A potentially historic, massive winter storm will slam more than half of the United States today, moving east as it brings heavy snow, widespread ice accumulation and dangerous cold.

Utility companies and state officials are preparing for a forecasted ice storm that could bring down power lines and cause widespread outages

The storm is expected to sweep through much of the United States, leaving "extremely dangerous" conditions in its wake as it tracks eastwards from the High Plains and Rockies, the National Weather Ser...