A cold front moved east from the Great Lakes, crossing Massachusetts during the night of the 17th.  The thunderstorms brought strong wind gusts and wind damage during the afternoon and evening.  Thunderstorms also brought downpours in Western, Central, and Northeast Massachusetts. Two to four inches of rain fell from Westfield through Worcester to Boston.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 17-JUL-18 12:15:00 to 17-JUL-18 12:15:00 (EST-5)
Location: BENNETT HALL
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 12:15 PM EST, a thunderstorm over Billerica brought a large tree down on Salem Road.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 17-JUL-18 12:28:00 to 17-JUL-18 12:28:00 (EST-5)
Location: BILLERICA
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 12:28 PM EST, a thunderstorm over Billerica brought a large tree down between Friendship Street and Clinton Street.

Thunderstorm Wind in MIDDLESEX, MASSACHUSETTS
From 17-JUL-18 12:31:00 to 17-JUL-18 12:31:00 (EST-5)
Location: SILVER LAKE
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 12:31 PM EST, a thunderstorm over Wilmington brought a tree down across Allston Avenue.

Thunderstorm Wind in SUFFOLK, MASSACHUSETTS
From 17-JUL-18 13:15:00 to 17-JUL-18 13:15:00 (EST-5)
Location: BOSTON
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1:15 PM EST, a thunderstorm over Boston brought a tree down on Dorchester Avenue.

Thunderstorm Wind in HAMPSHIRE, MASSACHUSETTS
From 17-JUL-18 13:36:00 to 17-JUL-18 13:36:00 (EST-5)
Location: HOCKANUM
Magnitude: 50.00 EG
Property damage: 55.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1:36 PM EST, a thunderstorm brought seven utility poles down on State Route 47 at the Hadley town line.

Flash Flood in HAMPDEN, MASSACHUSETTS
From 17-JUL-18 13:17:00 to 17-JUL-18 15:17:00 (EST-5)
Location: SMITH HIGHLANDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 1:17 PM EST, the bottom of Simard Drive in Chicopee was flooded and impassable.

Flash Flood in HAMPDEN, MASSACHUSETTS
From 17-JUL-18 14:00:00 to 17-JUL-18 17:00:00 (EST-5)
Location: WEST SPRINGFIELD
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 2 PM EST,  a thunderstorm moving over Westfield and West Springfield created downpours over the area.  A car was trapped in flood waters on Old Westfield Road in West Springfield.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 17-JUL-18 11:20:00 to 17-JUL-18 11:20:00 (EST-5)
Location: WATERVILLE
Magnitude: 45.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 11:20 AM EST, a thunderstorm moving over Lake Dennison brought a tree down on wires on the state highway at the entrance to Lake Dennison.

Thunderstorm Wind in PLYMOUTH, MASSACHUSETTS
From 17-JUL-18 17:10:00 to 17-JUL-18 17:10:00 (EST-5)
Location: MONTELLO
Magnitude: 45.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 5:10 PM EST, a thunderstorm near Brockton brought several trees and wires down on Winter Street.

Flash Flood in WORCESTER, MASSACHUSETTS
From 17-JUL-18 15:50:00 to 17-JUL-18 18:00:00 (EST-5)
Location: FAYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 3:50 PM EST, heavy rain brought one foot of flooding at the intersection of state route 9 and state route 126 in Framingham.

Flash Flood in HAMPDEN, MASSACHUSETTS
From 17-JUL-18 14:09:00 to 17-JUL-18 17:00:00 (EST-5)
Location: INGLESIDE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 2:09 PM EST, Meeting House Road in Chicopee was flooded and impassable.

Flash Flood in HAMPDEN, MASSACHUSETTS
From 17-JUL-18 14:10:00 to 17-JUL-18 17:10:00 (EST-5)
Location: WEST SPRINGFIELD
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 2:10 PM EST, heavy rain from a thunderstorm flooded and closed U.S.Route 20 in Westfield at the intersection with East Mountain Road.  A car was trapped in the flood waters.

Flash Flood in WORCESTER, MASSACHUSETTS
From 17-JUL-18 14:55:00 to 17-JUL-18 18:00:00 (EST-5)
Location: WORCESTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 2:55 PM EST, heavy rain in Worcester brought street flooding to a depth of one foot at the intersection of Chandler Street and Murray Avenue.

Flash Flood in WORCESTER, MASSACHUSETTS
From 17-JUL-18 15:10:00 to 17-JUL-18 18:00:00 (EST-5)
Location: WEST AUBURN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Airplane Pilot

At 3:10 PM EST, a downpour over Auburn flooded the intersection of U.S. Route 20 and Southbridge Street.  A water depth of 18 inches was reported on Route 20.

Flash Flood in WORCESTER, MASSACHUSETTS
From 17-JUL-18 15:48:00 to 17-JUL-18 18:30:00 (EST-5)
Location: WORCESTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 3:48 PM EST, heavy rain flooded Pelham Street in Worcester to a depth of three feet.

Flash Flood in WORCESTER, MASSACHUSETTS
From 17-JUL-18 16:22:00 to 17-JUL-18 18:40:00 (EST-5)
Location: BLACKSTONE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 4:22 pm EST heavy rain in Blackstone made Rathbun Street at Champlain Avenue flooded and impassable.

Thunderstorm Wind in NORFOLK, MASSACHUSETTS
From 17-JUL-18 16:45:00 to 17-JUL-18 16:45:00 (EST-5)
Location: ENDICOTT
Magnitude: 45.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 4:45 PM EST, a thunderstorm brought wires and a transformer down on Everett Street in Norwood.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 17-JUL-18 16:25:00 to 17-JUL-18 18:50:00 (EST-5)
Location: FELCHVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 4:25 PM EST, the intersection of State Route 9 and State Route 27 in Natick was closed due to flooding.

Flash Flood in SUFFOLK, MASSACHUSETTS
From 17-JUL-18 14:57:00 to 17-JUL-18 17:30:00 (EST-5)
Location: WINTHROP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 4:57 PM EST, Crest Avenue in Winthrop was flooded and impassable.

Thunderstorm Wind in HAMPSHIRE, MASSACHUSETTS
From 17-JUL-18 11:22:00 to 17-JUL-18 11:22:00 (EST-5)
Location: WESTHAMPTON
Magnitude: 45.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 11:22 PM EST, a thunderstorm moving over Westhampton brought a tree down on a house and car on Southampton Road.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 17-JUL-18 11:58:00 to 17-JUL-18 11:58:00 (EST-5)
Location: EAST GARDNER
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 11:58 AM EST, a thunderstorm over Westminster brought a tree down on Shady Avenue, blocking the road.

Thunderstorm Wind in WORCESTER, MASSACHUSETTS
From 17-JUL-18 12:20:00 to 17-JUL-18 12:20:00 (EST-5)
Location: WHALOM
Magnitude: 45.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 12:20 PM EST, a thunderstorm approaching Leominster brought a tree down on Pleasant Street near Showlan Farms.

Flash Flood in SUFFOLK, MASSACHUSETTS
From 17-JUL-18 17:09:00 to 17-JUL-18 19:05:00 (EST-5)
Location: EAST BOSTON
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 5:09 PM EST, the access road for Logan Airport at Terminal B Lower Level was flooded. Several cars were stalled in the flood waters.

Flash Flood in MIDDLESEX, MASSACHUSETTS
From 17-JUL-18 17:29:00 to 17-JUL-18 20:00:00 (EST-5)
Location: CAMBRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 5:29 PM EST the Memorial Ave underpass under Massachusetts Avenue was flooded and impassable.