For example, Lake Charles, La., along the Gulf Coast, showed snowfall rates of over 1 inch per hour this morning and early afternoon and visibility down to a quarter of a mile with blowing snow. This is one of the reasons why blizzard warnings were posted briefly for that region earlier.

Millions of Americans across the South are bracing for a rare and potentially dangerous winter storm threatening to bring snow, sleet, ice and rain from Texas to the Carolinas. CBS News reporter Kati Weis has more from New Orleans and CBS News meteorologist Grant Gilmore has a look at the forecast.