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During the late afternoon and early evening hours of April 27, 2011, a violent, deadly, and devastating high-end EF4 multi-vortex tornado, commonly known as either the Tuscaloosa–Birmingham tornado, or more simply the Tuscaloosa tornado, devastated portions of Tuscaloosa and Birmingham, Alabama, as well as smaller communities and rural areas between the two cities. It is one of the costliest tornadoes on record, and was one of the 367 tornadoes that occurred during the 2011 Super Outbreak: the largest tornado outbreak in United States history.