本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 " H: E- L7 G& {$ I
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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 k5 A+ s& f# b; X7 u
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.! ^2 {7 r3 e; E/ O8 ]