请密切关注天气情况,做足保暖措施,防止冻伤。4 R: F( @% N9 h9 Y$ H; I
A 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. 6 N& H! v1 W3 B( H$ E+ I1 C: }6 [6 ?. f1 u
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.