A massive Arctic blast is currently affecting millions across the United States, bringing brutally cold temperatures and heavy lake-effect snow. Many travelers are facing treacherous conditions as they attempt to return home after Thanksgiving. The cold air mass is expected to persist, causing dangerously low wind chills and the potential for blizzard conditions, particularly in the Great Lakes, Plains, and Midwest regions. With severe weather warnings in effect, travelers are advised to remain cautious as disruptions in travel become likely, making for a challenging return from the holiday weekend.