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The deadliest tornado outbreak sequence in American history. Killer tornadoes touched down from Texas to Pennsylvania. Produced at least three F5 tornadoes and several F4s, including an F4 that killed at least 255 people and injured 1,236 in the St. Louis area. In Sherman Texas on May 15, one of the most intense tornadoes of the 19th century ...
The 2011 Super Outbreak was the largest tornado outbreak spawned by a single weather system in recorded history; it produced 367 tornadoes from April 25–28, with 223 of those in a single 24-hour period on April 27 from midnight to midnight CDT, [4] [11] fifteen of which were violent EF4–EF5 tornadoes. 348 deaths occurred in that outbreak, of which 324 were tornado related.
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 tornado was part of a tornado outbreak that spawned more than a dozen tornadoes on April 5 and 6 of that year. ... The deadliest tornado in Wisconsin history happened on June 12, 1899, when ...
That figure is inflated somewhat by 2011, when one of the costliest and deadliest tornado outbreaks ever recorded claimed the lives of at least 553 people, including more than 150 in one Missouri ...
While tornadoes are less common in New York compared to regions like the Midwest, they remain a notable and occasionally destructive aspect of the state's weather history. See Rochester tornadoes.
The deadliest tornado on record was the Daulatpur–Saturia tornado which occurred in the Dhaka division of Bangladesh on April 26, 1989. With a rating of at least F3 from the World Meteorological Organization and top winds estimated at greater than 200 mph (320 km/h), the tornado killed an estimated 1,300 people and injured at least 12,000 others.
These are some notable tornadoes, tornado outbreaks, and tornado outbreak sequences that have occurred around the globe. Exact death and injury counts are not possible; especially for large events and events before 1955. Prior to 1950 in the United States, only significant tornadoes are listed for the number of tornadoes in outbreaks.