Dangerously cold weather will put much of the United States into a deep freeze over the weekend as temperatures are expected to plunge by up to 40 degrees behind an Arctic air mass.

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.

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.

NASHVILLE, Tenn. (WKRN) — Another bout of significant cold air will impact the region early next week. Temperatures will be 20-30 degrees below average, with the worst of the cold happening in the morning hours of Monday and Tuesday.

Weather forecasts next week are calling for an arctic freeze — literally, with a blast of below-zero arctic air hitting the state — raising safety concerns, especially for folks without homes, kids going to and from school,

An arctic blast will send temperatures across the United States plummeting as bitterly cold air that originated in Siberia will arrive from Canada by week’s end, bringing with it dangerously cold wind chills for millions of Americans.