本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 ( V( v% c8 q ]0 c O* L6 o* T
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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. $ L0 W7 I$ m, ?4 v9 F' zAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.* Q4 w) x+ N+ l" P! b. p