This animation depicts surface air temperatures across part of the Northern Hemisphere, including North America, from January 21 to 29. The brief pulses show daily warming and cooling, while the broader pattern reveals cold air spreading south and east and lingering through much of the week. In the days after the storm, dangerously cold weather persisted. In the South, an extreme cold warning was in effect in south-central Texas overnight on January 26, with temperatures dipping into the single digits. NASA’s Disasters Response Coordination System has been activated to support agencies responding to the winter storm.