Extreme weather conditions from coast to coast put more than half the U.S. in the path of rough conditions. Storms across the nation's eastern half forced airlines to cancel more than 3,000 flights nationwide Monday. Many schools closed early in the mid-Atlantic states, where high winds and tornadoes were in the forecast. Blizzards buried parts of Michigan, Wisconsin and Minnesota while torrential rains flooded homes and washed out roads in Hawaii. California is dealing with unusually high temperatures for this time of year. Areas near San Francisco could see temperatures in the high 80s.

Forecasters say over half the U.S. population could be affected by snow, ice or bitter cold as a winter storm sweeps across the county. On Friday, schools in Chicago and other cities canceled classes due to extreme cold. Then the storm is forecast to bring snow, sleet, and ice from Texas to New England. Forecasters warn the damage could rival a hurricane, especially in areas hit by ice. More than 1,000 flights were delayed or canceled Friday, with more expected Saturday. People are stocking up on water, food and generators as they prepare for the storm.

A surge of arctic air is bringing strong winds, heavy snow and frigid temperatures to the Great Lakes and Northeast, a day after a bomb cyclone that hit the northern U.S. Tens of thousands of customers were without power early Tuesday, with Michigan hardest hit. The National Weather Service predicts snow squalls and gusty winds for the Eastern U.S. New York's governor warned of whiteout conditions in parts of the state. In Michigan, snow piled up quickly on Monday, and high waves on Lake Superior sent cargo ships into harbors for shelter.