本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 + V0 q) L3 S/ T) _0 L
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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.. ^5 e% U6 N. P' J" C
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.# z& s2 s1 X# S8 J