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.

Central Indiana once again had highs around 40° on Saturday. However, this was early, around 12-1 a.m., before a cold front passed through. Temperatures slowly fell with afternoon highs only in

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary between Arctic and more temperate air – dips deeply southward, bringing the cold Arctic air to regions that don’t often experience it.

The 10 Weather Impact team issued Alert Days for next week because of the polar vortex being responsible for the cold temperatures.

Dangerous temperatures are sweeping the country, with 100 million people from the Plains to the Northeast feeling the chill. Even those in the South will see some effects. Several cities have already declared weather emergencies,

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.

A new blast of Arctic air sweeping from north to south will bring bone-chilling temperatures to millions of Americans this weekend and next week.

A Democratic lawmaker warned people who bought hotel rooms and flights ahead of President-elect Donald Trump's inauguration to get their money back as "most tickets will only be souvenirs" at this point.

Mid-sixties for your high temperatures throughout the weekend while the eastern part of the U.S. deals with a deep freeze.

Another blast of winter weather is expected in parts of the U.S. in the coming days, including bone-chilling wind in the Northern Plains and unusual snow and ice in the Gulf