Strong low pressure over the Midwest remained cutoff from jet stream on the 16th. The warm front associated with this system passed through during the morning. Warm and moist southerly winds behind the front provided moderate amounts of instability. The instability combined with forcing from the low for showers and thunderstorms to develop.
There was enough instability along with strong winds aloft for some thunderstorms to become severe.

Thunderstorm Wind in PRINCE WILLIAM, VIRGINIA
From 16-APR-11 17:00:00 to 16-APR-11 17:00:00 (EST-5)
Location: MINNIEVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down on Larchmont Court and Brawner Drive.

Thunderstorm Wind in PRINCE WILLIAM, VIRGINIA
From 16-APR-11 17:10:00 to 16-APR-11 17:10:00 (EST-5)
Location: WOODBRIDGE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down at the intersection of Millwood Drive and Horner Road.

Thunderstorm Wind in CLARKE, VIRGINIA
From 16-APR-11 17:36:00 to 16-APR-11 17:36:00 (EST-5)
Location: BRIGGS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down on Millwood Pike.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 13:59:00 to 16-APR-11 13:59:00 (EST-5)
Location: GREENWOOD
Magnitude: 52.00 EG
Reported by: Fire Department/Rescue

A tree was down along the road.

Thunderstorm Wind in ROCKINGHAM, VIRGINIA
From 16-APR-11 13:45:00 to 16-APR-11 13:45:00 (EST-5)
Location: GROTTOES
Magnitude: 61.00 EG
Property damage: 5.00K
Reported by: Trained Spotter

Trees were down and a small building was damaged near Grottoes.

Thunderstorm Wind in NELSON, VIRGINIA
From 16-APR-11 13:44:00 to 16-APR-11 13:44:00 (EST-5)
Location: MARTINS STORE
Magnitude: 59.00 MG
Reported by: Mesonet

A wind gust of 68 mph was reported at Wintergreen.

Thunderstorm Wind in CLARKE, VIRGINIA
From 16-APR-11 17:40:00 to 16-APR-11 17:40:00 (EST-5)
Location: MILLWOOD
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down over Route 723 near Route 50.

Thunderstorm Wind in CLARKE, VIRGINIA
From 16-APR-11 17:43:00 to 16-APR-11 17:43:00 (EST-5)
Location: CLAYTONVILLE
Magnitude: 56.00 EG
Property damage: 2.00K
Reported by: Fire Department/Rescue

Power poles and a transformer was down along Calmes Neck Lane.

Thunderstorm Wind in WARREN, VIRGINIA
From 16-APR-11 17:34:00 to 16-APR-11 17:34:00 (EST-5)
Location: FRONT ROYAL WARN ARP
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was blocking Punch Run Road off Strasburg Road.

Thunderstorm Wind in AUGUSTA, VIRGINIA
From 16-APR-11 12:42:00 to 16-APR-11 12:42:00 (EST-5)
Location: CHURCHVILLE
Magnitude: 52.00 EG
Property damage: 3.00K
Reported by: Public

Four to five large trees were down along Moffett Branch Road. Trees were about twenty feet high.

Thunderstorm Wind in ROCKINGHAM, VIRGINIA
From 16-APR-11 13:15:00 to 16-APR-11 13:15:00 (EST-5)
Location: ATHLONE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A few trees were down about five miles north of Massanutten.

Thunderstorm Wind in LOUDOUN, VIRGINIA
From 16-APR-11 18:16:00 to 16-APR-11 18:16:00 (EST-5)
Location: LEESBURG
Magnitude: 56.00 EG
Property damage: 2.00K
Reported by: Trained Spotter

Trees were down near South King Street and Davis Avenue in Leesburg.

Thunderstorm Wind in LOUDOUN, VIRGINIA
From 16-APR-11 18:12:00 to 16-APR-11 18:12:00 (EST-5)
Location: WOODBURN
Magnitude: 56.00 MG
Reported by: Mesonet

A wind gust of 65 mph was measured near Woodburn.

Thunderstorm Wind in WARREN, VIRGINIA
From 16-APR-11 13:46:00 to 16-APR-11 13:46:00 (EST-5)
Location: BENTONVILLE
Magnitude: 61.00 EG
Property damage: 2.00K
Reported by: Fire Department/Rescue

Power poles were down on Whispering Pine Lane.

Tornado in AUGUSTA, VIRGINIA
From 16-APR-11 13:20:00 to 16-APR-11 13:23:00 (EST-5)
Location: WILDA
Tornado F-scale: EF0
Property damage: 2.20M
Reported by: NWS Storm Survey

A tornado tracked just west of Stuarts Draft. The tornado produced damage to thirty-seven structures and also downed numerous trees and powerlines.
Numerous trees were toppled and wires were down along Old White Hll Road. A large tree fell onto a house off White Hall Road. A large storage shed was destroyed and multiple hardwood trees were topped ten to fifteen feet up near Twin Mill and Churchmans Mill Roads. A farm building along Tinkling Spring Road and Yoder Circle lost several outbuildings and trees.
Preliminary damage estimates from Augusty County Emergency Officials listed storm damage to twelve residences, three businesses, fifteen garage sheds, two mobile strutures and five barns. Preliminary damage cost was estimated at over 2.2 million dollars.

