Blizzard conditions and tornadoes disrupt travel as winter brings frigid reality check back to the US

By CNN Meteorologist Briana Waxman (CNN) — A powerful, rapidly intensifying winter storm sweeping across the central and eastern US is bringing a messy mix of blizzard conditions, severe thunderstorms, tornadoes and a sharp reality check to winter-like cold, snarling travel during one of the busiest stretches of the holiday season. More than 30 million