A very energetic mid-atmospheric disturbance moved across the Great Lakes during the afternoon and evening of June 10th. This developed a surface low along a cold front, which moved across Vermont during the afternoon and evening hours. These features moved into a very warm, humid and unstable airmass draped across Vermont that resulted in two rounds of widespread severe thunderstorms.
The first round moved across Vermont during the early to mid afternoon hours and the second round occurred during the evening.
In Vermont...hundreds to thousands of trees were damaged, downed or uprooted which caused downed power lines and structural damage to numerous buildings and vehicles. Tens of thousands of customers lost power due to the storms, with some outages that lasted several days.

Thunderstorm Wind in CALEDONIA, VERMONT
From 10-JUN-08 15:18:00 to 10-JUN-08 15:18:00 (EST-5)
Location: BARNET
Magnitude: 55.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and wires down across portions of Barnet, Ryegate and lower Waterford.

Thunderstorm Wind in ORLEANS, VERMONT
From 10-JUN-08 18:10:00 to 10-JUN-08 18:10:00 (EST-5)
Location: JAY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees reported down by thunderstorm winds in Jay.

Thunderstorm Wind in ORLEANS, VERMONT
From 10-JUN-08 14:06:00 to 10-JUN-08 14:06:00 (EST-5)
Location: NORTH TROY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Numerous large branches and few trees down across North Troy.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 10-JUN-08 13:45:00 to 10-JUN-08 13:45:00 (EST-5)
Location: RICHMOND
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down on Kenyon Road in Richmond.

Hail in CHITTENDEN, VERMONT
From 10-JUN-08 13:25:00 to 10-JUN-08 13:25:00 (EST-5)
Location: SHELBURNE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail reported in Shelburne.

Thunderstorm Wind in ADDISON, VERMONT
From 10-JUN-08 14:01:00 to 10-JUN-08 14:01:00 (EST-5)
Location: BRISTOL
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees snapped and downed by thunderstorm winds in Bristol.

Hail in CHITTENDEN, VERMONT
From 10-JUN-08 13:18:00 to 10-JUN-08 13:18:00 (EST-5)
Location: SHELBURNE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail reported in South Burlington.

Thunderstorm Wind in FRANKLIN, VERMONT
From 10-JUN-08 14:00:00 to 10-JUN-08 14:00:00 (EST-5)
Location: RICHFORD
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down along Route 105 in Richford.

Thunderstorm Wind in FRANKLIN, VERMONT
From 10-JUN-08 13:45:00 to 10-JUN-08 13:45:00 (EST-5)
Location: ENOSBURG CENTER
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down on Boston Post Road and Route 108 in Enosburg.

Hail in ESSEX, VERMONT
From 10-JUN-08 15:20:00 to 10-JUN-08 15:20:00 (EST-5)
Location: CANAAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Penny size hail reported by law enforcement.

Hail in CHITTENDEN, VERMONT
From 10-JUN-08 13:43:00 to 10-JUN-08 13:43:00 (EST-5)
Location: WILLISTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Quarter size hail reported.

Thunderstorm Wind in WASHINGTON, VERMONT
From 10-JUN-08 14:42:00 to 10-JUN-08 14:42:00 (EST-5)
Location: RIVERTON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down along Route 12 in Berlin.

Thunderstorm Wind in FRANKLIN, VERMONT
From 10-JUN-08 13:36:00 to 10-JUN-08 13:36:00 (EST-5)
Location: SHAWVILLE
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down along Route 78 and other roads between Sheldon and Highgate.

Thunderstorm Wind in LAMOILLE, VERMONT
From 10-JUN-08 14:22:00 to 10-JUN-08 14:22:00 (EST-5)
Location: EDEN
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down along Route 118 in Eden.

Hail in CHITTENDEN, VERMONT
From 10-JUN-08 13:39:00 to 10-JUN-08 13:39:00 (EST-5)
Location: WILLISTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Nickel size hail reported as well as estimated wind gusts to 60 mph.

Thunderstorm Wind in FRANKLIN, VERMONT
From 10-JUN-08 13:27:00 to 10-JUN-08 13:27:00 (EST-5)
Location: GEORGIA CENTER
Magnitude: 55.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down along Route 7 in Georgia.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 10-JUN-08 13:15:00 to 10-JUN-08 13:15:00 (EST-5)
Location: (BTV)BURLINGTON ARPT
Magnitude: 55.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Employee

Barn Roof damaged, trees down across Van Slicken and Hinesburg roads in South Burlington.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 10-JUN-08 18:33:00 to 10-JUN-08 18:33:00 (EST-5)
Location: COLCHESTER
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees down within Colchester, especially near Mallets Bay.

Thunderstorm Wind in ORLEANS, VERMONT
From 10-JUN-08 14:49:00 to 10-JUN-08 14:49:00 (EST-5)
Location: BROWNINGTON VLG
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees down in the Brownington area.

