(Updated 3:49 p.m.)

The National Weather Service has upgraded a Severe Thunderstorm Watch to a Warning for Western Fairfax County and other nearby areas.

The warning is in effect until 4:30 p.m.  The NWS says the storm is capable of producing winds in excess of 60 mph.

Original story:

Reston, along with the rest of the Washington, D.C. metro area, is under a Severe Thunderstorm Watch through 8:00 p.m. Monday.

Forecasters say storms with damaging winds are possible this afternoon and evening. The peak storm time in Northern Virginia may be between 3 and 6 p.m.

From the National Weather Service:

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM…FOR THE INTERSTATE 95 CORRIDOR OF NORTHERN MARYLAND AND NORTH CENTRAL VIRGINIA…AND LOWER SOUTHERN MARYLAND. NUMEROUS THUNDERSTORMS… SOME SEVERE…WILL DEVELOP THIS AFTERNOON AND EVENING. DAMAGING WIND GUSTS AND AN ISOLATED TORNADO WILL BE THE PRIMARY THREATS. IN ADDITION…ANY THUNDERSTORM WILL PRODUCE VERY HEAVY RAINFALL AND MAY RESULT IN LOCALIZED FLASH FLOODING.