A rapidly intensifying area of low pressure moved from the eastern Great Lakes across Quebec province Canada during the afternoon and evening hours of September 8th. A tight pressure gradient created strong surface southerly winds of 20 to 30 mph with frequent gusts in excess of 40 mph across the region. In addition these strong winds delivered an abnormally warm and unstable air mass ahead of the surface low and cold front. As the cold front moved across New York during the afternoon, a squall line of severe thunderstorms developed and pushed east across Northern New York.
There was isolated minor wind damage in the form of large tree branches or small trees prior to any thunderstorms. Wind damage associated with thunderstorms was more widespread and significant.

Thunderstorm Wind in FRANKLIN, NEW YORK
From 08-SEP-12 14:06:00 to 08-SEP-12 14:06:00 (EST-5)
Location: ST REGIS FALLS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A few trees downed by thunderstorm winds.

Thunderstorm Wind in CLINTON, NEW YORK
From 08-SEP-12 14:30:00 to 08-SEP-12 14:30:00 (EST-5)
Location: SARANAC
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wires and trees down at Picketts Corner Road and Route 3.

Thunderstorm Wind in ESSEX, NEW YORK
From 08-SEP-12 14:42:00 to 08-SEP-12 14:42:00 (EST-5)
Location: KEENE VLY
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few trees downed by thunderstorm winds.

Thunderstorm Wind in ST. LAWRENCE, NEW YORK
From 08-SEP-12 13:00:00 to 08-SEP-12 13:00:00 (EST-5)
Location: OGDENSBURG
Magnitude: 51.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large trees and power lines down as well as measured wind gust of 59 mph.

Thunderstorm Wind in ESSEX, NEW YORK
From 08-SEP-12 15:12:00 to 08-SEP-12 15:12:00 (EST-5)
Location: TICONDEROGA
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Several large limbs and a few tree tops toppled.

Thunderstorm Wind in ESSEX, NEW YORK
From 08-SEP-12 15:12:00 to 08-SEP-12 15:12:00 (EST-5)
Location: PORT HENRY
Magnitude: 60.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees and power lines down with some vehicle and light structural damage.

Thunderstorm Wind in CLINTON, NEW YORK
From 08-SEP-12 15:08:00 to 08-SEP-12 15:08:00 (EST-5)
Location: DANNEMORA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Scattered trees down.

Thunderstorm Wind in CLINTON, NEW YORK
From 08-SEP-12 15:12:00 to 08-SEP-12 15:12:00 (EST-5)
Location: CHAZY
Magnitude: 55.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees and power lines down.

Thunderstorm Wind in CLINTON, NEW YORK
From 08-SEP-12 15:15:00 to 08-SEP-12 15:15:00 (EST-5)
Location: VALCOUR
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and wires down at Ausable Point campground.

Thunderstorm Wind in CLINTON, NEW YORK
From 08-SEP-12 15:20:00 to 08-SEP-12 15:20:00 (EST-5)
Location: PLATTSBURGH
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Large branches and power pole down on Lake Breeze Drive.

Thunderstorm Wind in ESSEX, NEW YORK
From 08-SEP-12 15:10:00 to 08-SEP-12 15:10:00 (EST-5)
Location: PORT KENT
Magnitude: 60.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees and power lines down as well as road closures.

Thunderstorm Wind in ST. LAWRENCE, NEW YORK
From 08-SEP-12 13:15:00 to 08-SEP-12 13:15:00 (EST-5)
Location: POTSDAM
Magnitude: 60.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Temporary walls of School gymnasium, fences and port-o-potties were damaged or destroyed. Other tree damage was reported in several adjacent neighborhoods.

Thunderstorm Wind in CLINTON, NEW YORK
From 08-SEP-12 15:06:00 to 08-SEP-12 15:06:00 (EST-5)
Location: PERU
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees down throughout town, including Jeb Allen Road, Sullivan and Conner streets.

Thunderstorm Wind in ESSEX, NEW YORK
From 08-SEP-12 15:15:00 to 08-SEP-12 15:15:00 (EST-5)
Location: DOUGLASS
Magnitude: 55.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous trees down as well as utility lines.