A weak surface low across the Great Lakes on January 8th received upper atmospheric support (strong shortwave) during the night of the 8th and developed into a significant winter storm off the NH/ME coast by the morning of January 9th as it slowly moved into Newfoundland by January 10th.
Precipitation started as light rain, freezing rain and snow across northern NY during the evening of January 8th, changing to accumulating snow after midnight of January 9th. Snowfall was largely confined to mountain communities by midday of January 9th and continued until ending by late afternoon of January 10th.
Snowfall amounts varied greatly (3-12+ inches) with the highest amounts along the west-northwest facing higher elevation communities of the Adirondacks in northern New York.

Winter Storm in WESTERN CLINTON, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 12:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and upslope dependent snowfall occurred. Snowfall totals ranged from 4 to 18 inches, including 16 inches in Jericho and 4 inches in Plattsburgh.

Winter Storm in NORTHERN FRANKLIN, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 12:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and upslope dependent snowfall occurred. Snowfall totals ranged from 8 to 16 inches, including 13 inches in Duane Center, 10 inches in Malone and 8 inches in Saranac Lake.

Winter Weather in WESTERN ESSEX, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 08:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and up slope dependent snowfall occurred. Snowfall totals ranged from 4 to 12 inches in the Adirondacks and 3 to 5 inches in the Champlain Valley.

Winter Weather in EASTERN CLINTON, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 05:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and upslope dependent snowfall occurred. Snowfall totals ranged from 4 to 18 inches, including 16 inches in Jericho and 4 inches in Plattsburgh.

Winter Storm in SOUTHERN FRANKLIN, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 12:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and upslope dependent snowfall occurred. Snowfall totals ranged from 8 to 16 inches, including 13 inches in Duane Center, 10 inches in Malone and 8 inches in Saranac Lake.

Winter Storm in SOUTHEASTERN ST. LAWRENCE, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 12:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and upslope dependent snowfall occurred. Snowfall totals ranged from 4 to 18 inches with 4 to 6 inches in the St. Lawrence Valley and 10 to 18 inches in the Adirondacks.

Winter Weather in SOUTHWESTERN ST. LAWRENCE, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 00:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and upslope dependent snowfall occurred. Snowfall totals ranged from 4 to 18 inches with 4 to 6 inches in the St. Lawrence Valley and 10 to 18 inches in the Adirondacks.

Winter Weather in EASTERN ESSEX, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 00:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and up slope dependent snowfall occurred. Snowfall totals ranged from 4 to 12 inches in the Adirondacks and 3 to 5 inches in the Champlain Valley.

Winter Weather in NORTHERN ST. LAWRENCE, NEW YORK
From 08-JAN-19 17:00:00 to 10-JAN-19 05:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A long duration, elevation and upslope dependent snowfall occurred. Snowfall totals ranged from 4 to 18 inches with 4 to 6 inches in the St. Lawrence Valley and 10 to 18 inches in the Adirondacks.