A very strong shortwave and associated cold front were approaching from the west on the morning of July 1st. Ahead of the front, a very warm and moist air mass was in place over New England with values of precipitable water around 2 inches. Strong directional and speed shear contributed to numerous supercells that produced damaging winds, large hail, and 5 confirmed tornadoes across the border in Maine. In addition, very heavy rain associated with these cells produced extensive flash flooding to many area roads, with damage totaling in the millions.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 01-JUL-17 14:40:00 to 01-JUL-17 14:45:00 (EST-5)
Location: SUGAR HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees on wires in Sugar Hill.

Thunderstorm Wind in CARROLL, NEW HAMPSHIRE
From 01-JUL-17 16:30:00 to 01-JUL-17 16:34:00 (EST-5)
Location: CHATHAM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm downed trees in Chatham.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 01-JUL-17 15:35:00 to 01-JUL-17 15:40:00 (EST-5)
Location: WENTWORTH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm downed trees and wires in Wentworth.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 01-JUL-17 16:45:00 to 01-JUL-17 16:50:00 (EST-5)
Location: BRIDGEWATER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm downed trees and wires near Mayhew Turnpike in Bridgewater.

Thunderstorm Wind in CARROLL, NEW HAMPSHIRE
From 01-JUL-17 15:10:00 to 01-JUL-17 15:16:00 (EST-5)
Location: CENTER CONWAY
Magnitude: 74.00 EG
Crop damage: 0.00K
Reported by: NWS Storm Survey

A severe thunderstorm snapped or uprooted dozens of trees along the north shore of Conway Lake.

Thunderstorm Wind in CARROLL, NEW HAMPSHIRE
From 01-JUL-17 15:13:00 to 01-JUL-17 15:18:00 (EST-5)
Location: CONWAY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm downed trees and wires in East Conway.

Thunderstorm Wind in CARROLL, NEW HAMPSHIRE
From 01-JUL-17 16:20:00 to 01-JUL-17 16:24:00 (EST-5)
Location: BARTLETT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm downed trees in Bartlett.

Thunderstorm Wind in SULLIVAN, NEW HAMPSHIRE
From 01-JUL-17 18:50:00 to 01-JUL-17 18:55:00 (EST-5)
Location: PLAINFIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm downed trees and wires on Route 120, Black Hill Road and Route 12A in Plainfield.

Hail in CARROLL, NEW HAMPSHIRE
From 01-JUL-17 13:05:00 to 01-JUL-17 13:09:00 (EST-5)
Location: CENTER CONWAY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced 1.75 inch hail near Center Conway.

Thunderstorm Wind in GRAFTON, NEW HAMPSHIRE
From 01-JUL-17 16:25:00 to 01-JUL-17 16:30:00 (EST-5)
Location: LEBANON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm downed large branches in Lebanon.

Funnel Cloud in GRAFTON, NEW HAMPSHIRE
From 01-JUL-17 12:44:00 to 01-JUL-17 12:53:00 (EST-5)
Location: CAMPTON HOLLOW
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm produced a funnel cloud near Campton, as reported by a trained spotter.