Passengers at Washington Dulles International Airport were advised to take shelter on the evening of Monday, May 14, after the National Weather Service (NWS) issued a warning of a possible tornado in the area.Mark Frauenfelder captured footage of high winds and rain buffeting vehicles outside the Virginia airport during the storm. NWS DC/Baltimore warned via Twitter damaging winds and hail were possible across Fairfax County. Passengers at Dulles Airport shared accounts on social media of evacuating to Washington Metro station below the airport during the storm. Credit: Mark Frauenfelder via Storyful