Special Weather Statement issued November 21 at 3:48PM EST by NWS

…Quickly Dropping Temperatures May Create Icy Roads Tonight… Temperatures have already begun to drop quickly across portions of Northern New York and Vermont as a potent cold front moves through the area. In addition, road temperatures have also begun to drop below freezing as the air temperature has cooled. This trend will continue eastward during the evening and overnight

Source: National Weather Service Alerts for Vermont