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Joplin tornado

2011 EF5 tornado in Joplin, Missouri, US

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A photo showing an EF5 tornado striking Joplin, Missouri on May 22, 2011. The tornado is being illuminated by a power flash.
Daniel Friskey · CC BY-SA 4.0

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Through Tornado and Great Plains

The tornado devastated a large portion of the city of Joplin, damaging nearly 8,000 buildings and destroying over 4,000 houses. The damage—which included major facilities like one of Joplin's two hospitals as well as much of its basic infrastructure—amounted to a total of $2.8 billion (equivalent to about $4 billion today), making the Joplin tornado the costliest single tornado in U.S. history. The insurance payout was the highest in Missouri history, breaking the previous $2 billion record from the hailstorm of April 10, 2001. The tornado was the fifth out of six total EF5 tornadoes that occurred in 2011, with four having occurred a month earlier during the 2011 Super Outbreak, and only two days before the same outbreak sequence produced another EF5 tornado in El Reno, Oklahoma on May 24.

Overall, the tornado killed 158 people (including eight indirect deaths) and injured some 1,150 others, making it the deadliest tornado of 2011. It ranks as the deadliest tornado in Missouri in addition to being one of the deadliest in the United States, having the highest death toll since the Glazier–Woodward F5 tornado in Texas and Oklahoma in 1947 and the seventh-deadliest overall in the U.S. It was the first F5/EF5 tornado to occur in Missouri since May 20, 1957, when an F5 tornado destroyed several suburbs of Kansas City, and only the second F5/EF5 tornado in Missouri since 1950. It was the third tornado to strike Joplin since May 5, 1971.

In the aftermath, President Barack Obama toured the city on May 29, speaking at a memorial service for the victims. He would also deliver the commencement address at Joplin High School a year later in 2012. Services were set up to help rebuild, with most of the town having businesses reopen as well as new ones being built by 2018. Additionally, the tornado helped inspire FEMA to create the Waffle House Index for disaster preparations as a result of some locations remaining open during the storm.

Meteorological synopsis

On the evening of May 21, 2011, an area of low pressure developed, centered over western South Dakota. This feature, in addition to steep lapse rates and dewpoints above 60 °F (16 °C), was conducive to the supercell development later in the day. Very large hail was forecasted, but the tornado threat was predicted to remain isolated. At 8:00 a.m. CDT (13:00 UTC), the National Weather Service (NWS) Storm Prediction Center (SPC) issued a slight risk of severe storms for much of the upper Plains and the Midwest.

By 8:00 a.m. CDT (13:00 UTC) on May 22, forecasters at the SPC realized that a more intense weather outbreak was likely to occur, and upgraded a large swath of the Midwest to a moderate risk. The system was forecast to evolve into a wave early Monday morning as a trough strengthened from the western United States. At the surface, a cold front was forecast to pass through the region later in the day, while a dryline was forecast to intersect the cold front in Kansas. These features, accompanied by the low-pressure system, encouraged very strong storm development along the cold front. By the 11:30 a.m. CDT (16:00 UTC) updated outlook, certainty had grown stronger that a major severe weather event would occur that afternoon. A public severe weather outlook was issued at this time, and the outlook stated that severe weather was expected that afternoon, with tornadoes, large hail and strong winds all named as threats.

At 1:30 p.m. CDT (18:30 UTC), four hours prior to the tornado, the SPC issued a tornado watch for southwestern Missouri, to remain in effect until 9:00 p.m. CDT. The watch predicted "explosive thunderstorm development," with a "strong tornado or two possible." Thunderstorms began developing between 2:00 and 3:00 p.m. over southeast Kansas and quickly became severe. As thunderstorm development continued moving to the east, forecasters became more concerned about imminent tornado development. A tornado warning west of Joplin that eventually produced the EF5 tornado was first issued at 5:17 p.m. CDT (22:17 UTC), 17 minutes before it touched ground and 19 minutes before it entered the city of Joplin.

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