A warm front stalled across Connecticut and Rhode Island, producing thunderstorms with very heavy rainfall.  This caused significant flash flooding.  Also, wind shear was just strong enough for a few thunderstorms to become severe, with locally damaging wind gusts.  A Tornado Warning was even issued for a storm in northern Worcester County, but no tornado damage was reported.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 15:36:00 to 21-JUL-23 15:36:00 (EST-5)
Location: WEST TOWNSEND
Magnitude: 50.00 EG
Property damage: 0.80K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

In Townsend, a tree was down on wires on Barker Hill Road near Turnpike Road.  Report relayed by amateur radio.

Hail in HAMPDEN, MASSACHUSETTS
From 21-JUL-23 19:35:00 to 21-JUL-23 19:35:00 (EST-5)
Location: HIGHLANDS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Holyoke, nickel size hail was reported.

Thunderstorm Wind in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 19:20:00 to 21-JUL-23 19:20:00 (EST-5)
Location: NORTH SUNDERLAND
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Deerfield, two trees were down on River Road, north of Hillside Road.

Lightning in NORFOLK, MASSACHUSETTS
From 21-JUL-23 21:06:00 to 21-JUL-23 21:06:00 (EST-5)
Location: WELLESLEY FELLS
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Law Enforcement

In Wellesley, lightning struck a tree on Schaller Street, igniting it, per Police Twitter account.

Thunderstorm Wind in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 18:50:00 to 21-JUL-23 18:50:00 (EST-5)
Location: SHELBURNE
Magnitude: 50.00 EG
Property damage: 0.80K
Crop damage: 0.00K
Reported by: Law Enforcement

In Greenfield, a tree and wires were down on South Shelburne Road.  Report relayed by amateur radio.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 21-JUL-23 20:35:00 to 21-JUL-23 20:35:00 (EST-5)
Location: NORTH BROOKFIELD
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

In North Brookfield, a tree was down on Ayers Street.  Report relayed by amateur radio.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 17:31:00 to 21-JUL-23 18:31:00 (EST-5)
Location: RIVER PINES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Billerica, Rogers St bridge was closed due to street flooding.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 17:43:00 to 21-JUL-23 18:43:00 (EST-5)
Location: WESTFORD STATION
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Westford, there were 4 inches of water in a basement with 6-12 inches of flooding in a driveway on Polley Rd.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 17:50:00 to 21-JUL-23 18:50:00 (EST-5)
Location: NORTH TEWKSBURY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

In Dracut, Troll Brook Ln was flooded with a sinkhole in the yard of a residence.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 18:45:00 to 21-JUL-23 19:45:00 (EST-5)
Location: TURNERS FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

In Greenfield, Rt 2 was closed at Adams Rd.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 21-JUL-23 20:35:00 to 21-JUL-23 20:35:00 (EST-5)
Location: EAST BROOKFIELD ARPT
Magnitude: 50.00 EG
Property damage: 1.30K
Crop damage: 0.00K
Reported by: Law Enforcement

In East Brookfield, trees and wires were down on Shore Road.  Report relayed by amateur radio.

Flash Flood in SUFFOLK, MASSACHUSETTS
From 21-JUL-23 20:55:00 to 21-JUL-23 21:55:00 (EST-5)
Location: FRANKLIN PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

In Revere, multiple cars were stuck in street flooding on Rt 1.

Flash Flood in SUFFOLK, MASSACHUSETTS
From 21-JUL-23 21:02:00 to 21-JUL-23 22:02:00 (EST-5)
Location: CHELSEA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

In Chelsea, there was significant street flooding on Rt 1 near Carter St.

Flash Flood in SUFFOLK, MASSACHUSETTS
From 21-JUL-23 21:20:00 to 21-JUL-23 22:20:00 (EST-5)
Location: REVERE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Chelsea, several basements were flooded on Garfield and Columbus Aves.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 21:40:00 to 21-JUL-23 22:40:00 (EST-5)
Location: UNION MARKET
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Belmont, Washington St was flooded and impassable.

Flash Flood in NORFOLK, MASSACHUSETTS
From 21-JUL-23 21:02:00 to 21-JUL-23 22:02:00 (EST-5)
Location: WELLESLEY FELLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Wellesley, Rt 9 was flooded.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 21:39:00 to 21-JUL-23 22:39:00 (EST-5)
Location: CAMBRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Cambridge, there was major flooding on the corner of Green St and Western Ave.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 20:00:00 to 21-JUL-23 21:00:00 (EST-5)
Location: METCALF
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Holliston, there was signficant basement flooding on Wedgewood Dr.

Flash Flood in SUFFOLK, MASSACHUSETTS
From 21-JUL-23 20:46:00 to 21-JUL-23 21:46:00 (EST-5)
Location: REVERE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Revere, there was significant street flooding on part of Reservoir Ave near Prospect Ave. Multiple basements were flooded.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 20:50:00 to 21-JUL-23 21:50:00 (EST-5)
Location: WATERTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Watertown, a car was stuck in flooding at School St and Spruce St.

