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 TOLLAND, CONNECTICUT
From 10-AUG-12 16:07:00 to 10-AUG-12 16:07:00 (EST-5)
Location: ROCKVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several large limbs on Union Street were downed by thunderstorm winds.

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

Trees and wires on Washington Street were downed by thunderstorm winds.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 10-AUG-12 15:55:00 to 10-AUG-12 15:55:00 (EST-5)
Location: MANCHESTER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and wires on Interstate 84, East Center and Pickens Streets were downed by thunderstorm winds.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 10-AUG-12 15:28:00 to 10-AUG-12 15:28:00 (EST-5)
Location: EAST GLASTONBURG
Magnitude: 87.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The National Weather Service in Taunton, MA conducted a storm survey of wind damage in eastern Glastonbury, determining that a microburst had occurred.  The damage area extended from Homestead Drive, Paddock Lane and Wassuc Road to just north of Hebron Avenue.  The Homestead Drive/Paddock Lane and Needletree Lane/Butler Drive areas experienced the most concentrated tree damage.  In these two areas, numerous trees were either uprooted or snapped off near the tree base.  In the Butler Drive/Needletree Lane area, upwards of 30 to 40 trees were uprooted with three houses sustaining damage from falling trees.  Wind speeds were estimated between 85 and 100 mph in this area.  In the area of Homestead Drive/Paddock Lane, wind speeds were estimated between 75 and 90 mph.  Outside of these two core areas, wind speeds were estimated between 55 and 80 mph.
There was also considerabel tree damage around a home on the south side of Weir Street near Roaring Brook.
The tree damage tapered off near Hebron Avenue with only minor tree damage as far north as Mountain Road.  While the greatest width of the damage field was about one half mile, most of the damage was one quarter mile in width.  The core of the strongest winds was 100-200 yards wide.

Thunderstorm Wind in TOLLAND, CONNECTICUT
From 10-AUG-12 15:55:00 to 10-AUG-12 15:55:00 (EST-5)
Location: COVENTRY
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree on Dunn Road was downed by thunderstorm winds, closing the road.

Thunderstorm Wind in TOLLAND, CONNECTICUT
From 10-AUG-12 16:06:00 to 10-AUG-12 16:06:00 (EST-5)
Location: VERNON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Large branches on Vernon Circle and a tree on Route 30 were downed by thunderstorm winds.

Flood in TOLLAND, CONNECTICUT
From 10-AUG-12 16:10:00 to 10-AUG-12 17:10:00 (EST-5)
Location: STAFFORD SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Route 190 was closed due to flooding.

Thunderstorm Wind in TOLLAND, CONNECTICUT
From 10-AUG-12 16:18:00 to 10-AUG-12 16:18:00 (EST-5)
Location: VERNON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and wires on Chamberlain and Union Streets were downed by thunderstorm winds.

Thunderstorm Wind in TOLLAND, CONNECTICUT
From 10-AUG-12 16:25:00 to 10-AUG-12 16:25:00 (EST-5)
Location: ELLINGTON
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tree limbs along 140 near the baseball fields were downed by thunderstorms.

Thunderstorm Wind in HARTFORD, CONNECTICUT
From 10-AUG-12 16:44:00 to 10-AUG-12 16:44:00 (EST-5)
Location: EAST GLASTONBURG
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and wires on Routes 2 and 83 were downed by thunderstorm winds.