Thunderstorm Wind in FRANKLIN, VERMONT
From 10-JUN-08 13:30:00 to 10-JUN-08 13:30:00 (EST-5)
Location: ST ALBANS
Magnitude: 55.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees down across St. Albans, including Lower Newton road toward Swanton.

Thunderstorm Wind in GRAND ISLE, VERMONT
From 10-JUN-08 13:25:00 to 10-JUN-08 13:25:00 (EST-5)
Location: NORTH HERO
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large 4 foot diameter tree as well as other trees down across North Hero with wind gust estimated at 70 mph.

Thunderstorm Wind in FRANKLIN, VERMONT
From 10-JUN-08 13:27:00 to 10-JUN-08 13:27:00 (EST-5)
Location: SWANTON
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines down across portions of Swanton, including Grand avenue.

Thunderstorm Wind in FRANKLIN, VERMONT
From 10-JUN-08 14:00:00 to 10-JUN-08 14:00:00 (EST-5)
Location: MONTGOMERY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down and power line lying across a truck on Route 118 in Montgomery.

Thunderstorm Wind in ORLEANS, VERMONT
From 10-JUN-08 19:45:00 to 10-JUN-08 19:45:00 (EST-5)
Location: LOWELL
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees downed by thunderstorm winds in Lowell.

Thunderstorm Wind in WINDSOR, VERMONT
From 10-JUN-08 19:00:00 to 10-JUN-08 19:00:00 (EST-5)
Location: WESTON
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Department of Highways

Numerous trees downed by thunderstorm winds encompassing an estimated 3 mile long by 100 feet wide path. Witnesses report unidirectional damage.

Thunderstorm Wind in WASHINGTON, VERMONT
From 10-JUN-08 20:00:00 to 10-JUN-08 20:00:00 (EST-5)
Location: PLAINFIELD
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines down in Plainfield.

Thunderstorm Wind in WASHINGTON, VERMONT
From 10-JUN-08 19:00:00 to 10-JUN-08 19:00:00 (EST-5)
Location: WARREN
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Post Office

Scattered trees down across Warren.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 10-JUN-08 19:00:00 to 10-JUN-08 19:00:00 (EST-5)
Location: NORTH UNDERHILL
Magnitude: 70.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees downed with winds estimated at 80 mph.

Thunderstorm Wind in ORLEANS, VERMONT
From 10-JUN-08 19:53:00 to 10-JUN-08 19:53:00 (EST-5)
Location: DERBY CENTER
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines down in Derby.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 10-JUN-08 18:42:00 to 10-JUN-08 18:42:00 (EST-5)
Location: MILTONBORO
Magnitude: 60.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many trees down across Milton, especially northern sections, including a barn collapse on Hibbard road.

Thunderstorm Wind in RUTLAND, VERMONT
From 10-JUN-08 19:40:00 to 10-JUN-08 19:40:00 (EST-5)
Location: HUBBARDTON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Several large trees and power lines downed by thunderstorm winds.

Thunderstorm Wind in WINDSOR, VERMONT
From 10-JUN-08 19:00:00 to 10-JUN-08 19:00:00 (EST-5)
Location: SMITHVILLE
Magnitude: 55.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Utility Company

Numerous reports of scattered trees and power lines down across the Ludlow vicinity.

Thunderstorm Wind in ORANGE, VERMONT
From 10-JUN-08 20:21:00 to 10-JUN-08 20:21:00 (EST-5)
Location: NORTH TUNBRIDGE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

State police report trees down in Tunbridge, including Monarch Hill and Cross roads.

Thunderstorm Wind in WINDSOR, VERMONT
From 10-JUN-08 20:10:00 to 10-JUN-08 20:10:00 (EST-5)
Location: LUDLOW
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees downed by thunderstorm winds in Ludlow.

Thunderstorm Wind in GRAND ISLE, VERMONT
From 10-JUN-08 13:12:00 to 10-JUN-08 13:12:00 (EST-5)
Location: ALBURG
Magnitude: 60.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees down that have blocked roads and caused structural damage throughout Alburgh.

Thunderstorm Wind in WASHINGTON, VERMONT
From 10-JUN-08 14:45:00 to 10-JUN-08 14:45:00 (EST-5)
Location: (MPV)-MONTPELIER ARPT
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down within Barre including Exit 6 on Interstate 89 Northbound.

Hail in RUTLAND, VERMONT
From 10-JUN-08 17:58:00 to 10-JUN-08 17:58:00 (EST-5)
Location: POULTNEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail reported in Poultney.

Thunderstorm Wind in WASHINGTON, VERMONT
From 10-JUN-08 14:45:00 to 10-JUN-08 14:45:00 (EST-5)
Location: SOUTH NORTHFIELD
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees down within Northfield as well as Exit 5 on Interstate 89 southbound.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 10-JUN-08 13:30:00 to 10-JUN-08 13:30:00 (EST-5)
Location: WILLISTON
Magnitude: 55.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: NWS Employee

Numerous trees down in Williston Village along Williston, North Williston, Governor Peck and other roads. Dozens of trees down across Williston Country Club and several trees knocking down power lines as well as fallen on a few homes.