Winter storm spreads heavy snow, ice further across U.S.

A major winter storm with millions of Americans in its path spread rain, freezing rain and heavy snow further across the country on Thursday, disrupting travel as roads in many states were left icy by the wintry mix and airlines canceled thousands of flights due to the weather.

A long stretch of states from New Mexico to Maine remained under winter storm warnings and watches and the path of the storm stretched further from the central U.S. into more of the South and Northeast. Heavy snow was expected from the southern Rockies to northern New England, while forecasters said heavy ice buildup was likely from Texas to Pennsylvania.

"We have a lot of real estate covered by winter weather impacts this morning," Andrew Orrison, a meteorologist with the National Weather Service in College Park, Maryland, said early Thursday. "We do have an expansive area of heavy snow, sleet and freezing rain occurring."

Parts of Ohio, New York and northern New England were expected to see heavy snowfall as the storm moves to the east with 12 to 18 inches (30 to 45 centimetres) of snow possible in some places through Friday, Orrison said.

Along the warmer side of the storm, strong thunderstorms capable of damaging wind gusts and tornadoes were possible Thursday in parts of Mississippi and Alabama, the Storm Prediction Center said.