Thunderstorm Wind in CLARKE, VIRGINIA
From 16-APR-11 14:14:00 to 16-APR-11 14:14:00 (EST-5)
Location: BRIGGS
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was fell onto power lines along Lord Fairfax Highway.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 14:11:00 to 16-APR-11 14:11:00 (EST-5)
Location: WHITE HALL
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was down at the intersection of Garth Road and Lake Albemarle Road.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 14:43:00 to 16-APR-11 14:43:00 (EST-5)
Location: ADVANCE MILLS
Magnitude: 56.00 EG
Property damage: 2.00K
Reported by: Fire Department/Rescue

Trees and wires were down at Frays Mill and Mill House Drive.

Thunderstorm Wind in MADISON, VIRGINIA
From 16-APR-11 14:45:00 to 16-APR-11 14:45:00 (EST-5)
Location: SHELBY
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: NWS Storm Survey

Two trees were down on a farm along U.S. 29.

Thunderstorm Wind in MADISON, VIRGINIA
From 16-APR-11 14:50:00 to 16-APR-11 14:50:00 (EST-5)
Location: SHELBY
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down along Shelby Road.

Thunderstorm Wind in ORANGE, VIRGINIA
From 16-APR-11 14:54:00 to 16-APR-11 14:54:00 (EST-5)
Location: SCUFFLETOWN
Magnitude: 61.00 EG
Property damage: 1.00K
Reported by: Public

A large Oak Tree was down along Scuffletown Road. The tree was about twenty-eight inches wide.

Thunderstorm Wind in CULPEPER, VIRGINIA
From 16-APR-11 15:11:00 to 16-APR-11 15:11:00 (EST-5)
Location: MONUMENT MILLS
Magnitude: 56.00 EG
Property damage: 3.00K
Reported by: Fire Department/Rescue

Trees were down along the 5000 block of Docs Road.

Thunderstorm Wind in LOUDOUN, VIRGINIA
From 16-APR-11 15:35:00 to 16-APR-11 15:35:00 (EST-5)
Location: HAMILTON
Magnitude: 50.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A couple of trees were down along Colonial Highway in Hamilton.

Thunderstorm Wind in SPOTSYLVANIA, VIRGINIA
From 16-APR-11 15:46:00 to 16-APR-11 15:46:00 (EST-5)
Location: BELMONT
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree fell onto a vehicle at the intersection of Stubbs Ridge Road and Lawyers Road.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 14:17:00 to 16-APR-11 14:17:00 (EST-5)
Location: COVESVILLE
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was blocking U.S. 29.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 14:24:00 to 16-APR-11 14:24:00 (EST-5)
Location: IVY
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree was down on power lines near Ivy.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 14:25:00 to 16-APR-11 14:25:00 (EST-5)
Location: SIMEON
Magnitude: 61.00 EG
Property damage: 5.00K
Reported by: Trained Spotter

Damage was reported to the siding of a roof near Newcomb Hall. A few trees were also cracked in half.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 14:37:00 to 16-APR-11 14:37:00 (EST-5)
Location: RIO
Magnitude: 56.00 EG
Property damage: 5.00K
Reported by: Trained Spotter

A tree fell onto a house along Westminster Road.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 14:39:00 to 16-APR-11 14:39:00 (EST-5)
Location: PROFFIT
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree fell onto Powell Creek in Hollymead.

Tornado in LOUDOUN, VIRGINIA
From 16-APR-11 18:12:00 to 16-APR-11 18:16:00 (EST-5)
Location: WOODBURN
Tornado F-scale: EF0
Property damage: 4.00K
Reported by: NWS Storm Survey

Sporadic snapped tree limbs and a few uprooted trees were located in neighborhoods surrounding the Westpark Golf Course. A road sign was pulled from the ground and snapped along Clubhouse Drive.
Shingles were removed from a home near Canby Road.

Thunderstorm Wind in GREENE, VIRGINIA
From 16-APR-11 14:41:00 to 16-APR-11 14:41:00 (EST-5)
Location: STANDARDSVILLE
Magnitude: 61.00 EG
Property damage: 10.00K
Reported by: Emergency Manager

Thirty trees were blown down at a golf course near the intersection of Madison Road and State Route 619.

Hail in WARREN, VIRGINIA
From 16-APR-11 17:32:00 to 16-APR-11 17:32:00 (EST-5)
Location: FRONT ROYAL
Magnitude: 1.00 
Reported by: Public

Hail up to the size of quarters was reported near Front Royal.

Thunderstorm Wind in FREDERICK, VIRGINIA
From 16-APR-11 13:53:00 to 16-APR-11 13:53:00 (EST-5)
Location: MT PLEASANT
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Fire Department/Rescue

Trees were down onto wires along Perry Road.

Thunderstorm Wind in ALBEMARLE, VIRGINIA
From 16-APR-11 14:33:00 to 16-APR-11 14:33:00 (EST-5)
Location: FARMINGTON
Magnitude: 56.00 EG
Property damage: 1.00K
Reported by: NWS Employee

A tree was down off the ramp of Fontaine Avenue on Route 29.

Thunderstorm Wind in CULPEPER, VIRGINIA
From 16-APR-11 15:12:00 to 16-APR-11 15:12:00 (EST-5)
Location: WHITE SHOP
Magnitude: 50.00 EG
Property damage: 0.50K
Reported by: Trained Spotter

Small braches were knocked down near Winston.

Thunderstorm Wind in LOUDOUN, VIRGINIA
From 16-APR-11 15:35:00 to 16-APR-11 15:35:00 (EST-5)
Location: MIDDLEBURG
Magnitude: 50.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

A tree and power lines were down on Foxcroft Road.