UPDATE: Severe Thunderstorm Warning Issued for McLean, Tysons and Vienna

Update at 2:50 p.m. — The National Weather Service has issued a Severe Thunderstorm Warning for portions of McLean, Vienna and Tysons.

More from NWS:

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… NORTHWESTERN PRINCE GEORGES COUNTY IN CENTRAL MARYLAND… EAST CENTRAL LOUDOUN COUNTY IN NORTHERN VIRGINIA… NORTHEASTERN FAIRFAX COUNTY IN NORTHERN VIRGINIA…

* UNTIL 330 PM EDT.

* AT 244 PM EDT, A SEVERE THUNDERSTORM WAS LOCATED OVER RESTON, MOVING EAST AT 25 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… ROCKVILLE, BETHESDA, GAITHERSBURG, RESTON, OLNEY, HERNDON, LANGLEY PARK, VIENNA, LOWES ISLAND, MCLEAN, AMERICAN LEGION BRIDGE, ASPEN HILL, POTOMAC, NORTH BETHESDA, OAKTON, STERLING, NORTH POTOMAC, TYSONS CORNER, HYATTSVILLE AND WHITE OAK.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING.

Earlier: Fairfax County and surrounding areas could see some thunderstorms, flash flooding, rain and strong wind today (Monday).

The National Weather Service recently issued a Severe Thunderstorm Watch that will go into effect at 10 p.m. — possibly overlapping with the Flash Flood Watch, which begins at 3 p.m. and lasts until “late tonight.”

The county can expect heavy rain around 1-2 inches that could cause flash flooding later this afternoon and tonight. Strong thunderstorms may hit northwestern Fairfax County, with gusts up to 50 miles per hour.

The National Weather Service also issued a Special Weather Statement:

…SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING…

A cold front approaching the region will interact with an unstable airmass to result in showers and thunderstorms. Some of these thunderstorms may become severe, especially between 2 PM this afternoon and 9 PM this evening.

The main threats with these storms will be:
* Damaging wind gusts
* Heavy rainfall and flash flooding
* Frequent lightning

Take time today to review your severe weather action plan. Have a way to receive alerts from the National Weather Service, and be ready to seek safe shelter should storms approach your neighborhood or a warning is issued.

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