Bitter Arctic air plunged more than half the United States into a deep freeze Tuesday, including New Orleans, where the heaviest snow in decades brought dangerous conditions to the famously festive Gulf Coast city.

A rare winter storm churned across the U.S. Gulf Coast on Tuesday, breaking snowfall records more than a century old in a southern region where flurries are unusual, as much of the United States remained in a dangerous deep freeze.

That's wild considering it hasn't snowed in New Orleans since 2009, and their last "big" snowstorm was in 2008 when 1-2 inches fell. Up to five inches of snow could accumulate in the Houston area. The all-time record snowfall in Houston is 3.0 inches, so this is very clearly a historic situation.