A cold front slid across Southern New England, led by a shortwave trough.  High moisture content to the airmass allowed for heavy downpours, while breaks of sunshine generated sufficient instability for damaging thunderstorms.

Flood in NORFOLK, MASSACHUSETTS
From 12-JUL-17 15:33:00 to 12-JUL-17 18:30:00 (EST-5)
Location: WEST QUINCY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 333 PM EST, multiple cars were trapped in flood waters on Water Street in Quincy.

Flood in HAMPDEN, MASSACHUSETTS
From 12-JUL-17 16:29:00 to 12-JUL-17 19:30:00 (EST-5)
Location: BRIGHTWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 355 PM EST, manhole covers on Main Street in Springfield were popping due to flooding.  The area was near a McDonalds.

Flood in HAMPDEN, MASSACHUSETTS
From 12-JUL-17 16:00:00 to 12-JUL-17 20:00:00 (EST-5)
Location: FEEDING HILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

At 5 PM EST, Mill Street in Agawam had a two foot depth of water between Henry Street and Poplar Street.

Flood in WORCESTER, MASSACHUSETTS
From 12-JUL-17 16:30:00 to 12-JUL-17 19:00:00 (EST-5)
Location: DUDLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 430 PM EST, multiple streets in Dudley were flooded and impassable.

Flood in WORCESTER, MASSACHUSETTS
From 12-JUL-17 17:38:00 to 12-JUL-17 20:30:00 (EST-5)
Location: EAST VLG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 538 PM EST, Worcester Road in Webster near All-Star Paintball was flooded and impassable.

Flood in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 17:53:00 to 12-JUL-17 20:00:00 (EST-5)
Location: CLEMATIS BROOK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 553 PM EST, flooding was reported on Acton Street in the Bemis section of Watertown with manhole covers being lifted.

Flood in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 18:04:00 to 12-JUL-17 21:00:00 (EST-5)
Location: SILVER HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 604 PM EST, Second Avenue in Waltham was impassable due to flooding. Flooding was also reported on Sutton Avenue.

Hail in BRISTOL, MASSACHUSETTS
From 12-JUL-17 15:05:00 to 12-JUL-17 15:05:00 (EST-5)
Location: DIGHTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 305 PM EST, dime size hail was reported in Dighton.

Hail in BRISTOL, MASSACHUSETTS
From 12-JUL-17 15:15:00 to 12-JUL-17 15:15:00 (EST-5)
Location: MYRICKS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 315 PM EST, dime size hail was reported at Freetown.

Lightning in PLYMOUTH, MASSACHUSETTS
From 12-JUL-17 10:30:00 to 12-JUL-17 11:00:00 (EST-5)
Location: COLE CORNER
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1130 AM EST, a lightning strike caused a shed fire on Free Street in Hingham.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 12-JUL-17 11:47:00 to 12-JUL-17 11:47:00 (EST-5)
Location: GRAFTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1147 AM EST, a tree was brought down on Merriam Road in Grafton.

Thunderstorm Wind in HAMPDEN, MASSACHUSETTS
From 12-JUL-17 12:18:00 to 12-JUL-17 12:20:00 (EST-5)
Location: WESTFIELD
Magnitude: 50.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1218 PM EST, trees were brought down on Arnold Street in Westfield.  At 1220 PM EST, power lines were brought down on Washington Street.

Thunderstorm Wind in HAMPDEN, MASSACHUSETTS
From 12-JUL-17 12:40:00 to 12-JUL-17 12:40:00 (EST-5)
Location: FEEDING HILLS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1240 PM EST, a tree was brought down on North Westfield Street in Agawam.

Thunderstorm Wind in BRISTOL, MASSACHUSETTS
From 12-JUL-17 13:07:00 to 12-JUL-17 13:07:00 (EST-5)
Location: MANSFIELD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 107 PM EST, a tree was brought down on wires on West Street in Mansfield.

Thunderstorm Wind in BRISTOL, MASSACHUSETTS
From 12-JUL-17 15:04:00 to 12-JUL-17 15:04:00 (EST-5)
Location: NORTH DIGHTON
Magnitude: 50.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Amateur Radio

At 304 PM EST, a tree was brought down on wires on Prospect Street in Dighton.

Thunderstorm Wind in BRISTOL, MASSACHUSETTS
From 12-JUL-17 15:08:00 to 12-JUL-17 15:09:00 (EST-5)
Location: ASSONET
Magnitude: 50.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 308 PM EST, trees were brought down on wires on Water Street and Jeffrey Lane in Freetown.  Multiple trees were brought down on Main Street.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 12-JUL-17 11:50:00 to 12-JUL-17 11:50:00 (EST-5)
Location: WEST UPTON
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1150 AM EST, multiple trees and wires were down on Fowler Street in Upton.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 12-JUL-17 16:30:00 to 12-JUL-17 16:30:00 (EST-5)
Location: WEST DUDLEY
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 430 PM EST, two large trees were down on Lempicki Road in Dudley.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 17:47:00 to 12-JUL-17 18:05:00 (EST-5)
Location: NEWTONVILLE
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 647 PM EST, trees were reported down on Lake Avenue in Newton.  A tree was also reported down on wires on Lowell Avenue, and a tree was down on a car at Anthony Circle. Trees and wires were down on Fordham Road.  A tree was blocking the road near 73 Blake Street.

