An arctic front slowly moved from northwest to southeast across northern NY during the late evening of February 17th and overnight hours of February 18th, bringing much colder air. Meanwhile, a weak surface wave was traveling northeast along this boundary. The combination allowed for light rain to change to freezing rain and eventually sleet and snow through the morning hours of February 18th.
Ice accumulations were generally around a tenth (0.10) of an inch with sleet/snowfall totals of 4 to 8 inches that created hazardous travel.

Winter Weather in EASTERN ESSEX, NEW YORK
From 18-FEB-22 02:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rain changed to freezing rain and accumulated to a tenth of an inch or less, followed by 1/2 to 1 inch of sleet then snowfall accumulating 1-2 inches created hazardous driving conditions.

Winter Storm in NORTHERN ST. LAWRENCE, NEW YORK
From 17-FEB-22 20:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Combined snow and sleet accumulations of 4 to 8 inches were common along with a tenth of an inch of ice (freezing rain) accumulation. These conditions led to hazardous driving across the area.

Winter Storm in NORTHERN FRANKLIN, NEW YORK
From 17-FEB-22 20:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Combined snow and sleet accumulations of 4 to 8 inches were common along with a tenth of an inch of ice (freezing rain) accumulation. These conditions led to hazardous driving across the area.

Winter Weather in WESTERN CLINTON, NEW YORK
From 18-FEB-22 00:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rain changed to freezing rain and accumulated to a tenth of an inch or less, followed by 1/2 to 1 inch of sleet then snowfall accumulating 2-4 inches created hazardous driving conditions.

Winter Weather in SOUTHWESTERN ST. LAWRENCE, NEW YORK
From 18-FEB-22 00:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rain changed to freezing rain and accumulated to a tenth of an inch or less, followed by 1/2 to 1 inch of sleet then snowfall accumulating 2-4 inches created hazardous driving conditions.

Winter Weather in SOUTHERN FRANKLIN, NEW YORK
From 18-FEB-22 00:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rain changed to freezing rain and accumulated to a tenth of an inch or less, followed by 1/2 to 1 inch of sleet then snowfall accumulating 2-4 inches created hazardous driving conditions.

Winter Weather in SOUTHEASTERN ST. LAWRENCE, NEW YORK
From 18-FEB-22 00:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rain changed to freezing rain and accumulated to a tenth of an inch or less, followed by 1/2 to 1 inch of sleet then snowfall accumulating 2-4 inches created hazardous driving conditions.

Winter Weather in WESTERN ESSEX, NEW YORK
From 18-FEB-22 02:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rain changed to freezing rain and accumulated to a tenth of an inch or less, followed by 1/2 to 1 inch of sleet then snowfall accumulating 1-2 inches created hazardous driving conditions.

Winter Weather in EASTERN CLINTON, NEW YORK
From 18-FEB-22 02:00:00 to 18-FEB-22 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rain changed to freezing rain and accumulated to a tenth of an inch or less, followed by 1/2 to 1 inch of sleet then snowfall accumulating 1-2 inches created hazardous driving conditions.