Update at 2:30 p.m. — The National Weather Service just issued a Severe Thunderstorm Watch for Arlington and the region.
A severe thunderstorm watch has been issued for parts of CT, DE, DC, MD, NJ, NY, PA, RI, VA until 10 PM EDT pic.twitter.com/yiekPcpAsc
— NWS Severe Tstorm (@NWSSevereTstorm) July 22, 2019
Update at 11:15 p.m. — A Flash Flood Watch has been issued for Arlington and is set to take effect Monday afternoon.
Forecasters say multiple rounds of storms are expected later in the day Monday, producing heavy rainfall that could produce flooding.
More from the National Weather Service:
…FLASH FLOOD WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE MONDAY NIGHT…
* MULTIPLE ROUNDS OF SHOWERS AND THUNDERSTORMS CAPABLE OF PRODUCING HEAVY RAINFALL ARE LIKELY. AREAL AVERAGE RAINFALL OF 1 TO 1.5 INCHES IS EXPECTED, WITH ISOLATED TOTALS OF 4 INCHES POSSIBLE. MUCH OF THIS RAIN MAY FALL IN SHORT PERIODS OF TIME IN ANY ONE GIVEN LOCATION, RESULTING IN THE RISK FOR FLASH FLOODING MONDAY AFTERNOON INTO MONDAY NIGHT.
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.
While the heat lessens slightly Monday, the threat for heavy thunderstorms will increase. A Flash Flood Watch will be in effect from Monday afternoon through late Monday night. pic.twitter.com/YhY9COkdHy
— NWS DC/Baltimore (@NWS_BaltWash) July 21, 2019
Earlier: For the second night in a row, northern portions of Arlington County are under a Severe Thunderstorm Warning Sunday.
More from the National Weather Service:
Severe Thunderstorm Warning including Washington DC, Arlington VA, Silver Spring MD until 8:15 PM EDT pic.twitter.com/Y1XBqPMAq1
— NWS DC/Baltimore (@NWS_BaltWash) July 21, 2019
THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR… THE NORTHWESTERN DISTRICT OF COLUMBIA… SOUTHEASTERN MONTGOMERY COUNTY IN CENTRAL MARYLAND… ARLINGTON COUNTY IN NORTHERN VIRGINIA… THE CITY OF FALLS CHURCH IN NORTHERN VIRGINIA… NORTHEASTERN FAIRFAX COUNTY IN NORTHERN VIRGINIA… * UNTIL 815 PM EDT. * AT 731 PM EDT, SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR NORTH POTOMAC TO PIMMIT HILLS, MOVING EAST AT 10 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, ROCKVILLE, BETHESDA, ANNANDALE, OLNEY, FALLS CHURCH, PIMMIT HILLS, MCLEAN, HOWARD UNIVERSITY, GALLAUDET UNIVERSITY, AMERICAN LEGION BRIDGE, FORT TOTTEN, ROSSLYN, ASPEN HILL, POTOMAC, NORTH BETHESDA, LINCOLNIA, TYSONS CORNER, TAKOMA PARK AND COLESVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS… FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. && HAIL…<.75IN WIND…60MPH
Thunderstorms are ramping up tonight. A quick tip: if a traffic signal is dark, that is a power loss and requires the power company. If it’s flashing, that is a reset and that is us. You can report flashing signals at https://t.co/12wxgee8pi or 800-FOR-ROAD. Stay safe, Friends!
— VDOT Northern VA (@VaDOTNOVA) July 21, 2019