A tornado struck Moore, Oklahoma, United States, killing 24 people and causing an estimated $2 billion of damage.

The 2013 Moore tornado was a large and extremely violent EF5 tornado that ravaged Moore, Oklahoma, and adjacent areas on the afternoon of May 20, 2013, with peak winds estimated at 200–210 miles per hour (320–340 km/h), killing 24 people and injuring 212 others. The tornado was part of a larger outbreak from a slow-moving weather system that had produced several other tornadoes across the Great Plains over the previous two days, including five that had struck portions of Central Oklahoma the day prior on May 19. The tornado, along with the 2011 Hackleburg–Phil Campbell and El Reno–Piedmont tornadoes, has the highest rated official windspeed on the Enhanced Fujita scale, if the upper range is considered.

Moore is a city in Cleveland County, Oklahoma, United States, and is part of the Oklahoma City metropolitan area. The population was 62,793 at the 2020 census, making Moore the seventh-largest city in the state of Oklahoma.

Oklahoma is a landlocked state in the South Central and Southwestern region of the United States. It borders Texas to the south and west, Kansas to the north, Missouri to the northeast, Arkansas to the southeast, New Mexico to the west, and Colorado to the northwest. Partially in the western extreme of the Upland South, it is the 20th-most extensive and the 28th-most populous of the 50 United States. Its residents are known as Oklahomans and its capital and largest city is Oklahoma City.