A severe winter storm is threatening the central and eastern United States, bringing snow, ice, and dangerous travel conditions to over 110 million people. The storm, the most recent of several winter blasts that have affected the country in recent weeks,

Moderate to major winter storm impacts are forecast across a dozen states as the polar vortex fuels cold, snowy conditions.

A new winter storm is on the horizon, and it could bring heavy snow and ice to the Central U.S. before taking aim at the mid-Atlantic. Here's what you need to know.