The snow lingers on Friday after a winter storm hit Oklahoma on Thursday, leaving behind snow-covered, slushy and slick roads.

Another massive winter storm is forecast to pummel the southern and eastern U.S., with impacts from Texas to the Carolinas.

Though driving in the snow should be avoided if at all possible, here's what to know when there's no other choice.

Sleet is different from freezing rain, occurring when snowflakes partially melt as they descend through a shallow layer of ...