( S3 A$ v+ K' I# CA 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 R' O% e) y# M% x$ R
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. t9 d9 L4 H- N+ k3 p