A series of upper level disturbances rotated around a vertically stacked low pressure system in the Great Lakes.  These provided a focus for showers and thunderstorms to develop across southern New England.  Southerly winds drew tropical moisture over the area, resulting in very heavy rain in showers and thunderstorms that developed.  In addition, strong winds in the upper levels and 30-40 knots of deep layer shear resulted in wind damage with the strongest of these storms.

Thunderstorm Wind in NORFOLK, MASSACHUSETTS
From 10-AUG-12 17:30:00 to 10-AUG-12 17:30:00 (EST-5)
Location: WELLESLEY
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree and wires were downed by thunderstorm winds.

Thunderstorm Wind in PLYMOUTH, MASSACHUSETTS
From 10-AUG-12 17:37:00 to 10-AUG-12 17:37:00 (EST-5)
Location: STANLEY
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A transmission line on Mill Street was downed resulting in widespread power outages.

Thunderstorm Wind in PLYMOUTH, MASSACHUSETTS
From 10-AUG-12 17:35:00 to 10-AUG-12 17:35:00 (EST-5)
Location: WHITMAN
Magnitude: 40.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Amateur Radio

A large limb in front of town hall was downed by thunderstorm winds.

Flood in ESSEX, MASSACHUSETTS
From 10-AUG-12 18:04:00 to 10-AUG-12 19:04:00 (EST-5)
Location: LYNN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Commercial Street underpass was flooded and impassable.  The Nahant Circle was flooded with one foot of water.

Thunderstorm Wind in HAMPSHIRE, MASSACHUSETTS
From 10-AUG-12 12:30:00 to 10-AUG-12 12:30:00 (EST-5)
Location: HADLEY
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Amateur Radio

A large limb on Mockingbird Lane was downed by thunderstorm winds.

Thunderstorm Wind in HAMPSHIRE, MASSACHUSETTS
From 10-AUG-12 12:08:00 to 10-AUG-12 12:08:00 (EST-5)
Location: SOUTHHAMPTON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several trees on Maple and High Streets and Clark and Russellville Roads were downed by thunderstorm winds.

Flash Flood in BRISTOL, MASSACHUSETTS
From 10-AUG-12 16:31:00 to 10-AUG-12 17:31:00 (EST-5)
Location: SOUTH ATTLEBORO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Route 1A was flooded over the curbs.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 10-AUG-12 16:57:00 to 10-AUG-12 16:57:00 (EST-5)
Location: HOLDEN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several trees were downed by thunderstorm winds.

Thunderstorm Wind in BRISTOL, MASSACHUSETTS
From 10-AUG-12 16:55:00 to 10-AUG-12 16:55:00 (EST-5)
Location: TAUNTON
Magnitude: 70.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An NWS storm survey team determined a microburst occurred in Taunton.  Winds were estimated to be 70 to 80 mph. Six maple trees were uprooted on Tremont Street along Cobbs Creek, landing on four vehicles in the driveway behind a house.  Several large branches were snapped and small sections of siding were torn off the house.  A large spruce tree eight inches in diameter was blown onto a house and many other large tree limbs were snapped off trees.  The house sustained minor damage.  Two more trees fell behind this house.  Numerous tree branches were downed.  Behind another house, a tree fell taking down a portion of the back fence.  On Eldridge Street, a silver maple tree about six inches in diameter was snapped near the base and fell onto a house.  Several large branches were downed in this area as well.  A sheet metal shed was blown into the next yard.

Thunderstorm Wind in BRISTOL, MASSACHUSETTS
From 10-AUG-12 17:21:00 to 10-AUG-12 17:21:00 (EST-5)
Location: TAUNTON
Magnitude: 40.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree at the intersection of Warren and Shore Streets was downed by thunderstorm winds.

Thunderstorm Wind in BRISTOL, MASSACHUSETTS
From 10-AUG-12 17:29:00 to 10-AUG-12 17:29:00 (EST-5)
Location: TAUNTON
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Wires on Fremont Street were downed by thunderstorm winds.

Flash Flood in NORFOLK, MASSACHUSETTS
From 10-AUG-12 17:52:00 to 10-AUG-12 18:52:00 (EST-5)
Location: WEST STOUGHTON
Flood cause: Heavy Rain
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A car was trapped in floodwaters on Independence Avenue in Quincy.  In Weymouth, Fogg Street was flooded with several inches of water at the entrance to the South Shore Emergency Room entrance.  Columbian Street at Nevin Road was flooded with four feet of water.  Bodwell Drive in Avon was flooded with several cars stuck in flood waters.  Several feet of water on Route 37 in Braintree near the Mutual gas station closed the road.  A car was stuck in flood waters at the intersection of Union Street and Grossman Drive.  In Stoughton, three to four inches of water flooded the travel lanes on Route 27.

Flash Flood in BRISTOL, MASSACHUSETTS
From 10-AUG-12 16:47:00 to 10-AUG-12 17:47:00 (EST-5)
Location: RAYNHAM
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Route 138 in Raynham was flooded near the Market Basket.  A car was stuck in flood waters on Tremont Street.  The occupants of the car were trapped and had to be rescued.  Weir Street was impassable due to flooding.  Powderhorn Drive was impassable due to 12 to 15 inches of water over the road.

Lightning in NORFOLK, MASSACHUSETTS
From 10-AUG-12 15:04:00 to 10-AUG-12 15:04:00 (EST-5)
Location: FOXBOROUGH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Lightning struck a house at the intersection of Mechanic and Hope Streets.  It struck a tree which imploded sending pieces of wood onto the deck.  The lightning then traveled through the yard, creating a 25 foot trench leading to a house and destroying the wooden stairs on the deck and blowing gutters off the house.  A 74 year old woman who lives in the house was taken to the hospital with chest pains.

Flash Flood in BRISTOL, MASSACHUSETTS
From 10-AUG-12 16:12:00 to 10-AUG-12 17:12:00 (EST-5)
Location: WATUPPA
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Fall River, numerous streets were flooded including Plymouth Avenue with 4 feet of water, Davol Street, and Presidents Avenue with 1-2 feet of water.  A car was stuck in the flood waters on Davol Street.  St. Anne's Hospital had to divert emergency traffic due to flooding in the emergency room several inches deep.  Eighteen patients in the ER were moved to a higher floor.  The emergency room reopened at 7:30am after it was cleaned up.

Flood in PLYMOUTH, MASSACHUSETTS
From 10-AUG-12 18:02:00 to 10-AUG-12 19:02:00 (EST-5)
Location: MONTELLO
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several streets were flooded and impassable including North Main Street near Lansdown Street and Warren Avenue.  Tremont Street was flooded with more than a foot of water.  A car drove into two feet of water on Ettrick Street and became stuck.  Two people had to be rescued from the car.  Westgate Drive was flooded with three feet of water, with several cars stuck in the flood waters.

Flash Flood in BRISTOL, MASSACHUSETTS
From 10-AUG-12 16:19:00 to 10-AUG-12 17:19:00 (EST-5)
Location: BUFFINTON CORNER
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

County Street in Somerset was closed due to two feet of water over the road from the overflowing of Buffington Brook.  Florida Avenue and Gibbs Street were flooded.  In Swansea, the intersection of Macomber and Puffer Avenues flooded.  Route 6 in front of the Oriental Pearl Restaurant and the parking lot at Swansea Crossing shopping plaza flooded.  Manhole covers on Route 118 were lifted by flood waters.