Maryland, Virginia Severe Severe Thunderstorm Warning | Effective 07/18/2026 12:12

Headline: 
Severe Thunderstorm Warning issued July 18 at 3:12PM EDT until July 18 at 4:00PM EDT by NWS Baltimore MD/Washington DC
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
July 18, 2026 - 12:12pm
Expires: 
July 18, 2026 - 1:00pm
Description: 
At 312 PM EDT, severe thunderstorms were located along a line extending from near Wolfsville to near Braddock Heights to near Poolesville, moving northeast at 30 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...Radar indicated. 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. Locations impacted include... Columbia, Germantown, Frederick, Gaithersburg, Leesburg, Hagerstown, Olney, Damascus, Thurmont, Poolesville, Emmitsburg, Harry Grove Stadium, Montgomery Village, Eldersburg, Ballenger Creek, Redland, Mount Airy, Robinwood, Taneytown, and Walkersville.
Instruction: 
A Tornado Watch remains in effect until 900 PM EDT for central and north central Maryland. Prepare immediately for large hail and damaging winds. People outside should move to a shelter, inside a strong building and away from windows. Continuous cloud to ground lightning is occurring with these storms. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
Area Description: 
Carroll, MD; Frederick, MD; Howard, MD; Montgomery, MD; Washington, MD; Loudoun, VA
Forcast Office: 
NWS Baltimore MD/Washington DC