Up to a foot of snow is expected from Ohio to DC in what could be the biggest such accumulation in over a decade.

Kentucky, Virginia, West Virginia, Kansas, Arkansas, and Missouri have declared states of emergency as the storm brings dangerous travel conditions.

A major winter storm sweeping much of the U.S. was producing heavy snow and ice as it threatened areas from the Central Plains through Mid-Atlantic — leaving tens of millions under weather alerts Sunday.

Storm Blair is headed to impact much of the central and eastern United States late Sunday. Blizzard conditions are likely for some areas and ice storms and heavy snow are expected in others, The Weather Channel predicts.