本帖最后由 qfweiwei 于 2014-3-1 22:08 编辑 / g" Z3 d# y6 t: C2 Q' O7 M 6 }5 o5 F# x% a8 H6 LA 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. ; |$ D! {' ]6 ^ H N* iAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes. 6 P, M4 C% f( R