polar vortex

That's what they're calling the wave of cold air that is to descend on us.  We are in for temperatures that could go as low as -70 with the wind chill.  Schools in Minnesota are closed on Monday thanks to Governor Dayton.  With these extreme temps, it is critically important that if you need to go outside, you go prepared.  It only takes a few minutes for frostbite to set in.  Any exposed skin is in danger.  polar vortex