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.

Snowy weather will roll into Oklahoma on Thursday. Here is the timeline of when to expect snow, sleet and a return to seasonal temperatures.

Brutal cold will open the door for a winter storm to take a somewhat unusual track through the South and create treacherous conditions.