Another major winter storm is expected to slam portions of the central and eastern U.S. this week, with heavy snow and strong winds threatening to induce dangerous travel conditions, knock out power and ground flights, forecasters warned.

Much of Arkansas has been upgraded to a winter storm warning for Thursday and Friday as meteorologists get a clearer picture about the type and location of winter weather much of the state will receive.

A developing winter storm threatens to drop snow, sleet and freezing rain on parts of Texas, Oklahoma and Arkansas as frigid air that escaped the Arctic plunges temperatures to subfreezing levels in some of the southernmost points of the U.