2011 Philadelphia, Mississippi tornado
During the afternoon hours of April 27, 2011, an extremely powerful and fast-moving EF5 multi-vortex tornado, known commonly as the Philadelphia, Mississippi tornado or the Philadelphia EF5, touched down in eastern Mississippi causing catastrophic damage to the northern outskirts of the town of Philadelphia. Part of the historic 2011 Super Outbreak, the largest tornado outbreak on record, this was the first of four EF5 tornadoes to touch down that day and the first such storm in Mississippi since the 1966 Candlestick Park tornado.
Source: Wikipedia — 2011 Philadelphia, Mississippi tornado (CC BY-SA 4.0)