5 Q4 B+ Y; A) h1 yA 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.2 t9 Y% |$ \+ l6 N5 A
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. ) ?9 [* @3 e' P$ S