winds pick up ahead of storm. Some power outages reported.

— Arlington News (@ARLnowDOTcom) July 18, 2016

Update at 4:05 p.m. — A Severe Thunderstorm Warning has now been issued.

SEVERE THUNDERSTORM WARNING FROM 3:45PM EDT MON UNTIL 4:30PM EDT MON

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR… SOUTHWESTERN MONTGOMERY COUNTY IN CENTRAL MARYLAND… FAIRFAX COUNTY IN NORTHERN VIRGINIA… NORTHWESTERN PRINCE WILLIAM COUNTY IN NORTHERN VIRGINIA… THE NORTH CENTRAL CITY OF MANASSAS IN NORTHERN VIRGINIA… THE CITY OF FALLS CHURCH IN NORTHERN VIRGINIA… NORTHWESTERN ARLINGTON COUNTY IN NORTHERN VIRGINIA… SOUTHEASTERN LOUDOUN COUNTY IN NORTHERN VIRGINIA… THE CITY OF MANASSAS PARK IN NORTHERN VIRGINIA… THE CITY OF FAIRFAX IN NORTHERN VIRGINIA… NORTH CENTRAL FAUQUIER COUNTY IN NORTHERN VIRGINIA…

* UNTIL 430 PM EDT

* AT 345 PM EDT… SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE EXTENDING FROM BROADLANDS TO NEAR HAYMARKET… MOVING EAST AT 40 MPH.

HAZARD… 60 MPH WIND GUSTS.

SOURCE… RADAR INDICATED.

IMPACT… DAMAGING WINDS WILL CAUSE SOME TREES AND LARGE BRANCHES TO FALL. THIS COULD INJURE THOSE OUTDOORS… AS WELL AS DAMAGE HOMES AND VEHICLES. ROADWAYS MAY BECOME BLOCKED BY DOWNED TREES. LOCALIZED POWER OUTAGES ARE POSSIBLE. UNSECURED LIGHT OBJECTS MAY BECOME PROJECTILES.

* LOCATIONS IMPACTED INCLUDE… ARLINGTON… GERMANTOWN… CENTREVILLE… ROCKVILLE… BETHESDA… GAITHERSBURG… RESTON… LEESBURG… ANNANDALE… OLNEY… SPRINGFIELD… SOUTH RIDING… HERNDON… FAIRFAX… VIENNA… FALLS CHURCH… BROADLANDS… LANSDOWNE… LOWES ISLAND AND BRAMBLETON. GET INDOORS TO PROTECT YOURSELF FROM WIND AND LIGHTNING. TREES AROUND YOU MAY BE DOWNED FROM DAMAGING WINDS… SO IF YOU ARE NEAR LARGE TREES… MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. DON’T DRIVE UNDERNEATH TREES OR IN WOODED AREAS UNTIL THE THREAT HAS PASSED.

Arlington County and surrounding areas are under a Severe Thunderstorm Watch through 8 p.m. tonight.

The National Weather Service says damaging storms are possible.

From NWS:

SEVERE THUNDERSTORM WATCH FROM 1:45PM EDT MON UNTIL 8PM EDT MON

VA . VIRGINIA COUNTIES INCLUDED ARE

ARLINGTON CLARKE CULPEPER FAIRFAX FAUQUIER FREDERICK GREENE KING GEORGE LOUDOUN MADISON ORANGE PAGE PRINCE WILLIAM RAPPAHANNOCK ROCKINGHAM SHENANDOAH SPOTSYLVANIA STAFFORD WARREN

VIRGINIA INDEPENDENT CITIES INCLUDED ARE

ALEXANDRIA FAIRFAX FALLS CHURCH FREDERICKSBURG HARRISONBURG MANASSAS MANASSAS PARK WINCHESTER

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 PARTS OF 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.

Severe Thunderstorm Watch until 8 PM (see graphic). Main threats are locally severe wind gusts and large hail! pic.twitter.com/rr9cYFpPV2

— NWS DC/Baltimore (@NWS_BaltWash) July 18, 2016

Flickr pool photo by Joseph Gruber

Arlington County is under a Severe Thunderstorm Watch tonight.

Forecasters say severe storms are “likely” late this afternoon and early this evening.

From the National Weather Service:

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM FOR THE OUTLOOK AREA. SEVERE THUNDERSTORMS ARE LIKELY THROUGH EARLY THIS EVENING. THE PRIMARY THREATS WILL BE DAMAGING WIND GUSTS AND LARGE HAIL. AN ISOLATED TORNADO CANNOT BE RULED OUT.

Arlington County is under a Severe Thunderstorm Watch through 10 p.m. tonight.

The National Weather Service says that isolated severe storms with gusty winds and heavy rains are possible.

