January 5–6, 2025 United States blizzard

The January 5–6, 2025 United States blizzard was a significant and expansive winter weather event that produced blizzard conditions across the High Plains, as well as a long swath of accumulating snow and ice storm to the eastern half of the United States in early January 2025. Beginning on January 3, the system first made landfall along the northern West Coast of the United States before tracking southeastward, bringing severe winter conditions to multiple regions all the way to the Mid-Atlantic states and prompting numerous state emergency declarations. The storm system also produced 2025's first tornado, which touched down in northern California, before producing several more tornadoes within the Deep South a few days later on January 5. Most impacts from the storm ended by January 6 after the winter storm moved offshore into the Atlantic Ocean. The system was unofficially nicknamed Winter Storm Blair by the Weather Channel.

Winter storm advisories issued by the National Weather Service (NWS) throughout January 3 extended approximately 1,500 mi (2,400 km) from western Kansas to West Virginia, marking one of the most extensive winter weather warning areas in the 2024–25 North American winter season up to the beginning of 2025. Approximately 365,000 people were estimated to have lost power as a result of the blizzard, and the city of Richmond, Virginia, experienced a water outage and ensuing crisis due to damage sustained to water distribution facilities from the storm. The winter storm was also deadly, as at least 10 people were confirmed to have been killed as a result as well.