Hot, humid conditions prevailed across the region.  Without much atmospheric forcing, it took a sea breeze boundary to set off strong thunderstorms, which became severe in eastern Massachusetts during the afternoon hours.  Localized flooding also occurred.

Lightning in MIDDLESEX, MASSACHUSETTS
From 21-JUN-20 16:04:00 to 21-JUN-20 16:04:00 (EST-5)
Location: WEST NEWTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A 62-year old woman was struck by lightning. She endured a side flash after lightning struck a tree near her.  She was alert and breathing at the scene but was transported to a hospital for further evaluation.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 21-JUN-20 16:03:00 to 21-JUN-20 16:12:00 (EST-5)
Location: WESTON
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A microburst with winds estimated near 65 mph caused damage in Weston (as well as Waltham and Wellesley).  In Weston, multiple large trees and wires were down on Meadowbrook Road. Three large 2-foot oak trees were downed on Summer Street.  Large branches were down on North Avenue, Pine Street, and South Street.  A big tree was down on Rolling Lane.  A 10-inch diameter tree was down on Doublet Hill Road.  Two power poles were broken and Eversource, the utility company, was there all night.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 21-JUN-20 16:02:00 to 21-JUN-20 16:25:00 (EST-5)
Location: WESTON
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A microburst with winds of approximately 65 mph caused damage in Waltham (as well as Weston and Wellesley).  In Waltham, three trees were downed and leaning on a house on Florence Road, causing minor damage.  A large tree was down on Lincoln Street.  Tree branches were down on a house and deck on Keach Terrace.  A tree fell onto a vehicle on Vernon Street.  Numerous trees were down in the vicinity of Brandeis University.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 21-JUN-20 14:44:00 to 21-JUN-20 14:58:00 (EST-5)
Location: DRACUT
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Lowell, a large tree was down near the intersection of VFW Highway and Aiken Street. Also, a tree and wires were down on East Merrimack Street and a tree was down on Pawtucket Blvd.  In Tewksbury, a tree was down on wires on Whipple Road.

Flood in NORFOLK, MASSACHUSETTS
From 21-JUN-20 16:43:00 to 21-JUN-20 16:43:00 (EST-5)
Location: WELLESLEY FELLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Wellesley, there was significant flooding at Wellesley Fire Headquarters on Route 9. On Haskins Road, a car was stuck in flood waters.  A car was stuck in flood waters on the Route 9 bridge.

Flood in NORFOLK, MASSACHUSETTS
From 21-JUN-20 15:25:00 to 21-JUN-20 15:35:00 (EST-5)
Location: HOLBROOK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Holbrook, a nearly stationary thunderstorm along a sea breeze front caused one foot of street flooding at Route 139 and Poole Circle and on South Franklin Street (Route 37) just north of Collins Road.

Flood in NORFOLK, MASSACHUSETTS
From 21-JUN-20 15:40:00 to 21-JUN-20 16:05:00 (EST-5)
Location: RANDOLPH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Randolph, Highland Glen Drive at Gloversbrook Road was flooded and impassable.  Flooding on Highland Glen Drive extended westward to Birchwood Road and Bittersweet Lane. A car was stuck on Leavitt Brook Road at Highland Glen. Four cars were stranded at Highland Avenue at Warren Street, due to two feet of standing water from torrential rains.  Another car was stuck on Plain Street at Howard Street.

Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUN-20 16:14:00 to 21-JUN-20 16:40:00 (EST-5)
Location: WESTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Waltham, a car was stuck in flooding on Second Avenue...no water inside the vehicle.  At 440 PM EST (540 PM EDT), a portion of Route 128 Southbound at Route 20 was flooded and impassable. Six to twelve inches of water was observed on South Street at Charlesbank Way.

Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUN-20 16:40:00 to 21-JUN-20 16:40:00 (EST-5)
Location: WELLESLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Weston, River Road was flooded and impassable.  There was also a report of street flooding on Boston Post Road, farther to the northwest of River Road.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 21-JUN-20 16:35:00 to 21-JUN-20 16:35:00 (EST-5)
Location: NEWTON LOWER FALLS
Magnitude: 50.00 EG
Property damage: 1.20K
Crop damage: 0.00K
Reported by: Amateur Radio

In Wellesley, a tree was downed, blocking Wall Street at Alba Road.  Another tree was down at Bernard and Alba Roads.  A large tree branch was down at the corner of Washington Street (Route 16) and Cliff Road.