本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 6 l! Q! Q7 Z4 G- ` , G/ Q+ A( `0 u1 ^0 vA 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. / x: b+ _! ^$ T, G+ X) MAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.1 G. T7 e. s# r- M, E( B