Tornado outbreak sequence of May 21–26, 2011
The tornado outbreak sequence of May 21–26, 2011 was one of the largest tornado outbreaks on record which affected the Midwestern and Southern regions of the United States. Most of the tornadoes developed in a corridor from Lake Superior southwest to central Texas; isolated tornadoes occurred in other areas. An especially destructive tornado destroyed one-third of Joplin, Missouri, resulting in 158 deaths and over 1,000 injuries. The Joplin tornado is the deadliest in the U.S. since April 9, 1947, when an intense tornado killed 181 in the Woodward, Oklahoma area. Tornado-related deaths also occurred in Arkansas, Kansas, Minnesota, and Oklahoma. Overall, the tornado outbreak resulted in 184 deaths, 6 of those non-tornadic, making it second only to the 2011 Super Outbreak as the deadliest since 1974, and the second costliest tornado outbreak in U.S. history behind that same April 2011 outbreak, with insured damage estimated at $4–7 billion.
Joplin, Missouri
Joplin has a humid subtropical climate ("Cfa"), as defined by the Köppen climate classification system, with cool, dry winters and hot, humid summers; the severe weather season from April through June is the wettest time of year. The monthly daily average temperature ranges from in January to in July. On average, 51 days of + highs, 3.5 days of + highs, 14 days where the high fails to rise above freezing, and 1.9 nights of sub- occur per year. It has an average annual precipitation of , including an average of snow. Extremes in temperature range from on February 13, 1905 up to on July 14, 1954; the last or below and the last + reading occurred on February 3 and August 2, 2011, respectively. The city is located in Tornado Alley. Several storms have hit the city, including an F3 tornado in 1971, a tornado in 1973, an EF1 tornado on May 8, 2009, a blizzard on February 1, 2011, and an EF5 tornado on May 22, 2011.