The National Weather Service has issued a Flash Flood Watch for Arlington and the surrounding D.C. region.
Forecasters say 2-3 inches of rain is expected to fall from Thursday afternoon into Friday. Heavy rain showers and thunderstorms may cause flash flooding, especially along small local rivers and streams.
From the NWS:
… FLASH FLOOD WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY AFTERNOON…
THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A
* FLASH FLOOD WATCH FOR PORTIONS OF MARYLAND… THE DISTRICT OF COLUMBIA AND VIRGINIA… INCLUDING THE FOLLOWING AREAS… IN MARYLAND… ANNE ARUNDEL… CARROLL… CHARLES… FREDERICK MD… HARFORD… HOWARD… MONTGOMERY… NORTHERN BALTIMORE… PRINCE GEORGES AND SOUTHERN BALTIMORE. THE DISTRICT OF COLUMBIA. IN VIRGINIA… ALBEMARLE… ARLINGTON/FALLS CHURCH/ALEXANDRIA… CULPEPER… FAIRFAX… GREENE… LOUDOUN… MADISON… NELSON… NORTHERN FAUQUIER… ORANGE… PRINCE WILLIAM/MANASSAS/MANASSAS PARK… RAPPAHANNOCK… SOUTHERN FAUQUIER… SPOTSYLVANIA AND STAFFORD.
* FROM LATE THURSDAY NIGHT THROUGH FRIDAY AFTERNOON
* SHOWERS AND THUNDERSTORMS… WITH PERIODS OF HEAVY RAIN… ARE EXPECTED TO DEVELOP THURSDAY AFTERNOON AND CONTINUE THROUGH FRIDAY MORNING. 2 TO 3 INCHES OF RAINFALL IS EXPECTED… WITH LOCALLY HIGHER AMOUNTS. FLASH FLOODING IS POSSIBLE… ESPECIALLY ALONG SMALL RIVERS AND STREAMS.
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.