A major winter storm that broke snowfall records in the Midwest is now slamming the mid-Atlantic and causing the cancellation of more than 1,900 flights across the U.S. More than 50 million Americans from Kentucky to Washington, D.C., remain under winter alerts as the last of the storm pushes through Monday afternoon.

Tens of millions were under winter storm advisories and hundreds of thousands of homes and businesses were without power as the storm stretched from Kansas to Virginia and Washing