本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 , `# r* @: d6 W- p' k( Y, j6 R
4 @- u' C/ Q6 tA 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. : l- c5 b& |" w- N# |At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. 6 D5 @/ }5 M+ I