The late-April 1909 tornado outbreak was a deadly tornado outbreak that affected much of the central and Southern United States between April 29 and May 1, 1909. Affecting particularly the Mississippi and Tennessee Valleys, it killed over 150 people, 60 of them in the U.S. state of Tennessee alone. It was the deadliest known tornado outbreak to affect Tennessee until March 21, 1952, when 64 people died statewide. To this day, the 1909 outbreak remains the second-deadliest on record in Tennessee—even the April 3–4, 1974 Super Outbreak and the February 5–6, 2008, Super Tuesday outbreak produced just 45 and 31 deaths each in the state.