A southwest flow caused hot and humid conditions over the area. A pressure trough triggered showers and thunderstorms, and some became severe due to the unstable atmosphere.

Hail in ALLEGANY, MARYLAND
From 15-AUG-16 13:55:00 to 15-AUG-16 13:55:00 (EST-5)
Location: PINEY GROVE
Magnitude: 1.00 
Reported by: Public

Quarter sized hail was reported.

Hail in MONTGOMERY, MARYLAND
From 15-AUG-16 17:00:00 to 15-AUG-16 17:00:00 (EST-5)
Location: EDNOR
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter sized hail was reported.

Thunderstorm Wind in FREDERICK, MARYLAND
From 15-AUG-16 15:48:00 to 15-AUG-16 15:48:00 (EST-5)
Location: BRUNSWICK
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down in the 600 Block of Petersville Road.

Thunderstorm Wind in FREDERICK, MARYLAND
From 15-AUG-16 15:55:00 to 15-AUG-16 15:55:00 (EST-5)
Location: KNOXVILLE
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down in the 3500 Block of South Mountain Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 15-AUG-16 16:22:00 to 15-AUG-16 16:22:00 (EST-5)
Location: HUNTING HILL
Magnitude: 50.00 EG
Reported by: Trained Spotter

Two tree limbs about 2 to 3 inches in diameter were knocked down.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 15-AUG-16 16:50:00 to 15-AUG-16 16:50:00 (EST-5)
Location: OLNEY
Magnitude: 50.00 EG
Reported by: Broadcast Media

A tree was down on Darnell Drive.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 15-AUG-16 16:51:00 to 15-AUG-16 16:51:00 (EST-5)
Location: BROOKEVILLE
Magnitude: 52.00 EG
Reported by: Emergency Manager

Multiple trees were down in the Olney and Sandy Spring areas.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 15-AUG-16 16:54:00 to 15-AUG-16 16:54:00 (EST-5)
Location: MT ZION
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down near the intersection of Olney Laytonsville Road and Brookeville Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 15-AUG-16 16:55:00 to 15-AUG-16 16:55:00 (EST-5)
Location: SANDY SPG
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down in the 17600 Block of Norwood Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 15-AUG-16 17:09:00 to 15-AUG-16 17:09:00 (EST-5)
Location: BURTONSVILLE
Magnitude: 52.00 EG
Reported by: Emergency Manager

Multiple trees were down on wires in the Burtonsville area.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 15-AUG-16 17:13:00 to 15-AUG-16 17:13:00 (EST-5)
Location: LAUREL
Magnitude: 52.00 EG
Reported by: 911 Call Center

Multiple trees were down on wires.

Thunderstorm Wind in HOWARD, MARYLAND
From 15-AUG-16 17:20:00 to 15-AUG-16 17:20:00 (EST-5)
Location: SIMPSONVILLE
Magnitude: 52.00 EG
Reported by: 911 Call Center

Multiple trees were down on the south side of Columbia.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 15-AUG-16 17:23:00 to 15-AUG-16 17:23:00 (EST-5)
Location: BELTSVILLE ARPT
Magnitude: 50.00 EG
Reported by: Other Federal Agency

Large tree limb down and blocking southbound side of soil Conservation Road between Powder Mill Road and Beaver Dam Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 15-AUG-16 17:25:00 to 15-AUG-16 17:25:00 (EST-5)
Location: RIVERDALE
Magnitude: 52.00 EG
Reported by: 911 Call Center

Multiple trees were down.

Thunderstorm Wind in HOWARD, MARYLAND
From 15-AUG-16 17:36:00 to 15-AUG-16 17:36:00 (EST-5)
Location: DORSEY
Magnitude: 50.00 EG
Reported by: 911 Call Center

Trees were down on wires along Amberton Drive.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 15-AUG-16 19:22:00 to 15-AUG-16 19:22:00 (EST-5)
Location: ACCOKEEK
Magnitude: 52.00 EG
Reported by: Public

Several large trees two to two and one-half feet in diameter were knocked over or uprooted near Pine Lane, Livingston Road and Route 210.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 15-AUG-16 19:30:00 to 15-AUG-16 19:30:00 (EST-5)
Location: PISCATAWAY
Magnitude: 52.00 EG
Reported by: Fire Department/Rescue

Several trees were down along Livingston Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 15-AUG-16 16:35:00 to 15-AUG-16 16:35:00 (EST-5)
Location: REDLAND
Magnitude: 50.00 MG
Reported by: Mesonet

A wind gust of 58 mph was reported.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 15-AUG-16 17:34:00 to 15-AUG-16 17:34:00 (EST-5)
Location: BRIDEWELL
Magnitude: 50.00 MG
Reported by: Mesonet

A wind gust of 58 mph was reported.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 15-AUG-16 18:05:00 to 15-AUG-16 18:05:00 (EST-5)
Location: REVELL
Magnitude: 50.00 MG
Reported by: Mesonet

A wind gust of 58 mph was reported.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 15-AUG-16 17:00:00 to 15-AUG-16 17:00:00 (EST-5)
Location: EDNOR
Magnitude: 52.00 EG
Reported by: Trained Spotter

Multiple trees down on Avenleigh Drive and Cliftonbrook Lane.