The claim that an Arctic blast would bring frigid temperatures to most of the United States is largely accurate. Primary sources such as the National Weather Service and NOAA reported that a large mass of Arctic air moved south from Canada due to a disruption in the polar vortex, leading to well-below-average temperatures, snow, and icy conditions across much of the central and eastern U.S. Secondary reporting from outlets like NBC News and the Associated Press confirmed that up to two-thirds of the country was affected, with several cities experiencing record or near-record lows and widespread travel disruptions. While government weather agencies aim to provide objective public safety information and major news organizations may emphasize severe impacts to attract attention, the data from forecasts and observed conditions support the core of the claim. However, the phrase “most of the U.S.” somewhat overgeneralizes the impact, as some regions—particularly parts of the West—were less affected or experienced milder conditions. Overall, the evidence strongly supports the claim, with only minor exaggeration in geographic scope.
