Around 40 million people in the U.S. are under a winter storm warning from an unusual blast of severe winter weather.

Millions of people across the northern Gulf Coast braced Tuesday for a rare winter storm that's expected to scatter heavy snow, sleet and freezing rain around the Deep South as a blast of Arctic air plunges much of the eastern U.

A once-in-a-lifetime winter storm pummeled the South, all the way down to the Gulf Coast, with snow and ice. Here's the latest.