From New England to Texas, weather forecasters warn it's going to be 20 degrees to 40 degrees colder than usual over New Year's. The expected low will be 11 degrees, with a windchill of zero. And those numbers pale compared to what Minneapolis and Chicago might put on the board on New Year's Eve. Minneapolis is expected to log a low of -13, while the forecast for Chicago is for wind-chill temperatures down to 15 below. The weather triggered a snow emergency in northwestern Pennsylvania, where 21 National Guard troops were placed on active duty.

Source: CNN December 28, 2017 20:54 UTC