Thunderstorm Wind in SUFFOLK, MASSACHUSETTS
From 12-JUL-17 18:05:00 to 12-JUL-17 18:05:00 (EST-5)
Location: BRIGHTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 605 PM EST, a tree was reported down on Beacon Street in Boston.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 18:06:00 to 12-JUL-17 18:06:00 (EST-5)
Location: CLEMATIS BROOK
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 606 PM EST, the intersection of Lexington Street and Warren Street was blocked by downed trees.

Flood in NORFOLK, MASSACHUSETTS
From 12-JUL-17 12:55:00 to 12-JUL-17 16:00:00 (EST-5)
Location: WRENTHAM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1255 PM EST, Thurston Street in Wrentham was closed due to street flooding.  At 119 PM EST, one lane of East Street was closed due to street flooding.

Flood in WORCESTER, MASSACHUSETTS
From 12-JUL-17 17:38:00 to 12-JUL-17 21:00:00 (EST-5)
Location: WEST DUDLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 538 PM EST, West Main Street in Dudley was flooded and impassable near the Connecticut State Line.  Also, Southbridge Road near near the Connecticut State Line was also flooded and impassable.  Also, at 626 PM EST Center Road was flooded and impassable.

Flood in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 18:04:00 to 12-JUL-17 21:00:00 (EST-5)
Location: BEAVER BROOK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 604 PM EST, cars were disabled due to flooding in Lexington on Waltham Street at Route 2.  At 645 PM EST, Lowell Street in Lexington was flooded and impassable between Bryant Road and Fairlawn Lane.

Flood in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 18:47:00 to 12-JUL-17 21:45:00 (EST-5)
Location: LAKE STREET
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 647 PM EST, Goreham Street in West Somerville was flooded and impassable.  Simpson Avenue was also flooded and impassable.  At 715 PM EST, a car was reported stuck in flood waters at Holland and Wallace Streets.

Flood in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 18:47:00 to 12-JUL-17 21:45:00 (EST-5)
Location: BOSTON NAVAL SHIPYAR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 647 PM EST, Medford Street in East Somerville was flooded and impassable at the underpass beneath the railroad tracks.  At 709 PM EST, Washington Street was flooded and impassable beneath the Route 28 overpass.

Flood in SUFFOLK, MASSACHUSETTS
From 12-JUL-17 19:17:00 to 12-JUL-17 22:15:00 (EST-5)
Location: CHELSEA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

At 717 PM EST, Carter Street in Chelsea was under a foot and a half of water between Addison Street and Beech Street.  At 724 PM, the Revere Beach Parkway eastbound near Webster Avenue was closed due to flooding.

Hail in WORCESTER, MASSACHUSETTS
From 12-JUL-17 11:57:00 to 12-JUL-17 12:02:00 (EST-5)
Location: MILFORD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At Noon EST, one and one-quarter inch diameter hail fell at Milford.  One-inch diameter hail fell at Milford at 1157 AM.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 12-JUL-17 11:42:00 to 12-JUL-17 11:50:00 (EST-5)
Location: WEST UPTON
Magnitude: 50.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1142 AM EST, a tree was knocked down on Warren Street in Upton.  At 1150 AM EST, multiple trees and wires were brought down on Fowler Street in Upton.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 12-JUL-17 11:50:00 to 12-JUL-17 11:50:00 (EST-5)
Location: SOUTH MILFORD
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1150 AM EST, a tree was down on a car on route 140 in Mendon near Gasco Fuel.

Thunderstorm Wind in BRISTOL, MASSACHUSETTS
From 12-JUL-17 14:50:00 to 12-JUL-17 15:10:00 (EST-5)
Location: REHOBOTH
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

At 250 PM EST, trees were brought down on Route 44 in Rehoboth. Trees were also brought down on Cedar Street, River Street, and Bay State Road between 250 PM and 310 PM EST.  Multiple trees and wires were brought down on Elm Street and County Street.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 17:44:00 to 12-JUL-17 17:44:00 (EST-5)
Location: WATERTOWN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 544 PM EST, a tree was downed in Watertown on Charles River Road at Irving Street. Multiple trees and wires were also downed on Pleasant Street.

Flood in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 17:03:00 to 12-JUL-17 20:00:00 (EST-5)
Location: CHELMSFORD CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

At 503 PM EST, in Chelmsford, Billerica Road near Turnpike Road was impassable due to flooding.

Flood in MIDDLESEX, MASSACHUSETTS
From 12-JUL-17 17:00:00 to 12-JUL-17 22:00:00 (EST-5)
Location: (BED)HANSCOM FLD BED
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 0.00K
Reported by: State Official

At 505 PM EST, heavy rain from a thunderstorm flooded the terminal building at Hanscom Field in Bedford.  Flood waters reached a depth of nearly two feet.