An arctic air mass will channel temperatures 20-30 degrees below already historically cold January averages. The South braced for a rare winter storm.

Brutal cold and snowy roads to start the week, with temperatures barely reaching double digits during the day and falling below zero at night. Wind will make it feel like 10 to 15 degrees below zero at times Monday night and Tuesday morning,

Temperatures will hover in the single digits above and below zero across the Front Range and Eastern Plains, but overnight wind chills will make it feel as cold as minus 30.

The coldest weather of the winter is here and won’t relent until late this week. Highs may not escape the 20s until Friday; on Wednesday, they may not surpass the teens. While it’s cold, it’s dry. Significant snow is not in the forecast this week. By the weekend, temperatures will start to moderate some.

The 7 a.m. wind chill values were in the 30s and 40s below zero throughout Minnesota, including -35 in the Twin Cities. When you zoom out to see more of Minnesota and the entire region, it reveals the expansive area of Siberian air that has been spun south by a stretching polar vortex.