A healthy upper level trough and frontal boundary moved from Ontario into VT during the overnight hours of July 20th. Ahead of this system, a vigorous squall line of thunderstorms that developed in Ontario during the early afternoon hours moved across northern NY from mid-afternoon into the evening hours and evening hours across VT with numerous reports of damaging winds.

Thunderstorm Wind in GRAND ISLE, VERMONT
From 20-JUL-21 17:55:00 to 20-JUL-21 17:57:00 (EST-5)
Location: ALBURG
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree down on power lines on west shore road as well as other tree damage.

Thunderstorm Wind in ADDISON, VERMONT
From 20-JUL-21 17:59:00 to 20-JUL-21 18:00:00 (EST-5)
Location: MONKTON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree and branches down on Hardscrabble and adjacent roads.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 20-JUL-21 17:59:00 to 20-JUL-21 18:01:00 (EST-5)
Location: BURLINGTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree down on car at the intersection of Marble and St. Paul streets. No injuries. Other scattered tree damage within the city.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 20-JUL-21 18:02:00 to 20-JUL-21 18:04:00 (EST-5)
Location: (BTV)BURLINGTON ARPT
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several reports of trees down in South Burlington, including White Street ,Airport road and Interstate 89 between Exits 12 and 13.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 20-JUL-21 18:04:00 to 20-JUL-21 18:04:00 (EST-5)
Location: WILLISTON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Many branches and a few trees downed by winds.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 20-JUL-21 18:06:00 to 20-JUL-21 18:06:00 (EST-5)
Location: ESSEX CENTER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Employee

A few large trees downed by winds in town.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 20-JUL-21 18:30:00 to 20-JUL-21 18:32:00 (EST-5)
Location: UNDERHILL FLATS
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees and utility lines downed by thunderstorm winds on Poker Hill road.

Thunderstorm Wind in ADDISON, VERMONT
From 20-JUL-21 18:30:00 to 20-JUL-21 18:30:00 (EST-5)
Location: LINCOLN
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Local Official

Several trees and utility lines downed by thunderstorm winds.

Thunderstorm Wind in WASHINGTON, VERMONT
From 20-JUL-21 18:45:00 to 20-JUL-21 18:45:00 (EST-5)
Location: WAITSFIELD
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees and power lines across roads.

Thunderstorm Wind in WASHINGTON, VERMONT
From 20-JUL-21 18:58:00 to 20-JUL-21 19:00:00 (EST-5)
Location: ROXBURY
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Local Official

Several trees and utility lines downed by thunderstorm winds on several roads. Also, some flooding.

Thunderstorm Wind in ORANGE, VERMONT
From 20-JUL-21 20:03:00 to 20-JUL-21 20:04:00 (EST-5)
Location: THETFORD
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Several trees downed by thunderstorm winds.

Thunderstorm Wind in WINDSOR, VERMONT
From 20-JUL-21 20:02:00 to 20-JUL-21 20:02:00 (EST-5)
Location: NORWICH
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees downed by thunderstorm winds.

Thunderstorm Wind in WINDSOR, VERMONT
From 20-JUL-21 20:02:00 to 20-JUL-21 20:02:00 (EST-5)
Location: NEW BOSTON
Magnitude: 60.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Many trees uprooted in a straight line in the New Boston area.

Thunderstorm Wind in WINDSOR, VERMONT
From 20-JUL-21 20:07:00 to 20-JUL-21 20:07:00 (EST-5)
Location: WOODSTOCK
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

A couple of Poplar trees down across utility lines.

Flash Flood in WASHINGTON, VERMONT
From 20-JUL-21 19:02:00 to 20-JUL-21 21:00:00 (EST-5)
Location: IRASVILLE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Butternut Hill Road washed out gravel road due to heavy rainfall.