A potent shot of Arctic air starts settling in Monday as a massive dip in the jet stream pulls in frigid air across the entire eastern half of the country. Temperatures are set to drop as low as 20 degrees below average Tuesday and Wednesday with highs only reaching the teens, with lows in the single digits and even plunging below zero.

A large part of the U.S. is getting hit with another Arctic blast, adding to an already cold January 2025. Forecasters expect temperatures to drop below zero in several states, and to plunge to more than minus 30 in parts of the Dakotas, Minnesota and Wisconsin. More winter storms are expected alongside that cold polar air.

Temperatures will plummet by up to 40 degrees this weekend as an arctic blast spreads across much of the U.S., including the Deep South.