A cold front with a pre-frontal trough moved through the forecast area during the afternoon and early evening of July 4th. Ahead of this boundary was very unstable air with high surface dew points and large CAPE values of 2000-2500 J/kg. Wind flow was relatively weak with limited wind shear. These storms produced many reports of wind damage and large hail.

Hail in SOMERSET, MAINE
From 04-JUL-11 13:30:00 to 04-JUL-11 13:34:00 (EST-5)
Location: CAMBRIDGE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1.75  inch hail near the general store in Cambridge.

Hail in SOMERSET, MAINE
From 04-JUL-11 13:40:00 to 04-JUL-11 13:43:00 (EST-5)
Location: NORRIDGEWOCK ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1 inch hail on Winding Hill Road near Norridgewock.

Hail in SOMERSET, MAINE
From 04-JUL-11 14:03:00 to 04-JUL-11 14:07:00 (EST-5)
Location: RIPLEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1.75 inch hail at Ellms Road and the Main Street intersection in Ripley.

Hail in CUMBERLAND, MAINE
From 04-JUL-11 14:05:00 to 04-JUL-11 14:08:00 (EST-5)
Location: RAYMOND
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1.25 inch hail in Raymond.

Hail in CUMBERLAND, MAINE
From 04-JUL-11 14:20:00 to 04-JUL-11 14:23:00 (EST-5)
Location: NORTH WINDHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1 inch hail in North Windham.

Hail in CUMBERLAND, MAINE
From 04-JUL-11 14:30:00 to 04-JUL-11 14:34:00 (EST-5)
Location: WEST CUMBERLAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm produced 0.75 inch hail near West Cumberland.

Hail in CUMBERLAND, MAINE
From 04-JUL-11 14:50:00 to 04-JUL-11 14:53:00 (EST-5)
Location: WESTBROOK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A thunderstorm produced 0.75 inch hail in Westbrook.

Thunderstorm Wind in CUMBERLAND, MAINE
From 04-JUL-11 13:35:00 to 04-JUL-11 13:39:00 (EST-5)
Location: HARRISON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed trees in Harrison.

Thunderstorm Wind in CUMBERLAND, MAINE
From 04-JUL-11 14:40:00 to 04-JUL-11 14:44:00 (EST-5)
Location: WINDHAM HILL
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed a large oak on cars near Windham.

Thunderstorm Wind in CUMBERLAND, MAINE
From 04-JUL-11 14:40:00 to 04-JUL-11 14:43:00 (EST-5)
Location: NORTH WINDHAM
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed a large oak on cars near North Windham.

Thunderstorm Wind in CUMBERLAND, MAINE
From 04-JUL-11 14:40:00 to 04-JUL-11 14:43:00 (EST-5)
Location: NORTH WINDHAM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed large pines on power lines near North Windham.

Thunderstorm Wind in CUMBERLAND, MAINE
From 04-JUL-11 15:10:00 to 04-JUL-11 15:14:00 (EST-5)
Location: NORTH SCARBOROUGH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed wires and trees in the vicinity of Route 114 and Running Hill Road near Westbrook.

Thunderstorm Wind in CUMBERLAND, MAINE
From 04-JUL-11 15:21:00 to 04-JUL-11 15:24:00 (EST-5)
Location: SCARBOROUGH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees on Route 114 and Saco Street in Scarborough.

Thunderstorm Wind in CUMBERLAND, MAINE
From 04-JUL-11 15:25:00 to 04-JUL-11 15:30:00 (EST-5)
Location: NORTH SCARBOROUGH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed trees near Holmes Road and Den Drive in North Scarborough.

Thunderstorm Wind in CUMBERLAND, MAINE
From 04-JUL-11 15:25:00 to 04-JUL-11 15:28:00 (EST-5)
Location: WEST SCARBOROUGH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed large limbs on power lines off Broadturn Road in Scarborough.

Thunderstorm Wind in YORK, MAINE
From 04-JUL-11 15:30:00 to 04-JUL-11 15:33:00 (EST-5)
Location: OGUNQUIT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees in Ogunquit.

Thunderstorm Wind in SOMERSET, MAINE
From 04-JUL-11 14:15:00 to 04-JUL-11 14:18:00 (EST-5)
Location: SMITHFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A thunderstorm with an estimated wind gust of 60 mph produced minor tree damage and small hail in Smithfield.

Thunderstorm Wind in KENNEBEC, MAINE
From 04-JUL-11 14:29:00 to 04-JUL-11 14:33:00 (EST-5)
Location: OAKLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced estimated gusts of 50 to 60 mph, taking down numerous large branches and dropping 0.75 inch hail in Oakland.

Hail in SOMERSET, MAINE
From 04-JUL-11 12:25:00 to 04-JUL-11 12:28:00 (EST-5)
Location: CARATUNK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1 inch hail near Caratunk.