The National Weather Service has issued A SEVERE THUNDERSTORM WATCH for the following counties or areas: Montgomery, MD; Fauquier, VA; Jefferson, WV; Clarke, VA; Prince George's; Charles, MD; Culpeper, VA; St. Mary's, MD; Fairfax (city); Warren; Manassas; Manassas Park, VA; District of Columbia, DC; Frederick, MD; Prince William; Madison; Rappahannock; Stafford; Arlington; Falls Church; Spotsylvania; King George; Orange, VA; Calvert, MD; Fairfax (county); Alexandria; Fredericksburg; Loudoun, VA; Tidal Potomac from Indian Head to Cobb Island; Tidal Potomac from Key Bridge to Indian Head,MD, Northwest Atlantic; at 2:45 PM on JUL 21, 2026 Effective until 10:15 PM. Message from ERN/CRTV.