This is a list of all tornadoes that were confirmed by local offices of the National Weather Service in the United States in April 2011. April was the most active tornado month in United States history, with 773 tornadoes being confirmed from April 4 to April 30. The first tornado event of the month accompanied a large-scale damaging wind event, during which eight people were killed by falling trees. The severe weather outbreak also produced 46 tornadoes, mainly across Arkansas, Kentucky, and Mississippi. Tornado activity continued into early April 5, where an EF2 tornado in Dodge County, Georgia, resulted in one fatality. A couple tornadoes, EF1 and EF2, struck Pulaski County, Virginia, on April 8, ahead of a second outbreak from April 9–11. This outbreak significantly impacted the Upper Midwest, including Iowa and Wisconsin. Iowa was struck by numerous tornadoes on April 9, including three rated EF3 and one rated EF4, mainly affecting Sac, Buena Vista, and Pocahontas counties. Sixteen tornadoes touched down in Wisconsin on April 10, including an EF3 tornado that struck Merrill, ranking the outbreak as the state's largest April event on record as well as one of the largest single-day outbreaks ever. Although no one was killed, nineteen people were injured during the outbreak.
