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Tornado Alley, also known as Tornado Valley, is a loosely defined location of the central United States and Canada where tornadoes are most frequent. [1] The term was first used in 1952 as the title of a research project to study severe weather in areas of Texas , Louisiana , Oklahoma , Kansas , South Dakota , Iowa and Nebraska .
Significant tornado – A substantial tornado, one that is rated F2-F5 or EF2-EF5. Grazulis also includes (E)F0-(E)F1 tornadoes that cause a fatality in his definition for The Tornado Project database. Significant tornado parameter (STP) – Model parameter calculated using Shear values, Instability values, and vorticity values.
People live closer together in the South than in the traditional area associated with Tornado Alley, meaning that more significant numbers of people can be in the path of a tornado.
A history of twisters: ... Some have speculated that tornado alley's eastward movement may mean portions of central Ohio are now part of the infamous area where twisters are thought to be more common.
Tornado reports in the U.S. have been officially collated since 1950. These reports have been gathered by the National Climatic Data Center (NCDC), based in Asheville, North Carolina. A tornado can be reported more than once, such as when a storm crosses a county line and reports are made from two counties.
Tornado alley has changed and shifted over the years, but as of 2023 Accuweather lists eight states as being part of this area with a unique combination of geographic and meteorological factors ...
Two weeks after the April 14–16 event, Dixie Alley was the epicenter of the 2011 Super Outbreak, which was the largest tornado outbreak ever recorded, as well as the fourth-deadliest outbreak in United States history, with over 300 people dead. [19] The Easter 2020 Tornado Outbreak also happened in Dixie Alley.
The Great Plains has long been considered the country’s tornado hotbed. But in the past two decades, a swath of the southeastern US has proven much more deadly. The Southern Tornado Alley: Where ...