Severe Thunderstorm Warning Issued for Howard, Montgomery, and Frederick Counties in Maryland

Alert Details

The National Weather Service in Sterling, Virginia, has issued a Severe Thunderstorm Warning for Howard County, central Montgomery County, and southeastern Frederick County in Maryland. The alert was issued at 6:56 PM EDT following radar indications of severe weather moving through the area.

Affected Areas

The warning impacts several counties in central and north-central Maryland, including:

• Howard County
• Central Montgomery County
• Southeastern Frederick County

Specific locations in the path of the storm include Columbia, Germantown, Rockville, Gaithersburg, Olney, Damascus, Ellicott City, Aspen Hill, Montgomery Village, Eldersburg, Redland, Boyds, Green Valley, Scaggsville, Cloverly, Clarksburg, Burtonsville, Darnestown, Derwood, and Fulton.

What You Should Do

For your protection, move to an interior room on the lowest floor of a building. Residents should also be aware that a Tornado Watch remains in effect until 8:00 PM EDT for northern, central, and north-central Maryland.

Expected Conditions

At 6:56 PM EDT, severe thunderstorms were located along a line extending from near Green Valley to near Montgomery Village to near Boyds, moving east at 60 mph.

• Wind: 60 mph wind gusts are expected. Damaging winds may cause trees and large branches to fall, potentially injuring those outdoors and damaging homes or vehicles. Roadways may become blocked, and localized power outages are possible.
• Hail: Radar indicates the potential for hail up to .75 inches.
• Projectiles: Unsecured light objects may become projectiles due to high wind speeds.

Timeline

The Severe Thunderstorm Warning is effective immediately and is set to expire at 7:30 PM EDT on March 11, 2026.