请密切关注天气情况,做足保暖措施,防止冻伤。" w; ~& B' n ^1 I) p" f, J
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. + x0 F0 ?- d+ [ 3 [' v9 V( J' p1 _+ U! vAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.