6 I, M- k, N1 n" w/ |3 UA very cold Arctic airmass and winds of 15 to 20 km/h will generate wind chill values below minus 40 across much of Alberta tonight. Conditions will improve somewhat by Sunday afternoon as temperatures rise. ) p: p( G0 v& lAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. : X% u- C: j ] @2 }9 `