High Quality Content by WIKIPEDIA articles! The Mid-May 2008 tornado outbreak sequence is a series of tornado outbreaks that affected the Southern Plains, the southeastern and Middle Atlantic region of the United States. The storm has produced 147 confirmed tornadoes starting on May 7 and lasting until late on May 15. The outbreak sequence killed 28 people across several states (25 from tornadoes). The event occurred less than a week after a deadly tornado outbreak that principally affected the state of Arkansas and killed 7 people.