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Tornado Down: Original Edition: The Unputdownable No. 1 Sunday Times Bestseller

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But rarely are they anything like the destructive columns of wind that can often sweep across America’s ‘Tornado Alley’. There are areas which people believe to be protected from tornadoes, whether by being in a city, near a major river, hill, or mountain, or even protected by supernatural forces. Early estimates suggested that the tornado family—identified by some media outlets as a "Quad-State tornado", due to the storm's long track and similarity to the 219-mile (352km) Tri-State tornado of 1925—may have cut a path of up to 250 miles (400km) across the affected areas, making it the longest-tracked tornado in history. Although this is a widely accepted theory for how most tornadoes form, live, and die, it does not explain the formation of smaller tornadoes, such as landspouts, long-lived tornadoes, or tornadoes with multiple vortices. Other tornado-like phenomena that exist in nature include the gustnado, dust devil, fire whirl, and steam devil.

The word tornado comes from the Spanish word tornado (past participle of 'to turn', or 'to have turned', which comes from the Latin tonare 'to thunder'.The tornado dissipated as the parent storm merged with another storm producing a second EF2 tornado in Hart County as they passed south of Munfordville. After crossing the Mississippi River into northwestern West Tennessee, that tornado dissipated, and a high-end EF4 tornado formed and moved through Western Kentucky, where the towns of Cayce, Mayfield, Benton, Princeton, Dawson Springs, and Bremen suffered severe to catastrophic damage. According to the Glossary of Meteorology, a funnel cloud is any rotating cloud pendant from a cumulus or cumulonimbus, and thus most tornadoes are included under this definition. The tornado became weak again as it passed just south of Braggadocio at EF1 intensity, damaging or destroying some barns and outbuildings, and inflicting roof damage to homes. Sarah Horton, a site investigator from Torro, said she could tell it was a tornado "because of its long narrow track, because debris has been lifted up and carried some distance and its direction of movement shows it was tornadic".

The most extreme impacts resulted from two long-track supercell thunderstorms that produced families of strong tornadoes. The rate of occurrence drops off quickly with increasing strength—less than 1% are violent tornadoes (EF4, T8 or stronger). In the case of violent tornadoes, only a small portion of the path is of violent intensity, most of the higher intensity from subvortices. Meteorologists still do not know the exact mechanisms by which most tornadoes form, and occasional tornadoes still strike without a tornado warning being issued. Every morning they study weather conditions and head for the area that seems most likely to spawn a twister.Simulation and Analysis of Tornado Development and Decay within a Three-Dimensional Supercell Thunderstorm". As the funnel descends, the RFD also reaches the ground, fanning outward and creating a gust front that can cause severe damage a considerable distance from the tornado. Tornadic storms do not contain more lightning than other storms and some tornadic cells never produce lightning at all. death – This strong tornado initially caused minor roof, tree, and outbuilding damage before quickly intensifying as it crossed KY 527, where several homes sustained significant damage, including one that lost its second story.

The following day, the SPC noted increased certainty of organized severe thunderstorm potential extending from southeastern Arkansas northeast into southern Indiana, thereby upgrading that region to an enhanced risk. The United States averages about 1,200 tornadoes per year, followed by Canada, averaging 62 reported per year. This was the third of three brief tornadoes in the path break between the first EF4 tornado and the second EF4 tornado. Most tornadoes produce strong winds at the surface while the visible funnel is still above the ground, so it is difficult to discern the difference between a funnel cloud and a tornado from a distance.

As it moved through the south side of Bowman, it caused EF0 to EF1 damage as roofs were damaged, power poles and tree limbs were downed, and a radio antennae at a residence was bent. A Doppler on Wheels radar loop of a hook echo and associated mesocyclone in Goshen County, Wyoming on June 5, 2009. Numerous homes, mobile homes, and businesses were damaged or destroyed in Trumann, with the most intense damage occurring in the northeastern part of town. Unlike audible signatures, tornadic signatures have been isolated; due to the long-distance propagation of low-frequency sound, efforts are ongoing to develop tornado prediction and detection devices with additional value in understanding tornado morphology, dynamics, and creation. Weak tornadoes, or strong yet dissipating tornadoes, can be exceedingly narrow, sometimes only a few feet or couple meters across.

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