本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 & |% Z. B7 {) e
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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. : p7 o; a# c- i3 F5 H" l5 l, ~At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. {3 f# U) c6 |$ s& _