On May 26th, record warmth combined with a westward moving backdoor surface cold front from eastern Quebec-Maine-New Hampshire and a mid-atmospheric disturbance that moved south from Quebec to produce numerous thunderstorms in the northern Champlain Valley during the evening hours. Eventually, these thunderstorms combined with storms in the Champlain Valley of New York to develop a large meso-scale Convective Complex that affected southern Vermont, eastern New York, western Massachusetts and Connecticut during the nighttime hours.
There were numerous reports of branches and trees downed by thunderstorms winds, as well as hail up to one inch in diameter and some lightning strikes. Some trees fell on power lines, vehicles, mobile homes and a few houses with 20,000 customers without power at the height of the event. The hardest hit location was in Wells near Lake St. Catherine.

Thunderstorm Wind in RUTLAND, VERMONT
From 26-MAY-10 20:47:00 to 26-MAY-10 20:47:00 (EST-5)
Location: CHITTENDEN
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Measured 59 mph wind gust in Chittenden.

Thunderstorm Wind in ADDISON, VERMONT
From 26-MAY-10 20:40:00 to 26-MAY-10 20:40:00 (EST-5)
Location: ORWELL
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees and power lines down across Orwell.

Hail in CHITTENDEN, VERMONT
From 26-MAY-10 19:35:00 to 26-MAY-10 19:36:00 (EST-5)
Location: BURLINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Nickel to quarter size hail reported in downtown Burlington.

Hail in CHITTENDEN, VERMONT
From 26-MAY-10 19:40:00 to 26-MAY-10 19:40:00 (EST-5)
Location: WINOOSKI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail reported.

Hail in CHITTENDEN, VERMONT
From 26-MAY-10 19:50:00 to 26-MAY-10 19:50:00 (EST-5)
Location: CHARLOTTE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail reported in Charlotte.

Hail in RUTLAND, VERMONT
From 26-MAY-10 20:55:00 to 26-MAY-10 20:55:00 (EST-5)
Location: HYDEVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail as well as numerous trees down along Sandhill road in Castleton.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 26-MAY-10 19:15:00 to 26-MAY-10 19:15:00 (EST-5)
Location: MILTON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Large branches downed and boat blown off trailer due to thunderstorm winds.

Thunderstorm Wind in RUTLAND, VERMONT
From 26-MAY-10 20:55:00 to 26-MAY-10 20:55:00 (EST-5)
Location: HYDEVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several large trees downed by thunderstorm winds as well as quarter size hail on Sandhill road.

Hail in CHITTENDEN, VERMONT
From 26-MAY-10 19:10:00 to 26-MAY-10 19:10:00 (EST-5)
Location: WEST MILTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail reported as well as several large trees downed by thunderstorm winds on Sanderson road.

Hail in CHITTENDEN, VERMONT
From 26-MAY-10 19:12:00 to 26-MAY-10 19:13:00 (EST-5)
Location: COLCHESTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter size (One inch diameter) hail reported in Colchester.

Thunderstorm Wind in RUTLAND, VERMONT
From 26-MAY-10 20:45:00 to 26-MAY-10 20:45:00 (EST-5)
Location: FLORENCE JCT
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Trees down as well as quarter size hail along Fire Hill road in Florence.

Thunderstorm Wind in FRANKLIN, VERMONT
From 26-MAY-10 19:10:00 to 26-MAY-10 19:10:00 (EST-5)
Location: GEORGIA CENTER
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Partial roof torn off a home, as well as some tree damage.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 26-MAY-10 19:10:00 to 26-MAY-10 19:10:00 (EST-5)
Location: WEST MILTON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Trees downed by thunderstorm winds, as well as quarter size hail.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 26-MAY-10 19:10:00 to 26-MAY-10 19:10:00 (EST-5)
Location: WEST MILTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large trees downed by thunderstorm winds as well as quarter size hail on Sanderson road.

Thunderstorm Wind in RUTLAND, VERMONT
From 26-MAY-10 21:15:00 to 26-MAY-10 21:15:00 (EST-5)
Location: PAWLET
Magnitude: 55.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Several large Elm trees downed by thunderstorm winds with some minor roof and porch damage.

