Cutoff low pressure was over the Ohio Valley. Another area of low pressure strengthened overhead on the occluded boundary. Warm and moist air from the south lead to an unstable atmosphere. Strong shear profiles were in place due to the cutoff low to the west. Strong lift associated with the developing low combined with strong shear and enough instability to produce severe thunderstorms.

Hail in MONTGOMERY, MARYLAND
From 06-APR-17 13:03:00 to 06-APR-17 13:03:00 (EST-5)
Location: CLOPPER
Magnitude: 1.00 
Reported by: Emergency Manager

Quarter sized hail was reported.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 06-APR-17 12:47:00 to 06-APR-17 12:47:00 (EST-5)
Location: GEORGETOWN JCT
Magnitude: 52.00 EG
Reported by: Trained Spotter

A tree was down on a light pole along Colesville Road near Georgia Avenue.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 06-APR-17 13:02:00 to 06-APR-17 13:02:00 (EST-5)
Location: COLLINGTON
Magnitude: 52.00 EG
Reported by: Trained Spotter

Five large trees were down in the neighborhood off of Moylan Drive.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 06-APR-17 13:03:00 to 06-APR-17 13:03:00 (EST-5)
Location: COLLINGTON
Magnitude: 52.00 EG
Reported by: Emergency Manager

Trees were down on power lines as well as houses and cars in the area of Milan Way.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 06-APR-17 13:30:00 to 06-APR-17 13:30:00 (EST-5)
Location: BARE HILLS
Magnitude: 52.00 EG
Reported by: Broadcast Media

A roof was blown off an apartment building.

Thunderstorm Wind in HARFORD, MARYLAND
From 06-APR-17 13:44:00 to 06-APR-17 13:44:00 (EST-5)
Location: VAN BIBBER
Magnitude: 52.00 EG
Reported by: 911 Call Center

Trees were down along Route 24 between 7 and Edgewood Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 06-APR-17 13:51:00 to 06-APR-17 13:51:00 (EST-5)
Location: ABERDEEN
Magnitude: 52.00 EG
Reported by: 911 Call Center

A tree fell onto a house along Hillman Court.

Thunderstorm Wind in HARFORD, MARYLAND
From 06-APR-17 13:52:00 to 06-APR-17 13:52:00 (EST-5)
Location: HAVRE DE GRACE
Magnitude: 50.00 EG
Reported by: 911 Call Center

Tree limbs were down in the 2000 Block of Level Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 06-APR-17 14:05:00 to 06-APR-17 14:05:00 (EST-5)
Location: SHORT LANE
Magnitude: 52.00 EG
Reported by: Other Federal Agency

Numerous trees and branches were down near Phillips Airfield.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 06-APR-17 12:46:00 to 06-APR-17 12:46:00 (EST-5)
Location: FORESTVILLE
Magnitude: 57.00 MG
Reported by: AWOS

A wind gust of 66 mph was reported.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 06-APR-17 12:50:00 to 06-APR-17 12:50:00 (EST-5)
Location: RIVERDALE
Magnitude: 59.00 MG
Reported by: Mesonet

A wind gust of 68 mph was reported.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 06-APR-17 13:05:00 to 06-APR-17 13:05:00 (EST-5)
Location: MITCHELLVILLE
Magnitude: 51.00 MG
Reported by: Mesonet

Wind gusts of 59 mph were reported near Bowie.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 06-APR-17 13:32:00 to 06-APR-17 13:32:00 (EST-5)
Location: (BWI)BALTMOR-WSHNGTN
Magnitude: 50.00 MG
Reported by: ASOS

A wind gust of 58 mph was reported at the Baltimore Washington International Airport.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 06-APR-17 13:40:00 to 06-APR-17 13:40:00 (EST-5)
Location: WHITE MARSH
Magnitude: 57.00 MG
Reported by: Trained Spotter

A wind gust of 66 mph reported near White Marsh.

Thunderstorm Wind in HARFORD, MARYLAND
From 06-APR-17 13:51:00 to 06-APR-17 13:51:00 (EST-5)
Location: WEIDE AAF ARPT
Magnitude: 56.00 MG
Reported by: Other Federal Agency

A wind gust of 64 mph was reported along the Aberdeen Proving Ground.

Thunderstorm Wind in HARFORD, MARYLAND
From 06-APR-17 14:06:00 to 06-APR-17 14:06:00 (EST-5)
Location: PHILLIPS AAF ARPT
Magnitude: 51.00 MG
Reported by: AWOS

A wind gust of 59 mph was reported near Perryman.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 06-APR-17 13:00:00 to 06-APR-17 13:00:00 (EST-5)
Location: COLLINGTON
Magnitude: 52.00 EG
Reported by: Trained Spotter

Trees were down near Bowie.

Thunderstorm Wind in HARFORD, MARYLAND
From 06-APR-17 14:00:00 to 06-APR-17 14:00:00 (EST-5)
Location: ABERDEEN PROVING GRN
Magnitude: 60.00 MG
Reported by: Other Federal Agency

A wind gust of 69 mph was reported at the Aberdeen Proving Ground.