- L1 Z" S! t8 Y1 g" M$ RA 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.) ]# Z6 h5 z; N3 c( r! ^
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. 7 B# V4 ?5 e. w6 V