A cold front approaching from the west provided enough lift for showers and thunderstorms.  As this front was approaching the atmosphere was sufficiently unstable across western Massachusetts, southwestern New Hampshire and western Connecticut for storms to become severe.  Most damage was the result of strong to damaging winds.

Thunderstorm Wind in FRANKLIN, MASSACHUSETTS
From 05-AUG-12 13:45:00 to 05-AUG-12 13:45:00 (EST-5)
Location: GREENFIELD
Magnitude: 45.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree on Silver Street was uprooted.

Thunderstorm Wind in HAMPSHIRE, MASSACHUSETTS
From 05-AUG-12 14:05:00 to 05-AUG-12 14:05:00 (EST-5)
Location: HADLEY
Magnitude: 40.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree on Bay Road in Hadley was downed onto a house.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 05-AUG-12 15:10:00 to 05-AUG-12 15:10:00 (EST-5)
Location: GRAFTON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees on Route 122 were downed by thunderstorm winds.

Thunderstorm Wind in HAMPDEN, MASSACHUSETTS
From 05-AUG-12 15:52:00 to 05-AUG-12 15:52:00 (EST-5)
Location: WEST SPRINGFIELD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Two large limbs were downed on West School and Norman Streets.

Thunderstorm Wind in HAMPDEN, MASSACHUSETTS
From 05-AUG-12 15:56:00 to 05-AUG-12 15:56:00 (EST-5)
Location: AGAWAM
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees on Rowley and Suffield Streets and Barn Road were downed by thunderstorm winds.  Wires were also downed at the intersection of Barn Road and Rowley Street.

Thunderstorm Wind in HAMPDEN, MASSACHUSETTS
From 05-AUG-12 16:00:00 to 05-AUG-12 16:00:00 (EST-5)
Location: LONGMEADOW
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Large limbs on Western and Claremont Streets were downed by thunderstorm winds.  A tree on Weoodlawn and South Park Roads also was downed.

Flood in HAMPDEN, MASSACHUSETTS
From 05-AUG-12 16:00:00 to 05-AUG-12 17:00:00 (EST-5)
Location: WEST SPRINGFIELD
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In West Springfield, West School Street was flooded and impassable.  The River Street underpass also was flooded with a car stuck in the floodwaters.  Meadow Street in Agawam was flooded and impassable.

Thunderstorm Wind in HAMPDEN, MASSACHUSETTS
From 05-AUG-12 16:42:00 to 05-AUG-12 16:42:00 (EST-5)
Location: BRIMFIELD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A tree on Battery Avenue was downed by thunderstorm winds.

Lightning in HAMPDEN, MASSACHUSETTS
From 05-AUG-12 16:15:00 to 05-AUG-12 16:15:00 (EST-5)
Location: AGAWAM
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck a tree in the backyard of a house then jumped to the house resulting in a roof fire.

Thunderstorm Wind in FRANKLIN, MASSACHUSETTS
From 05-AUG-12 13:47:00 to 05-AUG-12 14:00:00 (EST-5)
Location: EAST NORTHFIELD
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees on Routes 10 and 142 in Bernardston were downed by thunderstorm winds, closing the roads.  A large tree and wires were downed on Route 142 at Wozniak Road in Northfield.  In Leyden, a tree on East Hill Road was downed on wires.