A major winter storm is forecast to impact 15 states, threatening severe conditions including heavy snowfall and strong winds. The National Weather Service has issued warnings for states such as Maine, North Carolina, Virginia, West Virginia, Massachusetts, Connecticut, New Hampshire, New York, Vermont, Maryland, California, Pennsylvania, Alaska, Delaware, and New Jersey, urging residents to prepare for potentially life-threatening circumstances. The storm is expected to unfold from Sunday through early next week, with regions like northern Denali and Fairbanks North Star in Alaska, as well as parts of Massachusetts and Connecticut, anticipating up to 20 inches of snow.