" u; b k( |1 ~& S( x4 Y, GA 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.$ _0 ^+ e% ^ Y+ g! k' p8 S' c
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. + t* y" x# D% h9 f( z