An upper level low developed in the eastern Great Lakes, providing enough lift and energy for showers and thunderstorms to develop across southern New England.  With plenty of moisture, shear and instability in the region, some of these storms became severe, producing strong to damaging winds and flash flooding.  This began with a round of showers and thunderstorms in the morning, which mainly resulted in flash flooding.  This was followed with more shower and thunderstorm activity during the afternoon with damaging winds the main effect.
One of the severe thunderstorms in the morning interacted with the marine front along the coast, allowing it to spin up into a rather brief tornado.  Despite the short path and duration of the tornado, the location in which it touched down, metro Boston, allowed it to do considerable damage before lifting.  Several injuries occurred, mainly from flying debris. This was the first tornado to hit Suffolk County since 1950, when modern record keeping began.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 28-JUL-14 08:40:00 to 28-JUL-14 09:20:00 (EST-5)
Location: INMAN SQUARE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Belmont, the common near Dark Street was nearly impassable due to flooding. In Winchester, a car was stuck in flood waters at the Swanson Street bridge and two cars were stuck at the Wedgemere Station bridge. Flash flooding made several roads impassable including a portion of Washington Street and Church Street at Lewis Street. In Medford, Windsor Road was flooded. In Somerville, Broomfield Road was flooded and impassable. The Lynnfield Tunnel on Route 1 in Lynnfield was flooded with three to four feet of water and was impassable. Flash flooding also affected Danvers where portions of Route 1 were closed and cars were stranded. In Peabody, Roosevelt Boulevard was flooded with four feet of water and Route 1 northbound by the Route 114 exit was closed due to three feet of water covering the roadway. Several cars were stranded in flood waters in Arlington.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 28-JUL-14 16:40:00 to 28-JUL-14 17:02:00 (EST-5)
Location: WILLOWS
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and wires were downed in Chelmsford on Donna Road, Park Road, and Proctor Road. Three trees were blown down on a house on Judith Road. In Westford, wires were downed on Beaver Brook Road and multiple trees were downed on Proctor Road. In Littleton, trees and wires were downed on Route 119. In Lowell, a tree was downed next to Rogers Street and Fort Hill Park.

Tornado in SUFFOLK, MASSACHUSETTS
From 28-JUL-14 08:32:00 to 28-JUL-14 08:36:00 (EST-5)
Location: CHELSEA
Tornado F-scale: EF2
Property damage: 4.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down in Chelsea, where a window was blown out on Dudley Street. However, the overwhelming majority of damage occurred in Revere.  Most of the damage was rated EF-1, but EF-2 rated damage did occur near Revere Beach Parkway.
From Chelsea, the tornado moved across the Chelsea River, directly across the Paul Cronin Memorial Skating Rink.  Portions of the rink's roof were blown northeastward across Route 16.  Numerous houses on Revere Beach Parkway were damaged, with one roof blown completely off.  In that same area, large oak trees were snapped in half.  Numerous trees were downed, some of which were lifted up and then deposited on top of houses immediately behind Revere Beach Parkway.
The damage was widespread throughout much of the center of Revere.  The tornado traveled northward, following Route 107 or Broadway for the most part.  Windows were blown out of town hall and the roof was damaged.  A large birch tree was uprooted near town hall.  Sixty-four structures sustained damage that ranged from siding torn off to roofs lifted or blown off.  Thirteen of these structures (6 - 1 & 2 family homes, 3 - multifamily homes, and 4 commercial buildings) were deemed uninhabitable by building inspectors.  Several store signs were destroyed. Debris from homes collected on fences.  Trees fell on cars, a few of these crushed.
Revere High School also sustained damage, mainly to the exterior.  Side panels, fencing, sidewalks, and air handlers on the roof were damaged.
Police reported a car that had been overturned at the intersection of Revere Street and Carleton Avenue. Finally, near the rotary at Route 60 and Broadway, a billboard was blown onto several cars.
City officials estimated that city owned buildings alone sustained at least 1.5 to 2 million dollars of damage.
While no major injuries were reported, several minor injuries occurred. An 86 year old woman suffered from a head laceration which she sustained from flying debris while standing outside a Dunkin Donuts.  A two week old baby girl strapped in the back seat of a truck was injured when a board flew through the rear windshield of the vehicle.  The board missed the infant but covered her in broken glass.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 28-JUL-14 15:38:00 to 28-JUL-14 15:40:00 (EST-5)
Location: BROOKFIELD
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large branch and wires were downed on a car in front of the Brookfield Fire Station. Large branches were downed on Allen Road in Sturbridge.

Thunderstorm Wind in FRANKLIN, MASSACHUSETTS
From 28-JUL-14 15:48:00 to 28-JUL-14 15:48:00 (EST-5)
Location: COOLEYVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and wires were downed on Cooleyville Road and Jennie Morr Road in New Salem.

Thunderstorm Wind in ESSEX, MASSACHUSETTS
From 28-JUL-14 17:20:00 to 28-JUL-14 17:20:00 (EST-5)
Location: HAVERHILL
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and wires were downed on Shawmut Avenue in Haverhill.

Thunderstorm Wind in NORFOLK, MASSACHUSETTS
From 28-JUL-14 07:55:00 to 28-JUL-14 07:55:00 (EST-5)
Location: NEEDHAM
Magnitude: 60.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A microburst occurred in Needham resulting in numerous uprooted trees and downed power lines on Country Way and Moseley Avenue.

Thunderstorm Wind in FRANKLIN, MASSACHUSETTS
From 28-JUL-14 15:00:00 to 28-JUL-14 15:33:00 (EST-5)
Location: GREENFIELD
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Greenfield, power lines were downed on West Street and Wisdom Way. Tree limbs fell on a police cruiser on Route 2 but there were no injuries. In Gill, trees and wires were downed on River Street and West Gill Street. Thunderstorm winds also downed trees and wires on Chestnut Lane in Turners Falls, on Parmenter Road in Berndardston, and on Captain Bears Plain Road and Burnham Road in Northfield.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 28-JUL-14 08:03:00 to 28-JUL-14 08:15:00 (EST-5)
Location: COCHITUATE
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

The entry to the Meditech building on Cochituate Road was flooded.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 28-JUL-14 08:32:00 to 28-JUL-14 08:45:00 (EST-5)
Location: GREENWOOD
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Grove Street was flooded with water lapping up onto the hood of a police cruiser.

Lightning in FRANKLIN, MASSACHUSETTS
From 28-JUL-14 05:54:00 to 28-JUL-14 05:54:00 (EST-5)
Location: BUCKLAND
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Lightning struck a tree, felling it onto a nearby house.

Lightning in MIDDLESEX, MASSACHUSETTS
From 28-JUL-14 08:30:00 to 28-JUL-14 08:30:00 (EST-5)
Location: LEXINGTON
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Lightning struck a house on Todd Road, setting it on fire.

Thunderstorm Wind in ESSEX, MASSACHUSETTS
From 28-JUL-14 10:10:00 to 28-JUL-14 10:10:00 (EST-5)
Location: EAST BOXFORD
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

Trees were downed by thunderstorm winds on Blueberry Lane and Rowley Road in Topsfield.

Thunderstorm Wind in HAMPDEN, MASSACHUSETTS
From 28-JUL-14 15:15:00 to 28-JUL-14 15:15:00 (EST-5)
Location: SOUTH MONSON
Magnitude: 50.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds downed a tree, wires, and utility pole on Lower Hampden Road in Monson.