Strong low pressure moved from the Tennessee River Valley on the morning of December 26th to near Long Island, New York by the morning of December 27th, then eventually moved into Nova Scotia by the early morning hours of December 28th.
Snow began across portions of northern New York between 9 pm and Midnight of December 26th and fell heavily at times (snowfall rate of 1-2 inches per hour) through the morning hours of December 27th before eventually diminishing during the afternoon and evening hours.
Snowfall accumulations of 12 to 20 inches were common across much of northern New York. Thankfully, school vacation and holiday closures resulted in limited disruption, yet still yielded numerous vehicle accidents.

Winter Storm in NORTHERN ST. LAWRENCE, NEW YORK
From 26-DEC-12 22:00:00 to 27-DEC-12 15:00:00 (EST-5)
Property damage: 15.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 12 to 18 inches were common in St. Lawrence county, including 15 inches in Russell and 16 inches in Potsdam and Ogdensburg.

Winter Storm in SOUTHWESTERN ST. LAWRENCE, NEW YORK
From 26-DEC-12 21:00:00 to 27-DEC-12 15:00:00 (EST-5)
Property damage: 15.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 12 to 18 inches were common in St. Lawrence county, including 15 inches in Russell and 16 inches in Potsdam and Ogdensburg.

Winter Storm in SOUTHEASTERN ST. LAWRENCE, NEW YORK
From 26-DEC-12 21:00:00 to 27-DEC-12 15:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 12 to 18 inches were common in St. Lawrence county, including 15 inches in Russell and 16 inches in Potsdam and Ogdensburg.

Winter Storm in EASTERN CLINTON, NEW YORK
From 26-DEC-12 23:00:00 to 27-DEC-12 17:00:00 (EST-5)
Property damage: 20.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 10 to 18 inches were common in Clinton county with some specific totals included Champlain with 18 inches and Peru with 17 inches.

Winter Storm in EASTERN ESSEX, NEW YORK
From 26-DEC-12 22:00:00 to 27-DEC-12 16:00:00 (EST-5)
Property damage: 15.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 10 to 18 inches were common in Essex county with some specific totals included 17 inches in Lake Placid and 11 inches in Moriah.

Winter Storm in NORTHERN FRANKLIN, NEW YORK
From 26-DEC-12 23:00:00 to 27-DEC-12 16:00:00 (EST-5)
Property damage: 15.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 12 to 18 inches were common in Essex county with some specific totals included 17 inches in Westville, 13 inches in Malone and 12 inches in Tupper Lake.

Winter Storm in SOUTHERN FRANKLIN, NEW YORK
From 26-DEC-12 22:00:00 to 27-DEC-12 16:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 12 to 18 inches were common in Essex county with some specific totals included 17 inches in Westville, 13 inches in Malone and 12 inches in Tupper Lake.

Winter Storm in WESTERN CLINTON, NEW YORK
From 26-DEC-12 23:00:00 to 27-DEC-12 17:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 10 to 18 inches were common in Clinton county with some specific totals included Champlain with 18 inches and Peru with 17 inches.

Winter Storm in WESTERN ESSEX, NEW YORK
From 26-DEC-12 22:00:00 to 27-DEC-12 16:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall totals of 10 to 18 inches were common in Essex county with some specific totals included 17 inches in Lake Placid and 11 inches in Moriah.