本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 & X; M7 ^$ Y! ^0 S . y Q7 d9 |' QA 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. 4 L- D1 D- d6 m' |6 r# m4 cAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. * S) d- Q. i, H0 P+ x