A mesoscale convective system (MCS) and its associated energy was moving across central West Virginia on the morning of August 20th. As this moved eastward into the region during the afternoon and evening hours, it served as the focus for additional shower and thunderstorm development. Significant amounts of instability and steepening low level lapse rates led some of these thunderstorms to become severe.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 20-AUG-19 15:45:00 to 20-AUG-19 15:45:00 (EST-5)
Location: (ADW)ANDREWS AFB CAM
Magnitude: 50.00 MG
Reported by: AWOS

A 50-knot (58 mph) wind gust was measured at Andrews Air Force Base.

Hail in PRINCE GEORGE'S, MARYLAND
From 20-AUG-19 16:06:00 to 20-AUG-19 16:06:00 (EST-5)
Location: (ADW)ANDREWS AFB CAM
Magnitude: 1.25 
Reported by: Trained Spotter

Up to half-dollar sized hail (1.25 in diameter) reported near Andrews Air Force Base.

Hail in MONTGOMERY, MARYLAND
From 20-AUG-19 16:50:00 to 20-AUG-19 16:50:00 (EST-5)
Location: QUINCE ORCHARD
Magnitude: 0.88 
Reported by: State Official

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 20-AUG-19 15:41:00 to 20-AUG-19 15:41:00 (EST-5)
Location: SOMERSET
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down onto a house in the 4800 block of Western Avenue.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 20-AUG-19 15:38:00 to 20-AUG-19 15:38:00 (EST-5)
Location: BETHESDA
Magnitude: 50.00 EG
Reported by: State Official

A large tree was blown down onto utility wires near the intersection of Onondaga Road and Massachusetts Avenue.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 20-AUG-19 17:00:00 to 20-AUG-19 17:00:00 (EST-5)
Location: MORGANZA
Magnitude: 61.00 EG
Reported by: State Official

A tree was knocked down onto a garage in the 26200 block of Forest Hall Drive. A tree was blown down across the road near the intersection of Morganza Turner Road and Johnson Manor Farm Lane. Another tree was blown down blocking the road in the 25600 block of Colton Point Road. A tree was also blown down blocking the road near Colton Point Road and Doctor Johnson Road. A tree was blown down onto power lines across the road in the 28900 block of Point Lookout Road. Several trees were also blown down on Reintzell Lane. Another tree was blown down partially blocking Laurel Grove Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 20-AUG-19 17:14:00 to 20-AUG-19 17:14:00 (EST-5)
Location: LOVEVILLE
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down blocking Friendship School Road in the 25600 block.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 20-AUG-19 17:12:00 to 20-AUG-19 17:12:00 (EST-5)
Location: LOVEVILLE
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down across the road in the 27100 block of Point Lookout Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 20-AUG-19 17:11:00 to 20-AUG-19 17:11:00 (EST-5)
Location: BROOKEVILLE
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down onto wires and utility poles near the intersection of Georgia Avenue and Gregg Road.

Thunderstorm Wind in FREDERICK, MARYLAND
From 20-AUG-19 18:12:00 to 20-AUG-19 18:12:00 (EST-5)
Location: BRADDOCK HGTS
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down onto wires along Kemp Lane. A tree was also blown down near the intersection of Rocky Springs Road and Old Receiver Road. Another tree was blown down along Ellsworth Way.

Thunderstorm Wind in FREDERICK, MARYLAND
From 20-AUG-19 18:27:00 to 20-AUG-19 18:27:00 (EST-5)
Location: NEW MIDWAY
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down in New Midway. Another tree was blown down along Legore Bridge Road.