A warm front lifted north across the region during the morning of the 11th allowing unseasonably warm and humid air to overspread the region. An upper level disturbance also began to approach during the evening hours. Severe thunderstorms developed during the late afternoon hours then continued into the evening producing an unusual late season severe weather event. The thunderstorms produced damaging winds and large hail. A tornado also briefly touched down in northern Piscataquis county.

Thunderstorm Wind in PISCATAQUIS, MAINE
From 11-SEP-13 14:40:00 to 11-SEP-13 14:40:00 (EST-5)
Location: CHURCHILL DAM
Magnitude: 61.00 EG
Reported by: Park/Forest Service

Numerous trees were toppled or snapped by wind gusts estimated at 70 mph. The time is estimated.

Tornado in PISCATAQUIS, MAINE
From 11-SEP-13 14:48:00 to 11-SEP-13 14:49:00 (EST-5)
Location: CHURCHILL DAM
Tornado F-scale: EF0
Reported by: Park/Forest Service

A high precipitation supercell thunderstorm produced a brief tornado which caused tree damage in the North Maine Woods. Maximum winds were estimated at around 80 mph...with an average path width around 100 yards. The storm which produced the tornado then quickly became outflow dominated and produced extensive straight line wind damage to trees further east-southeast along the path of the storm. Estimates were based on an aircraft survey of the damage path.

Thunderstorm Wind in AROOSTOOK, MAINE
From 11-SEP-13 15:15:00 to 11-SEP-13 15:25:00 (EST-5)
Location: OXBOW
Magnitude: 70.00 EG
Reported by: Law Enforcement

Extensive tree damage...with trees toppled and snapped...occurred from wind gusts estimated at 80 mph along the path of the storm. Vehicles were trapped along Route 11 due to the fallen trees. This wind damage was caused by the same storm which had produced the tornado in northern Piscataquis county.

Thunderstorm Wind in AROOSTOOK, MAINE
From 11-SEP-13 15:50:00 to 11-SEP-13 15:55:00 (EST-5)
Location: LITTLETON
Magnitude: 61.00 EG
Reported by: Law Enforcement

Numerous trees and power lines were toppled and snapped by wind gusts estimated at 70 mph.

Thunderstorm Wind in AROOSTOOK, MAINE
From 11-SEP-13 15:45:00 to 11-SEP-13 15:50:00 (EST-5)
Location: MONTICELLO
Magnitude: 61.00 EG
Reported by: Trained Spotter

Numerous trees and power lines were toppled or snapped by wind gusts estimated at 70 mph.

Thunderstorm Wind in AROOSTOOK, MAINE
From 11-SEP-13 15:40:00 to 11-SEP-13 15:45:00 (EST-5)
Location: BRIDGEWATER
Magnitude: 61.00 EG
Reported by: Law Enforcement

Numerous trees were toppled and snapped along Route 1 by wind gusts estimated at 70 mph.

Hail in PENOBSCOT, MAINE
From 11-SEP-13 15:55:00 to 11-SEP-13 15:55:00 (EST-5)
Location: SHIN POND
Magnitude: 1.00 
Reported by: Public

Hail in AROOSTOOK, MAINE
From 11-SEP-13 16:30:00 to 11-SEP-13 16:30:00 (EST-5)
Location: LINNEUS
Magnitude: 1.00 
Reported by: Public

Hail in AROOSTOOK, MAINE
From 11-SEP-13 16:15:00 to 11-SEP-13 16:15:00 (EST-5)
Location: OAKFIELD
Magnitude: 1.00 
Reported by: Public

The time is estimated.

Thunderstorm Wind in AROOSTOOK, MAINE
From 11-SEP-13 16:20:00 to 11-SEP-13 16:25:00 (EST-5)
Location: HOULTON
Magnitude: 52.00 EG
Reported by: Law Enforcement

Trees and power lines were toppled by wind gusts estimated at 60 mph.

Thunderstorm Wind in PENOBSCOT, MAINE
From 11-SEP-13 18:05:00 to 11-SEP-13 18:05:00 (EST-5)
Location: MATTAWAMKEAG
Magnitude: 52.00 EG
Reported by: Law Enforcement

Trees were toppled by wind gusts estimated at 60 mph.

Thunderstorm Wind in PENOBSCOT, MAINE
From 11-SEP-13 18:20:00 to 11-SEP-13 18:20:00 (EST-5)
Location: PRENTISS
Magnitude: 52.00 EG
Reported by: Law Enforcement

Trees were toppled by wind gusts estimated at 60 mph.