"A dangerous cold-air outbreak will reach the Midwest and Great Lakes on Tuesday and is expected to last multiple days with the potential to break dozens of records. By the end of the week, more than 87 million people in those regions will experience temperatures at or below zero degrees and wind chills far colder.
A portion of the polar vortex, the pool of subfreezing air that normally swirls over the Arctic Circle, dives into the Midwest this week, pushing temperatures off a cliff. The most intense cold will last from Tuesday night through Thursday across a broad region from North Dakota south into Missouri and as far east as Upstate New York. Temperatures are forecast to run as much as 50 degrees below average for late January." WP
https://www.washingtonpost.com/weath...=.473c9c3a34f8
Take care.