UPDATE: Tornado Watch, Flood Flash Warning Until 3pm

9 am. THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH AND A FLASH FLOOD WATCH UNTIL 3 PM EDT THIS AFTERNOON FOR FAIRFAX COUNTY.

6:31 am April 28 Update: TORNADO WATCH 247 REMAINS VALID UNTIL 8 AM EDT THIS MORNING FOR THE FOLLOWING AREAS THE DISTRICT OF COLUMBIA

IN NORTHERN VIRGINIA ARLINGTON CULPEPER FAIRFAX FAUQUIER LOUDOUN PRINCE WILLIAM STAFFORD.

IN MARYLAND THIS WATCH INCLUDES 11 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL HOWARD MONTGOMERY PRINCE GEORGES IN NORTH CENTRAL MARYLAND CARROLL FREDERICK IN NORTHERN MARYLAND BALTIMORE HARFORD IN SOUTHERN MARYLAND CALVERT CHARLES ST. MARYS .

7:32pm Update: THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A 

* SEVERE THUNDERSTORM WARNING FOR... 
 PRINCE WILLIAM COUNTY IN NORTHERN VIRGINIA... 
 FAIRFAX COUNTY IN NORTHERN VIRGINIA... 

* UNTIL 745 PM EDT 

* AT 657 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
 SEVERE THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF 
 QUARTERS AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
 LOCATED NEAR WOODBRIDGE...AND MOVING NORTHEAST AT 30 MPH. 

6:17pm.  UPDATE. A tornado WARNING now effect for McLean and Northern Virginia, from the National Weather Service.

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * TORNADO WARNING FOR...FAIRFAX COUNTY IN NORTHERN VIRGINIA... STAFFORD COUNTY IN NORTHERN VIRGINIA... PRINCE WILLIAM COUNTY IN NORTHERN VIRGINIA...  CHARLES COUNTY IN SOUTHERN MARYLAND... * UNTIL 645 PM EDT

Earlier Story: A TORNADO WATCH IS IN EFFECT UNTIL 8 PM FOR THE OUTLOOK AREA. 
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON. 
ANY STORMS THIS AFTERNOON WILL HAVE THE POTENTIAL TO PRODUCE 
DAMAGING WIND GUSTS...LARGE HAIL AND A FEW TORNADOES. 

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR ALL OF THE 
OUTLOOK AREA PRIMARILY LATE TONIGHT. A COLD FRONT WILL CROSS THE 
AREA LATE TONIGHT. ANY THUNDERSTORMS ALONG AND AHEAD OF THE COLD 
FRONT WILL BE CAPABLE OF PRODUCING DAMAGING WINDS AND LARGE HAIL. 

A SMALL CRAFT ADVISORY IS IN EFFECT THROUGH TONIGHT FOR THE 
MARYLAND CHESAPEAKE BAY AND THE TIDAL POTOMAC RIVER. 

TIDAL DEPARTURES WILL INCREASE TODAY AS SOUTHERLY FLOW STRENGTHENS 
TODAY. WATER LEVELS MAY APPROACH THRESHOLDS FOR MINOR COASTAL 
FLOODING LATE TONIGHT FOR LOW-LYING AREAS ALONG THE TIDAL POTOMAC 
RIVER AND THE WESTERN SHORE OF THE MARYLAND CHESAPEAKE BAY.