A cold front slowly sagging south through northern New England was the focus for showers and thunderstorms. An associated shortwave provided significant directional and speed shear for the development of some super cells as the front slowly pushed south during the evening hours of July 17th. Wind damage was the main result of these storms as several bowing line segments moved through northern and central New Hampshire.  A small waterspout touched down on Newfound Lake near Bridgewater.

Thunderstorm Wind in CARROLL, NEW HAMPSHIRE
From 17-JUL-12 17:45:00 to 17-JUL-12 17:49:00 (EST-5)
Location: MOULTONBORO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees and wires in Moultonboro.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 18:25:00 to 17-JUL-12 18:31:00 (EST-5)
Location: CENTER BARNSTEAD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed trees in Center Barnstead.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 18:15:00 to 17-JUL-12 18:20:00 (EST-5)
Location: LOWER GILMANTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed numerous trees and damaged a garage near Crystal Lake in the Gilmanton Iron Works.

Thunderstorm Wind in MERRIMACK, NEW HAMPSHIRE
From 17-JUL-12 18:38:00 to 17-JUL-12 18:44:00 (EST-5)
Location: HOPKINTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm produced a microburst downing numerous trees in Hopkinton.

Thunderstorm Wind in STRAFFORD, NEW HAMPSHIRE
From 17-JUL-12 18:45:00 to 17-JUL-12 18:48:00 (EST-5)
Location: ROCHESTER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm downed large tree branches and wires in Rochester.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 17-JUL-12 23:00:00 to 17-JUL-12 23:05:00 (EST-5)
Location: LYME
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed several trees on Orfordville Road near Lyme.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 17-JUL-12 23:20:00 to 17-JUL-12 23:20:00 (EST-5)
Location: GRAFTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed trees on Prescott Hill Road in Grafton.

Tornado in GRAFTON, NEW HAMPSHIRE
From 17-JUL-12 17:15:00 to 17-JUL-12 17:20:00 (EST-5)
Location: BRIDGEWATER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A small waterspout touched down on Newfound Lake near Bridgewater.  A vacationer snapped a couple pictures of the waterspout.  No damage was reported.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 17-JUL-12 16:27:00 to 17-JUL-12 16:32:00 (EST-5)
Location: FRANCONIA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A severe thunderstorm downed large branches near Franconia.

Hail in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 17:55:00 to 17-JUL-12 17:59:00 (EST-5)
Location: LACONIA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A thunderstorm produced 0.75 inch hail in Laconia.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 17-JUL-12 17:28:00 to 17-JUL-12 17:34:00 (EST-5)
Location: HANOVER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed numerous trees throughout Hanover.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 17-JUL-12 17:30:00 to 17-JUL-12 17:35:00 (EST-5)
Location: LEBANON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed numerous trees in Lebanon.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 17-JUL-12 17:25:00 to 17-JUL-12 17:29:00 (EST-5)
Location: LYME
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed several 12 to 18 inch diameter trees in Lyme.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 17:51:00 to 17-JUL-12 17:55:00 (EST-5)
Location: TILTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed large branches in Tilton.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 18:33:00 to 17-JUL-12 18:38:00 (EST-5)
Location: CENTER HARBOR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced estimated wind gusts of 60 mph near Meredith.

Thunderstorm Wind in MERRIMACK, NEW HAMPSHIRE
From 17-JUL-12 17:50:00 to 17-JUL-12 17:55:00 (EST-5)
Location: FRANKLIN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm downed large branches and trees in Franklin.

Thunderstorm Wind in MERRIMACK, NEW HAMPSHIRE
From 17-JUL-12 17:45:00 to 17-JUL-12 17:50:00 (EST-5)
Location: DANBURY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed a tree across a road in Danbury.

Thunderstorm Wind in MERRIMACK, NEW HAMPSHIRE
From 17-JUL-12 17:51:00 to 17-JUL-12 17:54:00 (EST-5)
Location: HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed a tree on Murray Hill Road in Hill.

Thunderstorm Wind in MERRIMACK, NEW HAMPSHIRE
From 17-JUL-12 17:53:00 to 17-JUL-12 17:56:00 (EST-5)
Location: ANDOVER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed a tree on a house in Andover.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 17:55:00 to 17-JUL-12 17:59:00 (EST-5)
Location: SANBORNTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees and wires in Sanbornton.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 18:00:00 to 17-JUL-12 18:06:00 (EST-5)
Location: TILTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees and wires in Tilton.

Thunderstorm Wind in MERRIMACK, NEW HAMPSHIRE
From 17-JUL-12 18:00:00 to 17-JUL-12 18:05:00 (EST-5)
Location: FRANKLIN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm produced several reports of trees down in Franklin.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 18:04:00 to 17-JUL-12 18:07:00 (EST-5)
Location: LACONIA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed numerous trees in Laconia.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 18:05:00 to 17-JUL-12 18:10:00 (EST-5)
Location: BELMONT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed numerous trees in Belmont.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 18:20:00 to 17-JUL-12 18:24:00 (EST-5)
Location: ALTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees on Route 140 in Alton.

Thunderstorm Wind in BELKNAP, NEW HAMPSHIRE
From 17-JUL-12 18:25:00 to 17-JUL-12 18:28:00 (EST-5)
Location: BARNSTEAD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed a tree on Province Road in Barnstead.