A late summer surge of heat and humidity enveloped much of the northeast on the 11th of September. Afternoon temperatures climbed into the lower to mid 90s with dew points in the lower 70s resulting in high CAPE values throughout the forecast area. In addition, a very strong low to mid level jet was in place across the region producing a highly sheared environment. Late afternoon convection developing over western New England quickly formed into a large squall line with numerous bowing segments. This line of storms produced numerous reports of wind damage and large hail as it crossed the forecast area through the late evening hours before pushing offshore shortly before midnight.

Hail in KENNEBEC, MAINE
From 11-SEP-13 19:25:00 to 11-SEP-13 19:29:00 (EST-5)
Location: WINTHROP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm produced 0.88 inch hail in Winthrop.

Hail in CUMBERLAND, MAINE
From 11-SEP-13 20:00:00 to 11-SEP-13 20:04:00 (EST-5)
Location: WINDHAM CENTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1 inch hail on Shady Lane in Windham.

Hail in CUMBERLAND, MAINE
From 11-SEP-13 20:15:00 to 11-SEP-13 20:19:00 (EST-5)
Location: WINDHAM CENTER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A severe thunderstorm produced 1.5 inch hail in Windham.

Hail in CUMBERLAND, MAINE
From 11-SEP-13 20:20:00 to 11-SEP-13 20:25:00 (EST-5)
Location: WINDHAM CENTER
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm produced 2 inch hail in Windham.

Hail in CUMBERLAND, MAINE
From 11-SEP-13 20:46:00 to 11-SEP-13 20:50:00 (EST-5)
Location: YARMOUTH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm produced 0.75 inch hail in Yarmouth.

Hail in CUMBERLAND, MAINE
From 11-SEP-13 21:30:00 to 11-SEP-13 21:34:00 (EST-5)
Location: PORTLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm produced 1 inch hail in Portland.

Thunderstorm Wind in OXFORD, MAINE
From 11-SEP-13 18:20:00 to 11-SEP-13 18:25:00 (EST-5)
Location: FRYEBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed a tree on Fish Street in Fryeburg.

Thunderstorm Wind in KENNEBEC, MAINE
From 11-SEP-13 19:25:00 to 11-SEP-13 19:29:00 (EST-5)
Location: LITCHFIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed trees on Plains and Maxwell Roads in Litchfield.

Thunderstorm Wind in KENNEBEC, MAINE
From 11-SEP-13 19:25:00 to 11-SEP-13 19:29:00 (EST-5)
Location: WINTHROP
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm downed trees on Narrows Pond Road near Winthrop.

Thunderstorm Wind in LINCOLN, MAINE
From 11-SEP-13 19:25:00 to 11-SEP-13 19:30:00 (EST-5)
Location: JEFFERSON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees at the intersection of Routes 126 and 215 in Jefferson.

Thunderstorm Wind in OXFORD, MAINE
From 11-SEP-13 18:45:00 to 11-SEP-13 18:49:00 (EST-5)
Location: SOUTH PARIS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm downed large branches in South Paris.

Thunderstorm Wind in YORK, MAINE
From 11-SEP-13 20:55:00 to 11-SEP-13 20:59:00 (EST-5)
Location: PARSON FIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm downed trees in Parsonsfield.

Thunderstorm Wind in OXFORD, MAINE
From 11-SEP-13 20:55:00 to 11-SEP-13 20:58:00 (EST-5)
Location: FRYEBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm downed trees in Fryeburg.

Thunderstorm Wind in KNOX, MAINE
From 11-SEP-13 20:10:00 to 11-SEP-13 20:15:00 (EST-5)
Location: CAMDEN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm downed several trees on a home and truck on Washington Street in Camden.

Thunderstorm Wind in SAGADAHOC, MAINE
From 11-SEP-13 21:05:00 to 11-SEP-13 21:10:00 (EST-5)
Location: BATH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm downed trees near Bath.

Thunderstorm Wind in CUMBERLAND, MAINE
From 11-SEP-13 21:35:00 to 11-SEP-13 21:39:00 (EST-5)
Location: FALMOUTH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees on Lambert Street in Portland.

Thunderstorm Wind in CUMBERLAND, MAINE
From 11-SEP-13 21:35:00 to 11-SEP-13 21:40:00 (EST-5)
Location: PEAKS IS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees on Island Avenue on Peaks Island.

Thunderstorm Wind in YORK, MAINE
From 11-SEP-13 21:20:00 to 11-SEP-13 21:24:00 (EST-5)
Location: KENNEBUNK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm downed large limbs near Kennebunk.

Thunderstorm Wind in CUMBERLAND, MAINE
From 11-SEP-13 21:25:00 to 11-SEP-13 21:29:00 (EST-5)
Location: WESTBROOK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed a large tree on Libby Avenue near Westbrook.

Thunderstorm Wind in YORK, MAINE
From 11-SEP-13 20:25:00 to 11-SEP-13 20:29:00 (EST-5)
Location: CORNISH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed large branches in Cornish.

Thunderstorm Wind in KNOX, MAINE
From 11-SEP-13 20:10:00 to 11-SEP-13 20:14:00 (EST-5)
Location: CAMDEN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm downed several large branches in Camden.

Thunderstorm Wind in KNOX, MAINE
From 11-SEP-13 20:00:00 to 11-SEP-13 20:04:00 (EST-5)
Location: HOPE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm downed a 100 foot by 200 foot section of trees on the east side of Alfond Lake in Hope.

Thunderstorm Wind in KNOX, MAINE
From 11-SEP-13 20:10:00 to 11-SEP-13 20:15:00 (EST-5)
Location: CAMDEN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm downed numerous large branches near Camden.

Thunderstorm Wind in CUMBERLAND, MAINE
From 11-SEP-13 21:41:00 to 11-SEP-13 21:45:00 (EST-5)
Location: CAPE ELIZABETH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced a measured gust of 62 mph and blew a fence down at Peabbles Cove near Cape Elizabeth.