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING ACROSS THE OUTLOOK AREA INCLUDING THE WATERS. LOCALLY DAMAGING WIND GUSTS ARE THE PRIMARY THREAT.

LOCALLY HEAVY RAIN IS POSSIBLE WITH THE THUNDERSTORMS LATE THIS AFTERNOON AND EVENING. IF REPETITIVE OR PERSISTENT THUNDERSTORMS OCCUR…ISOLATED FLASH FLOODING COULD OCCUR…PARTICULARLY IN URBAN AREAS.

Update at 5:55 p.m. — A Flash Flood Warning has also been issued for the area, through 8:45 p.m.

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* FLASH FLOOD WARNING

* UNTIL 845 PM EDT

* AT 551 PM EDT…DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE AREA. FLASH FLOODING IS EXPECTED TO BEGIN
SHORTLY.

* SOME LOCATIONS THAT ARE EXPECTED TO EXPERIENCE FLOODING INCLUDE… ARLINGTON…ALEXANDRIA…BETHESDA…ANNANDALE…CLINTON… SPRINGFIELD…FORT WASHINGTON…FAIRFAX…FORT HUNT…VIENNA… GROVETON…FORESTVILLE…FALLS CHURCH…HUNTINGTON…LARGO… CORAL HILLS…BLADENSBURG…MANTUA…FORT BELVOIR AND PIMMIT HILLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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

Update at 5:40 p.m. — Another Severe Thunderstorm Warning has been issued for Arlington.

SEVERE THUNDERSTORM WARNING FROM 5:31PM EDT TUE UNTIL 6:15PM EDT TUE

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR… FAIRFAX COUNTY IN NORTHERN VIRGINIA… THE CITY OF FALLS CHURCH IN NORTHERN VIRGINIA… THE CITY OF ALEXANDRIA IN NORTHERN VIRGINIA… ARLINGTON COUNTY IN NORTHERN VIRGINIA… THE CITY OF FAIRFAX IN NORTHERN VIRGINIA…

* UNTIL 615 PM EDT

* AT 531 PM EDT… A SEVERE THUNDERSTORM WAS LOCATED OVER SOUTH RIDING… MOVING SOUTHEAST AT 25 MPH.

HAZARD… 70 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL.

SOURCE… RADAR INDICATED.

IMPACT… DAMAGING WINDS WILL CAUSE SOME TREES AND LARGE BRANCHES TO FALL. THIS COULD INJURE THOSE OUTDOORS… AS WELL AS DAMAGE HOMES AND VEHICLES. ROADWAYS MAY BECOME BLOCKED BY DOWNED TREES. LOCALIZED POWER OUTAGES ARE POSSIBLE. UNSECURED LIGHT OBJECTS MAY BECOME PROJECTILES.

* LOCATIONS IMPACTED INCLUDE… ARLINGTON… ALEXANDRIA… CENTREVILLE… RESTON… ANNANDALE… SPRINGFIELD… FAIRFAX… FORT HUNT… VIENNA… GROVETON… FALLS CHURCH… HUNTINGTON… MANTUA… FORT BELVOIR… PIMMIT HILLS… CRYSTAL CITY… REAGAN NATIONAL AIRPORT… MCLEAN… ROSSLYN AND BURKE. GET INDOORS TO PROTECT YOURSELF FROM WIND AND LIGHTNING. TREES AROUND YOU MAY BE DOWNED FROM DAMAGING WINDS… SO IF YOU ARE NEAR LARGE TREES… MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. DON’T DRIVE UNDERNEATH TREES OR IN WOODED AREAS UNTIL THE THREAT HAS PASSED.

Update at 2:25 p.m. — Arlington is now under a Severe Thunderstorm Warning through 3:15 p.m.

Earlier: Arlington is now under a Severe Thunderstorm Watch.

The watch is in effect until 9 p.m. tonight for much of the Mid-Atlantic region.

The National Weather Service says that isolated severe thunderstorms may produce “damaging winds and large hail” this afternoon and evening.

A severe thunderstorm watch has been issued for parts of DE, DC, MD, NJ, PA, VA, WV until 9 PM EDT pic.twitter.com/61tSA37lsp

— NWS Severe Tstorm (@NWSSevereTstorm) June 21, 2016

Arlington and the rest of the D.C. area is under a Severe Thunderstorm Watch.

A line of storms is expected to reach the area around 5 p.m. The watch is in effect until 10 p.m.

From the National Weather Service:

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE ENTIRE OUTLOOK AREA UNTIL 10PM. THE MAIN THREAT IS DAMAGING WIND. LARGE HAIL AND ISOLATED TORNADOES ARE POSSIBLE.

TORRENTIAL DOWNPOURS MAY LEAD TO LOCALIZED FLASH FLOODING OF STREAMS…CREEKS AND URBAN AREAS.