* Locations... Livingston, Ontario and Allegany counties.
* Timing... from late Friday night through late Sunday morning.
* Winds... northwest 15 to 25 mph with gusts up to 35 mph.
* Wind chill values... as low as 30 below.
* Impacts... wind chills will reach dangerous levels. Frigid temperatures have the potential to result in frozen pipes, frostbite and hypothermia.
* Forecaster confidence... high.