Hot and humid conditions overspread the area on August 22nd ahead of an approaching cold front and upper level trough. This warmth and humidity allowed for the
development of significant amounts of instability by the afternoon hours. Convection during the afternoon and evening hours was initially focused along a remnant mesoscale convective system across central Virginia. However, additional areas of development occurred as upper level energy from Kentucky and West Virginia moved eastward and into the region and the cold front moved southeastward from Pennsylvania. Some of the thunderstorms became severe.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 22-AUG-19 17:12:00 to 22-AUG-19 17:12:00 (EST-5)
Location: CAVETOWN
Magnitude: 61.00 EG
Reported by: State Official

Numerous trees were blown down in the Smithsburg area.

Thunderstorm Wind in FREDERICK, MARYLAND
From 22-AUG-19 17:15:00 to 22-AUG-19 17:15:00 (EST-5)
Location: FOXVILLE
Magnitude: 61.00 EG
Reported by: State Official

Multiple trees were blown down along MD-77 Foxville Road near Tower Road.

Thunderstorm Wind in FREDERICK, MARYLAND
From 22-AUG-19 17:20:00 to 22-AUG-19 17:20:00 (EST-5)
Location: FOXVILLE
Magnitude: 61.00 EG
Reported by: State Official

Multiple trees were blown down on Catoctin Mountain Road near William Houck Drive.

Thunderstorm Wind in FREDERICK, MARYLAND
From 22-AUG-19 17:29:00 to 22-AUG-19 17:29:00 (EST-5)
Location: JIMTOWN
Magnitude: 70.00 EG
Reported by: State Official

Numerous large trees, wires, and poles were blown down near the intersection of Hessong Bridge Road and Blue Mountain Road.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 22-AUG-19 17:04:00 to 22-AUG-19 17:04:00 (EST-5)
Location: CHEWSVILLE
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down on Little Antietam Road near Serenity Drive.

Hail in FREDERICK, MARYLAND
From 22-AUG-19 17:29:00 to 22-AUG-19 17:29:00 (EST-5)
Location: THURMONT
Magnitude: 1.75 
Reported by: Trained Spotter

Golf ball-sized hail (1.75 in diameter) was reported near Thurmont Elementary School.

Thunderstorm Wind in FREDERICK, MARYLAND
From 22-AUG-19 17:45:00 to 22-AUG-19 17:45:00 (EST-5)
Location: WOODSBORO
Magnitude: 70.00 EG
Reported by: State Official

Numerous trees were blown down on Copper Oaks Drive. Another tree fell onto a car on Second Street.

Thunderstorm Wind in FREDERICK, MARYLAND
From 22-AUG-19 17:50:00 to 22-AUG-19 17:50:00 (EST-5)
Location: JOHNSVILLE
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down blocking MD-75 Green Valley Road near Handboard Road.

Thunderstorm Wind in CARROLL, MARYLAND
From 22-AUG-19 17:52:00 to 22-AUG-19 17:52:00 (EST-5)
Location: UNION BRIDGE
Magnitude: 61.00 EG
Reported by: Public

An open-faced pole barn was blown down.

Thunderstorm Wind in CARROLL, MARYLAND
From 22-AUG-19 18:29:00 to 22-AUG-19 18:29:00 (EST-5)
Location: SAMS CREEK
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down along Sams Creek Road.

Thunderstorm Wind in CARROLL, MARYLAND
From 22-AUG-19 18:11:00 to 22-AUG-19 18:11:00 (EST-5)
Location: GUNPOWDER
Magnitude: 50.00 EG
Reported by: State Official

Trees were blown down on Alesia Lineboro Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 22-AUG-19 19:30:00 to 22-AUG-19 19:30:00 (EST-5)
Location: CLOPPER
Magnitude: 50.00 EG
Reported by: State Official

Multiple trees and wires were blown down in the Germantown, Gaithersburg, Montgomery Village area.

Thunderstorm Wind in HARFORD, MARYLAND
From 22-AUG-19 19:25:00 to 22-AUG-19 19:25:00 (EST-5)
Location: CLAYTON
Magnitude: 50.00 EG
Reported by: Emergency Manager

A tree was blown down blocking part of Harford Square Drive near Hanson Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 22-AUG-19 19:35:00 to 22-AUG-19 19:35:00 (EST-5)
Location: LAYTONSVILLE
Magnitude: 61.00 EG
Reported by: State Official

Several reports of trees being blown down were received in the Laytonsville and Sandy Springs area.

Thunderstorm Wind in HARFORD, MARYLAND
From 22-AUG-19 19:35:00 to 22-AUG-19 19:35:00 (EST-5)
Location: SEWELL
Magnitude: 61.00 EG
Reported by: Emergency Manager

Several large trees were blown down in the Abingdon area.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 22-AUG-19 20:25:00 to 22-AUG-19 20:25:00 (EST-5)
Location: EARLEIGH HGTS
Magnitude: 50.00 EG
Reported by: Trained Spotter

A tree was blown down at the intersection of MD-648 and Magothy Bridge Road.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 22-AUG-19 20:25:00 to 22-AUG-19 20:25:00 (EST-5)
Location: SOLLEY
Magnitude: 61.00 EG
Reported by: Fire Department/Rescue

Trees, wires, and poles were blown down near the intersection of Marley Neck Boulevard and Creekside Village Boulevard.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 22-AUG-19 17:09:00 to 22-AUG-19 17:09:00 (EST-5)
Location: CAVETOWN
Magnitude: 51.00 MG
Reported by: Mesonet

A 51-knot (59 mph) wind gust was measured at Smithsburg Middle School.