Parts of the Upper Midwest and Northern Plains are already feeling the effects of air spilling in from Canada. On Thursday, December 4, wind chills are expected to plunge between minus 10 and minus 25 degrees.


Parts of the Upper Midwest and Northern Plains are already feeling the effects of air spilling in from Canada. On Thursday, December 4, wind chills are expected to plunge between minus 10 and minus 25 degrees.