January 9–11, 2025 United States winter storm

The January 9–11, 2025 United States winter storm was a significant and widespread winter storm that brought major impacts to the southern half of the United States. The system developed as a shortwave trough moved east across the southwestern United States. It developed into a Gulf low on January 8, and proceeded to bring upwards of up to 12 inches (30 cm) of snow to a large swath of the Ozarks as well as Texas all the way eastward to the Carolinas, with light snow accumulations as far north as southern New England. By January 11, most of the impacts from the storm had ended as it moved offshore.

Approximately 80 million people were estimated to be impacted by the winter storm, with state of emergencies declared across several states in advance of the storm. Cities that rarely see much snowfall at all, such as Atlanta, Georgia, received accumulating snow in addition to other wintry precipitation, leading to very hazardous conditions and numerous flight delays as well as travel-related accidents. More than 120,000 people are estimated to have lost power as a result of the storm, the majority of which came from the state of Georgia near the city of Atlanta which suffered major impacts and the worst storm there since the 2014 winter storm. With over 3,000 flights cancelled, the winter storm was responsible for the most significant daily delays since July 2024.