Severe thunderstorms developed across northern Maine during the late afternoon and evening of the 31st in advance of a cold front and upper disturbance crossing the region. The thunderstorms produced damaging winds...large hail and several tornados.

Thunderstorm Wind in AROOSTOOK, MAINE
From 31-MAY-09 16:05:00 to 31-MAY-09 16:05:00 (EST-5)
Location: ST CROIX
Magnitude: 52.00 EG
Reported by: Department of Highways

A 12 inch diameter spruce tree was toppled on State Route 11 by wind gusts estimated at 60 mph.

Tornado in AROOSTOOK, MAINE
From 31-MAY-09 16:29:00 to 31-MAY-09 16:35:00 (EST-5)
Location: WESTFIELD
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A mini-supercell thunderstorm produced an EF1 tornado near the town of Westfield. The tornado began near the Little Burnt Land Stream area...then was intermittently on the ground before lifting just west of U.S. Route 1 near Westfield. Along the tornado path...hundreds of trees were snapped and uprooted in intermittent swaths and patches (DI 27, DOD 4). Several outbuildings were also damaged or destroyed along Simpson and Shorey Roads near Westfield. Based on the damage...the tornado winds were estimated at around 95 mph. This same thunderstorm continued tracking northeast across U.S. Route 1 and Westfield...producing another tornado several miles further along its track in the vicinity of Easton.

Tornado in AROOSTOOK, MAINE
From 31-MAY-09 16:42:00 to 31-MAY-09 16:57:00 (EST-5)
Location: WESTFIELD
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A mini-supercell thunderstorm produced an EF1 tornado in the vicinity of Easton. The tornado touched down near the Egypt Road and was intermittently on the ground while tracking northeast across U.S. Route 1A south of Easton before dissipating just before crossing the border into New Brunswick. Along the tornado path...hundreds of trees were snapped or uprooted in intermittent swaths and patches (DI 27, DOD 4). Several outbuildings were also damaged or destroyed. The metal roof of a dairy barn was destroyed in Easton. Based on the damage...the tornado winds were estimated at around 95 mph. The average path width was around 50 yards. This same thunderstorm had produced another tornado several minutes earlier in the vicinity of Westfield.

Tornado in AROOSTOOK, MAINE
From 31-MAY-09 16:00:00 to 31-MAY-09 16:02:00 (EST-5)
Location: ST CROIX
Tornado F-scale: EF0
Reported by: NWS Storm Survey

A mini-supercell thunderstorm produced an EF0 tornado southeast of the town of Oxbow. The tornado began near the Oak Hill Lookout then was intermittently on the ground while travelling northeast across State Route 11 before dissipating. Along the tornado path...dozens of trees were snapped or uprooted in intermittent swaths and patches (DI 27, DOD 3). Based on the damage...the tornado winds were estimated at around 80 mph. The average path width was around 50 yards.

Thunderstorm Wind in AROOSTOOK, MAINE
From 31-MAY-09 16:46:00 to 31-MAY-09 16:46:00 (EST-5)
Location: EASTON
Magnitude: 56.00 EG
Reported by: NWS Storm Survey

Several trees were toppled on Bangor Road by wind gusts estimated at 65 mph. Some outbuildings were damaged by the falling trees.

Thunderstorm Wind in AROOSTOOK, MAINE
From 31-MAY-09 16:46:00 to 31-MAY-09 16:46:00 (EST-5)
Location: EASTON
Magnitude: 56.00 EG
Reported by: NWS Storm Survey

A large tree was toppled on West Ridge Road by wind gusts estimated at 65 mph.

Hail in AROOSTOOK, MAINE
From 31-MAY-09 16:50:00 to 31-MAY-09 16:50:00 (EST-5)
Location: PRESQUE ISLE
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in AROOSTOOK, MAINE
From 31-MAY-09 16:50:00 to 31-MAY-09 16:50:00 (EST-5)
Location: PRESQUE ISLE
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in AROOSTOOK, MAINE
From 31-MAY-09 17:05:00 to 31-MAY-09 17:05:00 (EST-5)
Location: FT FAIRFIELD
Magnitude: 0.88 
Reported by: Public

Thunderstorm Wind in PISCATAQUIS, MAINE
From 31-MAY-09 15:15:00 to 31-MAY-09 15:15:00 (EST-5)
Location: CHESUNCOOK
Magnitude: 52.00 EG
Reported by: Park/Forest Service

A large tree was toppled on Roaring Brook Road in Baxter State Park by wind gusts estimated at 60 mph.

Hail in AROOSTOOK, MAINE
From 31-MAY-09 16:40:00 to 31-MAY-09 16:40:00 (EST-5)
Location: WESTFIELD
Magnitude: 1.00 
Reported by: NWS Employee

Hail in AROOSTOOK, MAINE
From 31-MAY-09 16:45:00 to 31-MAY-09 16:45:00 (EST-5)
Location: EASTON
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in AROOSTOOK, MAINE
From 31-MAY-09 16:46:00 to 31-MAY-09 16:46:00 (EST-5)
Location: EASTON
Magnitude: 56.00 EG
Reported by: NWS Storm Survey

A large tree was snapped 10 feet above the ground on West Ridge Road by wind gusts estimated at 65 mph.