Flash Flood in SUFFOLK, MASSACHUSETTS
From 21-JUL-23 20:40:00 to 21-JUL-23 21:40:00 (EST-5)
Location: REVERE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Chelsea, Spruce St at Everett St was flooded and closed.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 12:57:00 to 21-JUL-23 13:57:00 (EST-5)
Location: BURKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

In Conway, there was a flooded basement on Maple St with 2 feet of water and rising.

Flash Flood in SUFFOLK, MASSACHUSETTS
From 21-JUL-23 21:55:00 to 21-JUL-23 22:55:00 (EST-5)
Location: WEST ROXBURY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In West Roxbury, Spring St was closed due to flooding.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 22:06:00 to 21-JUL-23 23:06:00 (EST-5)
Location: EAST EVERETT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Everett, there was flooding at 3rd St on the Chelsea line. Multiple vehicles were stranded due to flooding with trapped occupants. Water rescues were done.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 13:22:00 to 21-JUL-23 14:22:00 (EST-5)
Location: SOUTH ASHFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

In Conway, there was significant street flooding on Main Poland rd.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 13:50:00 to 21-JUL-23 14:50:00 (EST-5)
Location: WEST DEERFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Deerfield, a section of Stillwater Rd was washed out.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 13:07:00 to 21-JUL-23 14:07:00 (EST-5)
Location: BURKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

In Conway, there was a flooded basement on River St.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 13:25:00 to 21-JUL-23 14:25:00 (EST-5)
Location: BURKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

In Conway, the South River was overflowing its banks and flooded Rt 116, starting to wash out the road.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 14:00:00 to 21-JUL-23 15:00:00 (EST-5)
Location: CONWAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

In Conway, Rt 116 was closed at the Deerfield town line.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 14:10:00 to 21-JUL-23 15:10:00 (EST-5)
Location: WEST ORANGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Orange, Dexter St had significant flooding.

Flash Flood in WORCESTER, MASSACHUSETTS
From 21-JUL-23 17:00:00 to 21-JUL-23 18:00:00 (EST-5)
Location: HUBBARDSTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

In Hubbardston, there was urban flooding with a car stuck in floodwaters.

Flash Flood in WORCESTER, MASSACHUSETTS
From 21-JUL-23 17:00:00 to 21-JUL-23 18:00:00 (EST-5)
Location: FITCHBURG MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

In Leominster, both lanes of Rt 2 were closed.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 17:30:00 to 21-JUL-23 18:30:00 (EST-5)
Location: NORTH CHELMSFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Lowell, a Jeep was stuck in street flooding on Wellman Ave.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 17:50:00 to 21-JUL-23 18:50:00 (EST-5)
Location: LOWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

In Lowell, Douglas Rd was flooded to 3 feet.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 14:15:00 to 21-JUL-23 15:15:00 (EST-5)
Location: DEERFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Deerfield, Lower Rd was closed and 14 feet of the road collapsed. A car fell into the washed out portion and the occupant was rescued.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 14:40:00 to 21-JUL-23 15:40:00 (EST-5)
Location: BURKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

In Conway, Adams Rd was washed out.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 13:20:00 to 21-JUL-23 14:20:00 (EST-5)
Location: GREENFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Greenfield, there was significant street flooding on sections of High St and Hastings Rd.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 17:34:00 to 21-JUL-23 17:35:00 (EST-5)
Location: GROTON
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Amateur Radio

In Groton, a tree was down on Chicopee Row.  Trees and wires were down near Hollis Street.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 20:46:00 to 21-JUL-23 21:46:00 (EST-5)
Location: ASHLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Ashland, two cars were stuck in flood waters on Chestnut St at Rosebay Dr.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 14:44:00 to 21-JUL-23 15:44:00 (EST-5)
Location: BURKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

In Conway, downtown was flooded up through the first floor of buildings.

Flash Flood in FRANKLIN, MASSACHUSETTS
From 21-JUL-23 13:40:00 to 21-JUL-23 14:40:00 (EST-5)
Location: BURKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Conway, there was significant flooding of Upper Baptist Rd and runoff was flowing into a residence.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 21-JUL-23 18:20:00 to 21-JUL-23 19:20:00 (EST-5)
Location: RIVER PINES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Billerica, Mt Pleasant St at the MBTA bridge was closed due to flooding with a car stuck.

Lightning in WORCESTER, MASSACHUSETTS
From 21-JUL-23 19:40:00 to 21-JUL-23 19:40:00 (EST-5)
Location: OXFORD ARPT
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

In Oxford, a lightning strike caused damage to the electrical system of a house on Hillcrest Drive.