The Tysons area is under a Severe Thunderstorm Warning, which includes the D.C. area.
The warning will last until 5:45 p.m. People can expect winds up to 60 miles per hour with “quarter size hail.”
More from the National Weather Service:
At 4:57 PM EDT, severe thunderstorms were located along a line extending from near Great Falls to Fairfax to near Bull Run, moving east at 25 mph…
IMPACT…Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles.
Severe Thunderstorm Warning including Washington DC, Arlington VA, Alexandria VA until 5:45 PM EDT pic.twitter.com/tLVjgUjhhY
— NWS DC/Baltimore (@NWS_BaltWash) September 11, 2019