The winter storm could impact up to 170 million people across more than 20 states from the southern Plains to the Midwest and East, AccuWeather said.

A dangerous line of severe thunderstorms continues to move east after causing damage across parts of Texas and Oklahoma. FOX Weather Meteorologist Bob Van Dillen explains the tornado threat for Louisiana,

A strong storm system will be moving across the Mississippi Valley through the afternoon and we will have the chance of severe weather as the line of storms moves in with it. We currently have a tornado watch for the entire area of southern Louisiana and Mississippi until 7 p.