本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 t4 X4 S4 x _+ T; B( u ; C Z8 o; k1 c: y3 Y2 XA 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., R- x! I* H9 q; \& D
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. - B" f" K: f# S' c, N; ~