An upper level ridge that was in place began to break down during the afternoon hours of July 21st as a cold front moved through the Midwest and an upper-level trough dug into the northern Plains. This allowed additional moisture into the area and when
combined with a weakening capping inversion from height falls it was enough for scattered showers and thunderstorms to develop. With substantial instability, some of these thunderstorms became strong to locally severe.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 21-JUL-19 18:37:00 to 21-JUL-19 18:37:00 (EST-5)
Location: WOODHAVEN
Magnitude: 61.00 EG
Reported by: Trained Spotter

A 10-inch diameter tree branch was blown down at the intersection of Democracy Boulevard and Fernwood Road. Another tree was blown down in the 10200 block of Old Georgetown Road. Multiple trees were blown down along Woodhaven Boulevard near Bradley Boulevard. A tree was also blown onto a house in the 6400 block of Greentree Road. A large tree fell onto a house in the 8700 block of Ewing Drive.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 21-JUL-19 18:48:00 to 21-JUL-19 18:48:00 (EST-5)
Location: PARKSIDE
Magnitude: 50.00 EG
Reported by: Public

A tree was blown down across the railroad tracks near Garrett Park. A tree was blown down across Beach Drive. A tree was also blown down on wires near Connecticut Avenue and Adams Drive.

Thunderstorm Wind in FREDERICK, MARYLAND
From 21-JUL-19 18:44:00 to 21-JUL-19 18:44:00 (EST-5)
Location: WALKERSVILLE
Magnitude: 61.00 EG
Reported by: State Official

Numerous trees were blown down in Walkersville.

Thunderstorm Wind in FREDERICK, MARYLAND
From 21-JUL-19 19:00:00 to 21-JUL-19 19:00:00 (EST-5)
Location: LIBERTYTOWN
Magnitude: 61.00 EG
Reported by: State Official

Numerous trees were blown down in Libertytown.

Thunderstorm Wind in CARROLL, MARYLAND
From 21-JUL-19 19:12:00 to 21-JUL-19 19:12:00 (EST-5)
Location: DENNINGS
Magnitude: 50.00 EG
Reported by: Trained Spotter

Large tree limbs were blown down on Marston Road. Additional trees and wires were blown down in area.

Thunderstorm Wind in CARROLL, MARYLAND
From 21-JUL-19 19:36:00 to 21-JUL-19 19:36:00 (EST-5)
Location: SYKESVILLE
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down on power lines near the intersection of Main Street and Spout Hill Road.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 21-JUL-19 19:39:00 to 21-JUL-19 19:39:00 (EST-5)
Location: OWINGS MILLS
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down along Owings Mills Boulevard at South Dolfield Road.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 21-JUL-19 19:39:00 to 21-JUL-19 19:39:00 (EST-5)
Location: BEREAN
Magnitude: 50.00 EG
Reported by: State Official

Trees were blown down in the 2000 block of Abell Lane.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 21-JUL-19 19:49:00 to 21-JUL-19 19:49:00 (EST-5)
Location: RIDERWOOD
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down on West Seminary Avenue at Mays Chapel Road.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 21-JUL-19 19:49:00 to 21-JUL-19 19:49:00 (EST-5)
Location: WHITE HALL
Magnitude: 50.00 EG
Reported by: State Official

Trees were blown down in the 1500 block of Whitehall Road, in the 19000 block of Graystone Road, and along Stablers Church Road at York Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 21-JUL-19 20:36:00 to 21-JUL-19 20:36:00 (EST-5)
Location: DARLINGTON
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down in the 1100 block of Main Street in Darlington.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 21-JUL-19 18:32:00 to 21-JUL-19 18:32:00 (EST-5)
Location: CARDEROCK SPGS
Magnitude: 50.00 EG
Reported by: Broadcast Media

A large tree was blown down across River Road near Congressional Parkway.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 21-JUL-19 18:34:00 to 21-JUL-19 18:34:00 (EST-5)
Location: CABIN JOHN
Magnitude: 61.00 EG
Reported by: Emergency Manager

Multiple trees were blown down in Glen Echo.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 21-JUL-19 18:48:00 to 21-JUL-19 18:48:00 (EST-5)
Location: POTOMAC
Magnitude: 61.00 EG
Reported by: Emergency Manager

Multiple trees were blown down in the Potomac area.

Thunderstorm Wind in FREDERICK, MARYLAND
From 21-JUL-19 18:35:00 to 21-JUL-19 18:35:00 (EST-5)
Location: FREDERICK
Magnitude: 61.00 EG
Reported by: State Official

Multiple reports of trees and wires down were received in the City of Frederick.