A strong cold front slowly traced through the area during the morning hours of the 5th.   A southerly flow ahead of the front caused copious amounts of moisture to move into the region from the Atlantic Ocean and Gulf of Mexico. The deep moisture combined with a mid-level trough that was associated with the cold front to produce moderate amounts of instability. Lift from the cold front along with moderate instability triggered showers and thunderstorms across the area.
Thunderstorms were able to mix down strong winds from aloft causing damaging wind gusts. Wind speeds that changed rapidly in speed and direction with height caused the stronger storms to produce isolated tornadoes.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 05-APR-11 03:29:00 to 05-APR-11 03:29:00 (EST-5)
Location: GEORGETOWN JCT
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree fell onto an automobile along Jones Mill Road.

Thunderstorm Wind in CHARLES, MARYLAND
From 05-APR-11 03:39:00 to 05-APR-11 03:39:00 (EST-5)
Location: MC CONCHIE
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down along Poor House Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 05-APR-11 03:42:00 to 05-APR-11 03:42:00 (EST-5)
Location: RADIANT VLY
Magnitude: 56.00 EG
Property damage: 10.00K
Reported by: Fire Department/Rescue

A tree fell onto a house in Landover.

Thunderstorm Wind in CHARLES, MARYLAND
From 05-APR-11 03:44:00 to 05-APR-11 03:44:00 (EST-5)
Location: SPRINGHILL
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A telephone pole and wires were down along Old Stage Coach Road about one third of a mile from Crain Highway.

Thunderstorm Wind in CALVERT, MARYLAND
From 05-APR-11 04:01:00 to 05-APR-11 04:01:00 (EST-5)
Location: DUNKIRK
Magnitude: 61.00 EG
Property damage: 1.00K
Reported by: Public

Trees were down along Baker Street.

Thunderstorm Wind in CALVERT, MARYLAND
From 05-APR-11 04:01:00 to 05-APR-11 04:01:00 (EST-5)
Location: DUNKIRK
Magnitude: 61.00 EG
Property damage: 2.00K
Reported by: Public

Shingles were lifted from a roof near Dunkirk. Branches were also down across this area.

Thunderstorm Wind in CALVERT, MARYLAND
From 05-APR-11 04:03:00 to 05-APR-11 04:03:00 (EST-5)
Location: SUNDERLAND
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

A tree was down along Skinners Turn Road.

Thunderstorm Wind in CALVERT, MARYLAND
From 05-APR-11 04:05:00 to 05-APR-11 04:05:00 (EST-5)
Location: COX
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down along Lowery Road and Hidden Retreat Trail.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 05-APR-11 04:10:00 to 05-APR-11 04:10:00 (EST-5)
Location: FAIR HAVEN
Magnitude: 57.00 MG
Reported by: Mesonet

A wind gust of 66 mph was reported at Herring Bay.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 05-APR-11 04:10:00 to 05-APR-11 04:10:00 (EST-5)
Location: FAIR HAVEN
Magnitude: 56.00 EG
Property damage: 0.50K
Reported by: Public

Tree limbs were down near North Beach.

Thunderstorm Wind in CALVERT, MARYLAND
From 05-APR-11 04:20:00 to 05-APR-11 04:20:00 (EST-5)
Location: SOLLERS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down along Mill Bridge Road and Sollers Wharf Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 05-APR-11 04:24:00 to 05-APR-11 04:24:00 (EST-5)
Location: VALLEY LEE
Magnitude: 52.00 EG
Property damage: 5.00K
Reported by: Emergency Manager

A tree fell onto a mobile home along Bank Creek Road.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 05-APR-11 04:08:00 to 05-APR-11 04:08:00 (EST-5)
Location: PERRY HALL
Magnitude: 56.00 EG
Reported by: Trained Spotter

A wind gust of 65 mph was estimated by a trained spotter.

Thunderstorm Wind in CALVERT, MARYLAND
From 05-APR-11 04:07:00 to 05-APR-11 04:07:00 (EST-5)
Location: OWINGS
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A barn was destroyed due to thunderstorm wind.

Tornado in ANNE ARUNDEL, MARYLAND
From 05-APR-11 03:56:00 to 05-APR-11 03:57:00 (EST-5)
Location: CONAWAYS
Tornado F-scale: EF0
Property damage: 2.00K
Reported by: NWS Storm Survey

Several pine trees were topped fifteen feet up just south of the Patuxent Preserve.

Tornado in PRINCE GEORGE'S, MARYLAND
From 05-APR-11 03:55:00 to 05-APR-11 03:56:00 (EST-5)
Location: COLLINGTON
Tornado F-scale: EF0
Property damage: 2.00K
Reported by: NWS Storm Survey

Several pine trees were blown over in the Sherwood Manor area. The tornado continued into Anne Arundel County.

Tornado in CHARLES, MARYLAND
From 05-APR-11 03:48:00 to 05-APR-11 03:49:00 (EST-5)
Location: MATTAWOMAN
Tornado F-scale: EF0
Property damage: 5.00K
Reported by: NWS Storm Survey

A brief tornado struck the community of Marbella in northern Waldorf. A large pine tree was blown over into a house roof and several community trees were snapped. There was damage to a fence and there were many windblown outdoor objects.