Missouri
Located in Tornado Alley, Missouri also receives extreme weather in the form of severe thunderstorms and tornadoes. The most recent tornado in the state to cause damage and casualties was the 2011 Joplin tornado, which destroyed roughly one-third of the city of Joplin. The tornado caused an estimated $1–3 billion in damages, killed 159 (+1 non-tornadic), and injured over 1,000 people. It was the first EF5 to hit the state since 1957 and the deadliest in the U.S. since 1947, making it the seventh deadliest tornado in American history and 27th deadliest in the world. St. Louis and its suburbs also have a history of experiencing particularly severe tornadoes, the most recent memorable one being an EF4 tornado that damaged Lambert-St. Louis International Airport on April 22, 2011. One of the worst tornadoes in American history struck St. Louis on May 27, 1896, killing at least 255 and causing $10 mil. damage ($3.9 bil. damage in 2009) or $ in today's dollars.
2011 Joplin tornado
However, the EF5 rating stood as the National Weather Service in Springfield, Missouri stated that their survey teams found only a very small area of EF5 structural damage and that it could have easily been missed in the survey (at and around St. John's Medical Center). Bill Davis, head of the NWS station in Springfield, said that the results of the study "do not surprise me at all," adding that "there was only a very small area of EF5 damage in Joplin...we knew right off the bat there was EF4 damage. It took us longer to identify the EF5 damage and that it would take winds of over 200 miles per hour to do that damage." Additionally, the basis for the EF5 rating in Joplin was mainly contextual rather than structural, with non-conventional damage indicators such as removal of concrete parking stops, manhole covers, reinforced concrete porches, driveways, and asphalt were used to arrive at a final rating of EF5, as it was concluded that these specific instances of damage were indicative of winds exceeding 200 miles per hour. The presence of windowed structural debris, instances of very large vehicles such as buses, vans, and semi-trucks being thrown hundreds of yards to several blocks from their points of origin, the fact that some homeowners never located their vehicles, and the overwhelming extent and totality of the destruction in Joplin were also taken into consideration to conclude EF5 intensity.