Preparations are underway as an arctic blast dives into the nation's interior and southern regions and pushes a snowstorm into the Mid-Atlantic and Northeast that will be followed by lethal cold.

A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans. See maps of the arctic blast.

Even the Mississippi Coast will take a hit. Biloxi is expected to experience several nights with lows at or below freezing. That may not sound very impressive compared to Oxford's predicted 13 degrees, but down on the Coast, that's chilly, y'all.

Several Florida counties could see "show showers" next week as another an Arctic blast combines with moisture to make snow a possibility.

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.

Snow and winds are likely to disrupt traffic, trigger flight cancellations, and cause headaches for people traveling to D.C. for Inauguration Day. Baby, it’s cold outside, and it’s about to get even colder for much of the United States.

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into next week, impacting millions of Americans in nearly all of the contiguous states.

A major cold blast is in store for millions of Americans as a lobe of a polar vortex will bring brutally cold temperatures to nearly every American east of the Rockies.