* WHAT...Very cold temperatures from 40 below to 50 below and wind chills as low as 60 below. * WHERE...Copper River Basin. * WHEN...Until 1 PM AKST Wednesday. * IMPACTS...The dangerously cold wind chills as low as 60 below zero could cause frostbite on exposed skin in as little as 5 minutes. Frostbite and hypothermia are likely if exposed to these temperatures. Wind chill values can lead to hypothermia with prolonged exposure. Very cold temperatures can lead to hypothermia with prolonged exposure.