An inverted trough set up over the region with rich low level moisture in place. This provided the focus for strong afternoon convection beginning to the southwest of the forecast area and moving northeast along the boundary into New Hampshire. The storms trained repeatedly along the boundary from northern Grafton to southern Coos. The storms commonly exhibited rotation with strong updrafts. There were several reports of large hail and in two cases it was covering the ground. Flash flood warnings were issued due to the training and long-lived nature of the storms. Some areas received between 2-4 inches of rain and in some cases more.

Hail in COOS, NEW HAMPSHIRE
From 26-MAY-11 19:00:00 to 26-MAY-11 19:04:00 (EST-5)
Location: LANCASTER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm produced 1.25 inch hail in Lancaster.

Hail in COOS, NEW HAMPSHIRE
From 26-MAY-11 19:15:00 to 26-MAY-11 19:19:00 (EST-5)
Location: DALTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm produced 1 inch hail in Dalton.

Hail in COOS, NEW HAMPSHIRE
From 26-MAY-11 19:30:00 to 26-MAY-11 19:33:00 (EST-5)
Location: LANCASTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A severe thunderstorm produced 1 inch hail in Lancaster.

Hail in COOS, NEW HAMPSHIRE
From 26-MAY-11 19:40:00 to 26-MAY-11 19:43:00 (EST-5)
Location: LANCASTER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm produced 1.5 inch hail in Lancaster.

Hail in GRAFTON, NEW HAMPSHIRE
From 26-MAY-11 20:40:00 to 26-MAY-11 20:44:00 (EST-5)
Location: LISBON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm produced 1 inch hail in Lisbon.

Hail in COOS, NEW HAMPSHIRE
From 26-MAY-11 19:49:00 to 26-MAY-11 19:51:00 (EST-5)
Location: LANCASTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A severe thunderstorm produced 1 inch hail in Lancaster.

Hail in GRAFTON, NEW HAMPSHIRE
From 26-MAY-11 20:00:00 to 26-MAY-11 20:03:00 (EST-5)
Location: LISBON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm produced 1 inch hail in Lisbon.

Hail in GRAFTON, NEW HAMPSHIRE
From 26-MAY-11 20:40:00 to 26-MAY-11 20:44:00 (EST-5)
Location: LISBON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm produced 1 inch hail for 15 minutes in Stark.

Thunderstorm Wind in COOS, NEW HAMPSHIRE
From 26-MAY-11 18:15:00 to 26-MAY-11 18:19:00 (EST-5)
Location: COLEBROOK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed trees in Colebrook.

Thunderstorm Wind in COOS, NEW HAMPSHIRE
From 26-MAY-11 18:45:00 to 26-MAY-11 18:48:00 (EST-5)
Location: PITTSBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed multiple trees in Pittsburg.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 26-MAY-11 23:45:00 to 26-MAY-11 23:48:00 (EST-5)
Location: LEBANON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed large limbs near Meridan Road and Route 120 near Lebanon.

Thunderstorm Wind in COOS, NEW HAMPSHIRE
From 26-MAY-11 19:50:00 to 26-MAY-11 19:54:00 (EST-5)
Location: STARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm downed trees in Stark.