4 O) q0 \2 n5 |2 nA 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.& _' ?# U( ?' y: U# S
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. : p, u8 }# R" i- y/ H! F# A