A cold front passed through the area. At the same time, an upper-level trough passed through increasing the winds aloft. There was enough shear to combine with an unstable atmosphere for severe thunderstorms to develop.

Thunderstorm Wind in FAUQUIER, VIRGINIA
From 14-JUL-17 14:37:00 to 14-JUL-17 14:37:00 (EST-5)
Location: DELAPLANE
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 3400 Block of Grove Lane, the 3000 Block of Rokeby Road and the 2700 Block of Rokeby Road.

Thunderstorm Wind in SHENANDOAH, VIRGINIA
From 14-JUL-17 14:37:00 to 14-JUL-17 14:37:00 (EST-5)
Location: BOWMAN
Magnitude: 50.00 EG
Reported by: Public

Several trees were down and damage had taken place to roofing shingles.

Thunderstorm Wind in FAUQUIER, VIRGINIA
From 14-JUL-17 14:45:00 to 14-JUL-17 14:45:00 (EST-5)
Location: RECTORTOWN
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down in the 7600 Block of Frogtown Road.

Thunderstorm Wind in ROCKINGHAM, VIRGINIA
From 14-JUL-17 15:05:00 to 14-JUL-17 15:05:00 (EST-5)
Location: GROTTOES
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down on power lines near the intersection of Ore Bank Road and Browns Gap Road.

Thunderstorm Wind in ROCKINGHAM, VIRGINIA
From 14-JUL-17 15:02:00 to 14-JUL-17 15:02:00 (EST-5)
Location: GROTTOES
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree fell onto power lines along sevenths street.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:11:00 to 14-JUL-17 15:11:00 (EST-5)
Location: VALE
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down at the intersection of Fox Mill Road and Lake Edge Way.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:14:00 to 14-JUL-17 15:14:00 (EST-5)
Location: GREAT FALLS
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down at Georgetown Pike and Ellsworth Avenue.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:16:00 to 14-JUL-17 15:16:00 (EST-5)
Location: OAKTON
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down at Five Oaks Road and Blake Lane.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:16:00 to 14-JUL-17 15:16:00 (EST-5)
Location: VIENNA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Multiple trees were down along  Browns Mill Road and Towlston road.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:16:00 to 14-JUL-17 15:16:00 (EST-5)
Location: KENMORE
Magnitude: 50.00 EG
Reported by: 911 Call Center

Trees were down on Beulah Road and Trotting Horse Lane.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:18:00 to 14-JUL-17 15:18:00 (EST-5)
Location: MERRIFIELD
Magnitude: 50.00 EG
Reported by: Emergency Manager

A tree was down at the Pan AM Shopping Center.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:19:00 to 14-JUL-17 15:19:00 (EST-5)
Location: MERRIFIELD
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down at the intersection off Maple Lane and Lee Highway.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:20:00 to 14-JUL-17 15:20:00 (EST-5)
Location: ILDA
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down at Guinea Road and Braeburn Drive.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:20:00 to 14-JUL-17 15:20:00 (EST-5)
Location: DUNN LORING
Magnitude: 50.00 EG
Reported by: Broadcast Media

A tree fell onto a Metro Car.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 15:24:00 to 14-JUL-17 15:24:00 (EST-5)
Location: CHESTERBROOK WOODS
Magnitude: 50.00 EG
Reported by: 911 Call Center

Trees were down along Bridal Patch Lane, Gallant Green Drive, and Jones Branch Drive.

Thunderstorm Wind in ARLINGTON, VIRGINIA
From 14-JUL-17 15:28:00 to 14-JUL-17 15:28:00 (EST-5)
Location: BARCROFT
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 6900 Block of Williamsburg Boulevard.

Thunderstorm Wind in ARLINGTON, VIRGINIA
From 14-JUL-17 15:36:00 to 14-JUL-17 15:36:00 (EST-5)
Location: ROSSLYN
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree fell onto a car along 8th Street and North Monroe Street.

Thunderstorm Wind in ALEXANDRIA (C), VIRGINIA
From 14-JUL-17 15:37:00 to 14-JUL-17 15:37:00 (EST-5)
Location: ALEXANDRIA
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree fell onto a house along Saylor Place.

Thunderstorm Wind in FAIRFAX, VIRGINIA
From 14-JUL-17 16:05:00 to 14-JUL-17 16:05:00 (EST-5)
Location: LAUREL GROVE
Magnitude: 50.00 EG
Reported by: NWS Employee

A tree was down in the Alexandria area.

Thunderstorm Wind in FREDERICK, VIRGINIA
From 14-JUL-17 16:33:00 to 14-JUL-17 16:33:00 (EST-5)
Location: DBL TOLLGATE
Magnitude: 51.00 MG
Reported by: Public

A wind gust of 59 mph was measured. Two trees were also down as well.