A significant shift in weather patterns is underway as Arctic air moves southward, affecting regions from the Plains to the East Coast and Gulf Coast. According to AccuWeather, this cold front is accompanied by snowstorms in the Midwest and Northeast, prompting blizzard and winter storm warnings for tens of millions of residents. Areas under these warnings include Minnesota, Iowa, Michigan, New York, and Maine. The inclement weather follows a period of unusually warm temperatures, which set records in several cities. The transition to colder conditions is marked by a 'bomb cyclone' in Michigan, which has left thousands without power. This weather event is expected to disrupt travel plans and impact New Year's celebrations across affected regions.