本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 , f$ D+ X" _* H( m1 d3 K* K9 o2 f( u. U0 o3 L2 t
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.2 l) J( O% J2 L) |& A( X# U
At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.- y7 y! [& L! K0 M