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The 2011 Super Outbreak was the largest, costliest, and one of the deadliest tornado outbreaks ever recorded, taking place in the Southern, Midwestern, and Northeastern United States from April 25 to 28, 2011, leaving catastrophic destruction in its wake.
In late 2023, American meteorologist and tornado expert Thomas P. Grazulis created the Outbreak Intensity Score (OIS) as a way to rank tornado outbreaks. [1] [2] For the score, only significant tornadoes are counted: F2/EF2 tornadoes receive 2 points each, F3/EF3 tornadoes receive 5 points each, F4/EF4 tornadoes receive 10 points each, and F5/EF5 tornadoes receive 15 points each. [1]
The 2008 Super Tuesday tornado outbreak [2] was a deadly tornado outbreak which affected the Southern United States and the lower Ohio Valley on February 5 and 6, 2008. The event began on Super Tuesday, while 24 states in the United States were holding primary elections and caucuses to select the presidential candidates for the upcoming presidential election.
The super-tornado outbreak of April 3 and 4, 1974, was the worst in U.S. history, with 148 twisters touching down in 13 states. When it had ended 16 hours later, 330 people were dead and 5,484 ...
This marked the beginning of Indiana’s largest tornado outbreak in history. Another 20 tornadoes spun up across 45 other counties in the state between 2 and 8 p.m. that day. The tornadoes killed ...
It was the deadliest tornado of the 2011 Super Outbreak, the largest tornado outbreak in United States history. The second of four EF5 tornadoes to touch down on April 27, along with the Philadelphia, MS , Smithville, MS , and Rainsville, AL tornadoes; the tornado reached a maximum width of 1.25 miles (2.01 km) and was estimated to have had ...
It is one of the costliest tornadoes on record, and was one of the 367 tornadoes in the 2011 Super Outbreak, the largest tornado outbreak in United States history. The tornado reached a maximum path width of 1.5 miles (2.4 km) during its track through Tuscaloosa, and again when it crossed I-65 north of Birmingham, attaining estimated wind ...
The long-track Mississippi–Alabama EF4 tornado was down from 2 hours, 53 minutes, the longest duration for a tornado in the outbreak. [7] The outbreak continued during the overnight and into the morning of April 28, with 47 more tornadoes occurring from Florida to New York. Most of the tornadoes very relatively weak and caused comparatively ...