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|Date of tornado outbreak:||May 5, 2021|
|Maximum rated tornado2:||EF5 tornado|
|Tornadoes caused:||421 (record)|
|Areas affected:||Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Nebraska, Oklahoma, Tennessee, Texas|
1Time from first tornado to last tornado
Before the Tornado Outbreak
About a week before the tornado outbreak, computer models were predicting a record breaking severe weather event in the plains, Midwest, and the Southern portions of the United States. One Meteorologist at TV station KOCO in Oklahoma City says "If you do not have a NOAA weather radio, buy one before Wednesday." About two days before May 5, The Storm Prediction Center in Norman, Oklahoma issues a High Risk of severe weather from Florida westward to Texas and Oklahoma. The worst parts of the storm were expected to hit Oklahoma while other strong storms occur in the Gulf of Mexico and Florida. Originally, the National Weather Service predicted at least 450 tornadoes from this setup, but then they changed their predictions to around 415. Meteorologists named this tornado outbreak "Super Outbreak III" (The Super Outbreak was the April 3, 1974 outbreak and Super Outbreak II was the April 25-28, 2011 tornado outbreak) about two days before the storm occured because how powerful the storm is.