本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 8 c" z5 [& `$ v: M3 C, |# Y; h$ L" j6 l
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., E; z z% ^: y4 Z
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. / F7 Y- }* T1 B1 x9 l