今晚和明晨要出门的朋友请注意Wind chill warning in effect.

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请密切关注天气情况，做足保暖措施，防止冻伤。
. E3 F1 q0 D; l8 M6 c! K* JA 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.

" [0 P  d. q, o6 d9 g/ G: GAt these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.

DELTA