So there's a storm blowing in southern Alberta tonight at right now it's -43C with the wind (that's around -45F for the imperial folk). So cold your boogers freeze when you go outside.

From the environment Canada web page...

"An intense low pressure system developing over Montana will interact with a strong winds behind a cold front currently moving southwards through southern Alberta to generate blizzard conditions beginning this evening"..."Brisk winds will continue to be from the north at 20 to 30 km/h. The very cold temperatures combined with the wind will produce extreme wind chill values below minus 40 tonight into Monday morning. High risk of frostbite. Exposed skin can freeze in 5 to 10 minutes or sooner depending on wind speed."