Track everything from current conditions, forecast timing and potential impacts from the winter storm here.

A winter storm will deliver a dangerous mix of sleet, freezing rain and heavy snow as it barrels across the country from the southern Rocky Mountains to New England from Friday into early next week.

By early Thursday afternoon, around 166 million people were under either a winter storm watch or a winter storm warning, and in total around 175 million to 180 million people were under some kind of w...