本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 / s- X( G+ q) Y" a/ g5 f# W8 f: q( l8 K! e9 _: y
A 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.: v6 Y+ ^" J6 M, _
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.% n) l% U |" c8 F- n