A winter storm packing heavy snow, sleet and freezing rain is on track for the U.S. South and Southeast where roads may become impassable and power outages are possible starting on Friday and into the weekend, forecasters said. A large swath of the United States, from Louisiana northeast through the Appalachian Mountains and into southern Pennsylvania, is expected to get as much as 8 inches of snow with 1 inch of sleet, according to the National Weather Service.