本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 * f3 x$ ^! L" K/ F/ q4 r # f: z) L* B) a& q0 g" M0 F) AA 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. 7 S; w9 [( s" G k. a' M8 h) QAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. , ]7 S( H( {3 q: a& Q4 K0 a