Arlington County and much of the surrounding D.C. area is under a Wind Advisory.
The advisory, which is in effect until 6 a.m., cautions that an approaching line of gusty showers may produce damaging winds.
From the National Weather Service:
… WIND ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT TUESDAY… * TIMING… TONIGHT INTO EARLY TUESDAY MORNING. THE GREATEST CONCERN WILL BE FOCUSED MORE IN THE EVENING NEAR I-81, AND NEAR OR AFTER MIDNIGHT ALONG I-95. * WINDS… SOUTH 15 TO 30 MPH, WITH GUSTS UP TO 50 MPH. * IMPACTS… SCATTERED TREE AND POWER LINE DAMAGE. DIFFICULTY DRIVING HIGH PROFILE VEHICLES. PRECAUTIONARY/PREPAREDNESS ACTIONS… A WIND ADVISORY MEANS THAT WINDS OF 45 TO 55 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT, ESPECIALLY FOR HIGH PROFILE VEHICLES. &&
Wind Advisory issued until 6AM. Strong gusts on ridges most of the night; spreading SW to NE at lower elevations mid evening-overnight. pic.twitter.com/xgL1oRzCHH
— NWS DC/Baltimore (@NWS_BaltWash) October 23, 2017