that would break a more than 40-year record. and it would feel like 10 below zero this far south in the city of atlanta, wolf. that s cold for any place, especially someplace like atlanta. victor, thanks. some parts of the united states could see a 60-degree temperature drop today. alexandria steele is monitoring the situation for us from the severe weather center. explain what s causing all of this, alexandra? wolf, this is some rarified air. it s called the polar vortex, air that normally circulates around the globe. the northern north pole. so certainly the poles, not much farther south. but when the polar vortex gets weak, this kind of deep cold is allowed to drop into the northern hemisphere. and that s a piece of what we re feeling. so it s really the coldest air in the northern hemisphere, hasn t been in this part of the woods. if you re younger than 40, you ve never felt it before. so we re going to watch this drop south, east. it will modify some. but looking at these nu