Arctic high pressure moving from central Canada across the Great Lakes into the northeast on January 11th. Brisk northwest winds of 10 to 20 mph delivered sub-zero air temperatures, that combined created apparent temperatures (wind chill) in the 25 to 35 below zero range across the Adirondacks and along the Canadian border with  20 to 30 below zero elsewhere by daybreak on January 11th.
High temperatures on the 11th ranged from single numbers above and below zero with wind chills still in the teens below zero. Low temperatures during the early night of the 11th were sub-zero and began to rise overnight due to a south wind. However, brisk south winds of 15 to 25 mph actually created wind chills in the 10 to 20 below zero range.
Several to numerous school districts closed school and after school activities due to the cold and COVID related complications according to local media.

Cold/Wind Chill in EASTERN CLINTON, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 5 to 10 below zero with winds creating wind chills in the 15 to 25 below zero range. Daytime highs only reached the single numbers above zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 10 to 20 below zero range.

Extreme Cold/Wind Chill in NORTHERN FRANKLIN, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 10 to 20 below zero with winds creating wind chills in the mid 20s to lower 30s below zero range. Daytime highs only reached near zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 15 to 20 below zero range.

Cold/Wind Chill in EASTERN ESSEX, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 5 to 10 below zero with winds creating wind chills in the 15 to 25 below zero range. Daytime highs only reached the single numbers above zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 10 to 20 below zero range.

Extreme Cold/Wind Chill in NORTHERN ST. LAWRENCE, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 10 to 20 below zero with winds creating wind chills in the mid 20s to lower 30s below zero range. Daytime highs only reached near zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 15 to 20 below zero range.

Extreme Cold/Wind Chill in SOUTHEASTERN ST. LAWRENCE, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 10 to 20 below zero with winds creating wind chills in the mid 20s to lower 30s below zero range. Daytime highs only reached near zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 15 to 20 below zero range.

Extreme Cold/Wind Chill in SOUTHERN FRANKLIN, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 10 to 20 below zero with winds creating wind chills in the mid 20s to lower 30s below zero range. Daytime highs only reached near zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 15 to 20 below zero range.

Extreme Cold/Wind Chill in SOUTHWESTERN ST. LAWRENCE, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 10 to 20 below zero with winds creating wind chills in the mid 20s to lower 30s below zero range. Daytime highs only reached near zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 15 to 20 below zero range.

Extreme Cold/Wind Chill in WESTERN CLINTON, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 10 to 20 below zero with winds creating wind chills in the mid 20s to lower 30s below zero range. Daytime highs only reached near zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 15 to 20 below zero range.

Extreme Cold/Wind Chill in WESTERN ESSEX, NEW YORK
From 11-JAN-22 00:00:00 to 12-JAN-22 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minimum temperatures on the morning of the 11th (Tuesday) were in the 10 to 20 below zero with winds creating wind chills in the mid 20s to lower 30s below zero range. Daytime highs only reached near zero with still sub-zero wind chills. Lows Tuesday night fell below zero early then rose overnight but combined with south winds of 10 to 20 mph still created wind chills in the 15 to 20 below zero range.