Low pressure crossing southern Canada pushed a trailing cold front toward northern New England during the late afternoon and evening. Ahead of the front, thunderstorm activity quickly turned severe with numerous supercells producing damaging winds and large hail. These storms produced several tornadoes later in the evening across the border in southwest Maine.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 15:54:00 to 21-JUL-10 16:00:00 (EST-5)
Location: PIERMONT
Magnitude: 70.00 EG
Reported by: NWS Storm Survey

Winds from a severe thunderstorm downed numerous trees in the town of Orford.  The storm snapped or uprooted hundreds of trees and downed numerous power poles along a continuous path in the area.  Winds were estimated to have gusted between 80 and 90 mph.  The majority of damage was along Grimes Hill Road and Bean Brook Road.  In addition, large hail damaged corn crops along Route 10 and Grimes Hill Road in Orford.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 17:05:00 to 21-JUL-10 17:10:00 (EST-5)
Location: NORTH DORCHESTER
Magnitude: 70.00 EG
Reported by: NWS Storm Survey

Winds from a severe thunderstorm downed trees in the towns of Wentworth and Dorchester.  Dozens of trees were snapped or uprooted in a non-continuous path.  Winds were estimated to have gusted between 80 and 90 mph.  The majority of the damage occurred along Town Line Pond Road, Dorchester Road, Bickford Woods Road, Route 118, and North Groton Roads. In addition, one person was injured when a tree fell on a vehicle in Dorchester.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 15:48:00 to 21-JUL-10 15:51:00 (EST-5)
Location: LITTLETON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed multiple trees on Dells Road and Garys Drive in Littleton.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 17:19:00 to 21-JUL-10 17:23:00 (EST-5)
Location: GROTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm downed numerous trees closing several roads near Newfound Lake in North Hebron.

Thunderstorm Wind in CARROLL, NEW HAMPSHIRE
From 21-JUL-10 17:56:00 to 21-JUL-10 18:00:00 (EST-5)
Location: TUFTONBORO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees and wires on Middle Road in Tuftonboro.

Thunderstorm Wind in CARROLL, NEW HAMPSHIRE
From 21-JUL-10 18:14:00 to 21-JUL-10 18:17:00 (EST-5)
Location: WAKEFIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees on Lyford Road in Wakefield.

Thunderstorm Wind in STRAFFORD, NEW HAMPSHIRE
From 21-JUL-10 18:33:00 to 21-JUL-10 18:36:00 (EST-5)
Location: NEW DURHAM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees and wires on Kings Highway in New Durham.

Thunderstorm Wind in SULLIVAN, NEW HAMPSHIRE
From 21-JUL-10 19:35:00 to 21-JUL-10 19:38:00 (EST-5)
Location: NEWPORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed power lines on Cornish Turnpike and Sand Hill Road in Newport.

Hail in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 16:38:00 to 21-JUL-10 16:40:00 (EST-5)
Location: WEST THORNTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1 inch hail in North Thornton.

Hail in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 16:10:00 to 21-JUL-10 16:13:00 (EST-5)
Location: WARREN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1 inch hail near Claremont.

Hail in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 15:10:00 to 21-JUL-10 15:20:00 (EST-5)
Location: WARREN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1 inch hail for ten minutes in Warren.

Hail in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 17:35:00 to 21-JUL-10 17:38:00 (EST-5)
Location: HOLDERNESS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A thunderstorm produced .88 inch hail in Holderness.

Hail in BELKNAP, NEW HAMPSHIRE
From 21-JUL-10 20:20:00 to 21-JUL-10 20:23:00 (EST-5)
Location: BARNSTEAD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A thunderstorm produced .88 hail in Barnstead.

Thunderstorm Wind in SULLIVAN, NEW HAMPSHIRE
From 21-JUL-10 19:38:00 to 21-JUL-10 19:42:00 (EST-5)
Location: CHARLESTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees and wires on Route 12 in Charlestown.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 17:04:00 to 21-JUL-10 17:08:00 (EST-5)
Location: DORCHESTER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed multiple trees and wires on Route 118 in Dorchester.

Thunderstorm Wind in MERRIMACK, NEW HAMPSHIRE
From 21-JUL-10 20:15:00 to 21-JUL-10 20:18:00 (EST-5)
Location: LOUDON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed trees in Loudon.

Thunderstorm Wind in ROCKINGHAM, NEW HAMPSHIRE
From 21-JUL-10 20:52:00 to 21-JUL-10 20:55:00 (EST-5)
Location: BRENTWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed tree limbs in Brentwood.

Thunderstorm Wind in ROCKINGHAM, NEW HAMPSHIRE
From 21-JUL-10 20:59:00 to 21-JUL-10 21:03:00 (EST-5)
Location: PORTSMOUTH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Airplane Pilot

A severe thunderstorm downed trees in Portsmouth.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 16:52:00 to 21-JUL-10 16:57:00 (EST-5)
Location: LYME
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A microburst from a severe thunderstorm downed trees on Pinnacle Road near Skunk Hollow.

Hail in SULLIVAN, NEW HAMPSHIRE
From 21-JUL-10 19:29:00 to 21-JUL-10 19:33:00 (EST-5)
Location: CLAREMONT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced 1 inch hail near Claremont.

Hail in GRAFTON, NEW HAMPSHIRE
From 21-JUL-10 17:05:00 to 21-JUL-10 17:08:00 (EST-5)
Location: WENTWORTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1 inch hail in Wentworth.

Thunderstorm Wind in CARROLL, NEW HAMPSHIRE
From 21-JUL-10 17:14:00 to 21-JUL-10 17:18:00 (EST-5)
Location: SANDWICH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed trees on Vittum Hill Road in Sandwich.