本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 ! A4 z% J4 x' C# n, Y2 o
" T" _0 v1 V# Z( z2 X2 a& oA 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.6 x+ U6 }/ Y" f6 G
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. 1 b3 V2 g* h6 U