本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 4 k( A: a7 {3 F u9 x+ i i4 ^& L8 v
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.# J* z2 \2 h0 i8 A8 ]! [( A
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.) Q" l3 H, s( C, ?