More than 11.5 million people are under blizzard warnings, another 4.3 million are under winter storm warnings, and about 20.6 million are under an extreme heat watch, according to forecasters.

A rapidly strengthening storm could evolve into a bomb cyclone, unleashing blizzard conditions in the Midwest and strong winds across much of the central and eastern United States.

A major winter storm is moving across the northern United States, bringing a mix of heavy snow, ice and blizzard conditions.

Snow is already falling across portions of the Northern Tier and the storm will charge east into the Great Lakes by later today.

A life-threatening situation is unfolding as a monstrous blizzard bomb cyclone is rapidly intensifying and unleashing extreme feet of snow and vicious wind gusts throughout the Midwest and Great Lakes.

A major snowstorm is blasting the Midwest and Great Lakes with blizzard conditions and what could be record snow. Ian Lee has a report on the conditions and Andrew Kozak has a look at the forecast.

Winter Storm Iona will bring feet of snowfall to the Upper Midwest and Great Lakes, including cities like Minneapolis, Green Bay, Wisconsin and Marquette, Michigan. Blizzard conditions are also possible across South Dakota,