 Breaking news on WTOP. The National Weather Service has just issued a severe thunderstorm warning for southern Loudoun County, north-central Fauquier County, and northwestern Prince William County until 845. Radar is showing a severe thunderstorm near Middleburg, 11 miles west of Brambleton, moving east at 15 miles per hour. The hazards here are 60-mile-per-hour wind gusts. Damaging winds will cause some trees and large branches to fall. This could injure those outdoors as well as damage homes.