A strong, potent upper atmospheric system, as well as a developing surface low, raced across the Ohio River Valley during the afternoon of February 5th. This system intensified and moved rapidly across south central New York during the evening (994 mb at 7pm EST) and New England into the Gulf of Maine by early morning of the 6th (980 mb at 1am EST).
This quick-hit storm started around dusk and was largely finished by midnight with snowfall rates up to 3 inches per hour. A heavy wet snowfall (10:1 snow/water ratios) of 6 to 12 inches with localized higher amounts occurred. In addition to heavy wet snow mixed with sleet across northern New York, there were several reports of thunder-snow within the Champlain Valley.
Snow depths (and Snow water equivalents) after this storm were generally 18 to 30 inches (4 to 6 inches in the valleys with 36 inches or greater (6+ inches) across the higher terrain. This resulted in heavy snow loads and isolated structure failures of garages, barns and carports.

Winter Storm in EASTERN CLINTON, NEW YORK
From 05-FEB-11 17:00:00 to 06-FEB-11 02:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A heavy wet snow occurred with snowfall amounts of 8 to 12 inches, including 9 inches in Peru.

Winter Storm in WESTERN CLINTON, NEW YORK
From 05-FEB-11 17:00:00 to 06-FEB-11 02:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A heavy wet snow occurred with snowfall amounts of 8 to 12 inches, including 9 inches in Peru.

Winter Storm in EASTERN ESSEX, NEW YORK
From 05-FEB-11 16:00:00 to 06-FEB-11 01:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A heavy wet snow mixed with sleet and freezing rain at times with snowfall amounts of 6 to 10 inches observed, including 9 inches in Moriah and Lake Placid.

Winter Storm in WESTERN ESSEX, NEW YORK
From 05-FEB-11 16:00:00 to 06-FEB-11 01:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A heavy wet snow mixed with sleet and freezing rain at times with snowfall amounts of 6 to 10 inches observed, including 9 inches in Moriah and Lake Placid.

Winter Storm in NORTHERN FRANKLIN, NEW YORK
From 05-FEB-11 18:00:00 to 06-FEB-11 02:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A heavy wet snow occurred with snowfall amounts of 8 to 14 inches observed, including 14 inches in Duane and 10 inches in Malone. Carport/Barn collapsed due to weight of snow in Duane.

Winter Weather in NORTHERN ST. LAWRENCE, NEW YORK
From 05-FEB-11 18:00:00 to 06-FEB-11 01:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

A heavy wet snow occurred with 3 to 6 inches of accumulation.

Winter Storm in SOUTHERN FRANKLIN, NEW YORK
From 05-FEB-11 17:00:00 to 06-FEB-11 02:00:00 (EST-5)
Property damage: 20.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A heavy wet snow occurred with snowfall amounts of 8 to 14 inches observed, including 14 inches in Duane and 10 inches in Malone. Carport/Barn collapsed due to weight of snow in Duane.

Winter Storm in SOUTHEASTERN ST. LAWRENCE, NEW YORK
From 05-FEB-11 17:00:00 to 06-FEB-11 01:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A heavy wet snow occurred with snowfall amounts of 8 to 12 inches observed, including 13 inches in South Edwards, 10 inches in Potsdam and 9 inches in Gouverneur.

Winter Storm in SOUTHWESTERN ST. LAWRENCE, NEW YORK
From 05-FEB-11 17:00:00 to 06-FEB-11 01:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A heavy wet snow occurred with snowfall amounts of 8 to 12 inches observed, including 13 inches in South Edwards, 10 inches in Potsdam and 9 inches in Gouverneur.