An arctic air mass sprawling across the eastern, central and parts of the western U.S. on Monday will channel temperatures 20-30 degrees below already historically cold January averages and was poised to slam parts of the South with a disruptive winter storm.

Good Monday Morning! The cold Arctic air is finally here and you are starting the day with widespread 20 degree temperatures and wind chills already feeling more like the teens. The cold will not be going anywhere at least for this week and with an approaching gulf storm on the way

Meteorologist Devon Lucie starts with the dangerous cold tonight and Monday, then breaks down the snowstorm Tuesday walking you through what the different computer forecasts are showing for timing and precip types,