本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 1 J n- U& m# l- [3 d : [( w* m4 j* e( }9 r3 rA 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. 1 @5 h9 m8 m4 z t+ sAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.$ A- G9 H" {4 O1 v( H, }6 f& h