本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 + E& `# [! t- H% M. G9 Q' a
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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. 0 [' W3 j* w6 ^2 C |0 ]At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. / d6 J! g/ Q; \; [- A1 u' V, j$ U