A cold front combined with moderate instability to trigger showers and thunderstorms on the twelfth. Stronger winds aloft due to an upper-level low over New England caused thunderstorms to become well organized. Thunderstorms were able to produce damaging wind gusts along wit large hail.

Thunderstorm Wind in CALVERT, MARYLAND
From 12-JUN-11 14:30:00 to 12-JUN-11 14:30:00 (EST-5)
Location: APPEAL
Magnitude: 50.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was blocking the intersection of HG Trueman Road and Southern Connector Boulevard in Lusby.

Thunderstorm Wind in HARFORD, MARYLAND
From 12-JUN-11 15:27:00 to 12-JUN-11 15:27:00 (EST-5)
Location: SCARBORO
Magnitude: 52.00 EG
Property damage: 3.00K
Reported by: Fire Department/Rescue

Trees were down near Sandy Hook Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 12-JUN-11 15:27:00 to 12-JUN-11 15:27:00 (EST-5)
Location: GIBSON MANOR
Magnitude: 52.00 EG
Property damage: 3.00K
Reported by: Fire Department/Rescue

Trees were down near Sandy Hook Road and Walters Mill Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 12-JUN-11 15:27:00 to 12-JUN-11 15:27:00 (EST-5)
Location: FOREST HILL
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Fire Department/Rescue

Vehicles were blocked between two downed trees near the 2900 Block of Grier Nursery Road.

Thunderstorm Wind in CHARLES, MARYLAND
From 12-JUN-11 16:40:00 to 12-JUN-11 16:40:00 (EST-5)
Location: INDIAN HEAD
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Trained Spotter

A trellis was destroyed and a tree was down near Indian Head.

Thunderstorm Wind in CHARLES, MARYLAND
From 12-JUN-11 16:40:00 to 12-JUN-11 16:40:00 (EST-5)
Location: INDIAN HEAD
Magnitude: 56.00 EG
Property damage: 5.00K
Reported by: Public

Multiple trees were down around Indian Head.

Thunderstorm Wind in CHARLES, MARYLAND
From 12-JUN-11 16:44:00 to 12-JUN-11 16:44:00 (EST-5)
Location: RISON
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down near Serenity Lane and Sweetman Road.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 12-JUN-11 13:53:00 to 12-JUN-11 13:53:00 (EST-5)
Location: BURTNER
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Fire Department/Rescue

A large tree was down along power lines at Mill Point Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 12-JUN-11 15:27:00 to 12-JUN-11 15:27:00 (EST-5)
Location: GIBSON MANOR
Magnitude: 52.00 EG
Property damage: 5.00K
Reported by: Newspaper

MD-RT 43 was closed near Gibson Road due to downed trees.

Thunderstorm Wind in HARFORD, MARYLAND
From 12-JUN-11 15:22:00 to 12-JUN-11 15:22:00 (EST-5)
Location: ROCKS
Magnitude: 52.00 EG
Reported by: Unknown

Trees were down near Rocks.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 12-JUN-11 16:03:00 to 12-JUN-11 16:03:00 (EST-5)
Location: WOODBERRY
Magnitude: 52.00 EG
Property damage: 5.00K
Reported by: Fire Department/Rescue

Multiple trees were down in northern parts of Baltimore.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 12-JUN-11 16:12:00 to 12-JUN-11 16:12:00 (EST-5)
Location: CANTON
Magnitude: 52.00 EG
Property damage: 5.00K
Reported by: Fire Department/Rescue

Trees were down in the eastern parts of Baltimore.

Thunderstorm Wind in CHARLES, MARYLAND
From 12-JUN-11 16:38:00 to 12-JUN-11 16:38:00 (EST-5)
Location: INDIAN HEAD
Magnitude: 56.00 EG
Property damage: 15.00K
Reported by: Public

Multiple large trees were down near Indian Head. Trees also fell onto power lines knocking out power across the area and closing roads.

Hail in HARFORD, MARYLAND
From 12-JUN-11 15:18:00 to 12-JUN-11 15:18:00 (EST-5)
Location: STREET
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter sized hail was reported near Pylesville.

Tornado in HARFORD, MARYLAND
From 12-JUN-11 15:07:00 to 12-JUN-11 15:10:00 (EST-5)
Location: STREET
Tornado F-scale: EF0
Property damage: 10.00K
Reported by: NWS Storm Survey

Trees were uprooted and snapped along its path from Street Road to Miller Road.

Tornado in HARFORD, MARYLAND
From 12-JUN-11 15:50:00 to 12-JUN-11 15:51:00 (EST-5)
Location: BELCAMP
Tornado F-scale: EF0
Property damage: 20.00K
Reported by: NWS Storm Survey

Significant tree damage surrounded a historic property near Riverside Parkway and Pulaski Parkway. Nearly three dozen trees were either blown down or topped on this property. Tree debris carried from the property littered the adjoining railroad tracks that parallel Pulaski Highway. An eyewitness observed large tree limbs blowing horizontally across Pulaski Highway.