Thunderstorm Wind in ADDISON, VERMONT
From 26-MAY-10 20:00:00 to 26-MAY-10 20:00:00 (EST-5)
Location: MONKTON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Several broken and uprooted trees along Bennett road and neighboring streets.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 26-MAY-10 19:25:00 to 26-MAY-10 19:25:00 (EST-5)
Location: COLCHESTER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Large trees down, including 20 foot maple tree snapped and fell on house on Creek Glen road.

Lightning in CHITTENDEN, VERMONT
From 26-MAY-10 19:25:00 to 26-MAY-10 19:25:00 (EST-5)
Location: COLCHESTER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Emergency Medical Technician (EMT) got injured due to lightning strike to a nearby tree at the Rescue building.

Hail in CHITTENDEN, VERMONT
From 26-MAY-10 19:13:00 to 26-MAY-10 19:14:00 (EST-5)
Location: MILTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Dime to nickel size hail reported.

Hail in CHITTENDEN, VERMONT
From 26-MAY-10 19:20:00 to 26-MAY-10 19:21:00 (EST-5)
Location: MILTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail reported.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 26-MAY-10 19:25:00 to 26-MAY-10 19:25:00 (EST-5)
Location: ESSEX JCT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Measured wind gusts of 58 mph as well as some downed tree branches.

Hail in CHITTENDEN, VERMONT
From 26-MAY-10 19:28:00 to 26-MAY-10 19:30:00 (EST-5)
Location: WINOOSKI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail reported in Winooski.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 26-MAY-10 19:40:00 to 26-MAY-10 19:40:00 (EST-5)
Location: RHODE IS CORNERS
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Several large branches down along Oak Hill Road in St. George between Williston and Hinesburg.

Thunderstorm Wind in ADDISON, VERMONT
From 26-MAY-10 20:15:00 to 26-MAY-10 20:15:00 (EST-5)
Location: MIDDLEBURY
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous trees and power lines down across Middlebury.

Thunderstorm Wind in RUTLAND, VERMONT
From 26-MAY-10 20:55:00 to 26-MAY-10 20:55:00 (EST-5)
Location: WEST RUTLAND
Magnitude: 55.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees and power lines downed by thunderstorm winds along Route 4 between Rutland and Castleton as well as Route 7 between Pittsford and Rutland.

Thunderstorm Wind in RUTLAND, VERMONT
From 26-MAY-10 21:10:00 to 26-MAY-10 21:10:00 (EST-5)
Location: SOUTH POULTNEY
Magnitude: 70.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

Numerous large pines, maples and elm trees fallen on vehicles, homes and cottages between South Poultney and Wells along the shores of Lake St. Catherine and Route 30, including West Lake Road, Endless Brook Parkway and Idylewild Park Road.

Thunderstorm Wind in ADDISON, VERMONT
From 26-MAY-10 20:10:00 to 26-MAY-10 20:10:00 (EST-5)
Location: BRISTOL
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several large limbs down along Route 116 in Bristol.

Thunderstorm Wind in ADDISON, VERMONT
From 26-MAY-10 20:30:00 to 26-MAY-10 20:30:00 (EST-5)
Location: WHITING
Magnitude: 50.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Fifty foot or larger (50+ feet) Elm tree uprooted and fell on house that resulted in minor to moderate damage.

Thunderstorm Wind in RUTLAND, VERMONT
From 26-MAY-10 21:05:00 to 26-MAY-10 21:05:00 (EST-5)
Location: POULTNEY
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

Several trees downed by thunderstorm winds in various locations in and around Poultney.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 26-MAY-10 19:28:00 to 26-MAY-10 19:30:00 (EST-5)
Location: ESSEX CENTER
Magnitude: 55.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

Partial school gymnasium roof ripped off of Essex Elementary school due to thunderstorm winds.

Thunderstorm Wind in CHITTENDEN, VERMONT
From 26-MAY-10 19:25:00 to 26-MAY-10 19:25:00 (EST-5)
Location: COLCHESTER
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees and large branches down along Route 15 and Susie Wilson road.

Hail in RUTLAND, VERMONT
From 26-MAY-10 20:45:00 to 26-MAY-10 20:45:00 (EST-5)
Location: FLORENCE JCT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail and several trees down along Fire Hill Road.