February 13–17, 2021 North American winter storm

A crippling winter and ice storm, unofficially named Winter Storm Uri by the Weather Channel and various media outlets and government agencies, also referred to as the Great Texas Freeze or Snowmageddon, caused catastrophic and widespread impacts across the United States, Northern Mexico, and parts of Canada from February 13 to 17, 2021. It started out in the Pacific Northwest and quickly moved into the Southern United States, before moving on to the Midwestern and Northeastern United States a couple of days later.

The storm resulted in the National Weather Service issuing various winter weather alerts impacting over 170 million Americans. Over 9.9 million people in the U.S. and Mexico experienced blackouts, many due to a major power crisis in Texas, which became the largest in the U.S. since the Northeast blackout of 2003. The storm contributed to a severe cold wave that affected most of North America. The storm also brought severe destructive weather to Southeastern United States, including several tornadoes. On February 16, there were at least 20 direct fatalities and 13 indirect fatalities attributed to the storm; by January 2, 2022, the death toll had risen to at least 290, including 276 people in the United States and 14 people in Mexico. A subsequent data analysis using a technique that examined the total number of reported deaths during and immediately after the storm estimated that about 700 people were killed by the storm during the week in which the power outages were most widespread.

The National Oceanic and Atmospheric Administration officially documented US$26.5 billion in damage in the United States from the winter storm. It was also the deadliest winter storm in North America since the 1993 Storm of the Century, which killed 318 people.