本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 ) z6 X. Y1 c, C1 J2 Y) M: O
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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.9 P2 z8 j# c5 n, V) R
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. 2 |8 d0 T" @) U0 M* C! u- B