On Thursday at 12:15 p.m. an extreme cold warning was released by the National Weather Service valid from 7 p.m. until Friday 10 a.m. for Oneida County. "Dangerously cold wind chills as low as 30 degrees below expected," explains the weather service. Understanding cold weather alertsExtreme cold warning: Take Action! An extreme cold warning is issued when dangerously cold air temperatures or wind chill values are expected or occurring. A cold weather advisory is issued when seasonably cold air temperatures or wind chill values, but not extremely cold values, are expected or occurring.