Portal:Tornadoes

The Tornadoes Portal

A tornado near Anadarko, Oklahoma, in 1999
Tornadoes are violently rotating columns of air that are in contact with the Earth and either a cumulonimbus or a cumulus cloud. Tornadoes are often referred to as twisters, whirlwinds, or cyclones. While most tornadoes attain winds of less than 110 miles per hour (180 km/h), are about 250 feet (80 m) across, and travel a few miles (several kilometers), the wind speeds in the most intense tornadoes can reach 300 miles per hour (480 km/h), are more than two miles (3 km) in diameter, and stay on the ground for dozens of miles (more than 100 km). Various types of tornadoes include the multiple vortex tornado, landspout, and waterspout. Other tornado-like phenomena that exist in nature include the gustnado, dust devil, fire whirl, and steam devil. Most tornadoes occur in North America (in the United States and Canada), concentrated in a region nicknamed the Tornado Alley. Tornadoes also occur in South America, South Africa, Europe, Asia, and Oceania.
A waterspout near Florida in 1969. Two flares with smoke trails (near base of photograph) have been discharged to indicate wind direction and general speed.

A waterspout is a rotating column of air that occurs over a body of water, usually appearing as a funnel-shaped cloud in contact with the water and a cumuliform cloud. There are two types of waterspout, each formed by distinct mechanisms. The most common type is a weak vortex known as a "fair weather" or "non-tornadic" waterspout. The other less common type is simply a classic tornado occurring over water rather than land, known as a "tornadic", "supercellular", or "mesocyclonic" waterspout, and accurately a "tornado over water". A fair weather waterspout has a five-part life cycle: formation of a dark spot on the water surface; spiral pattern on the water surface; formation of a spray ring; development of a visible condensation funnel; and ultimately, decay. Most waterspouts do not suck up water.

While waterspouts form mostly in tropical and subtropical areas, they are also reported in Europe, Western Asia (the Middle East), Australia, New Zealand, the Great Lakes, Antarctica, and on rare occasions, the Great Salt Lake. Some are also found on the East Coast of the United States, and the coast of California. Although rare, waterspouts have been observed in connection with lake-effect snow precipitation bands. (Full article...)

List of selected tornado articles

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This is a list of all tornadoes that were confirmed by local offices of the National Weather Service in the United States from January to March 2010. (Full article...)

List of selected tornado lists

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Damage to a marina in Vancouver from an EF1 tornado.

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This page documents the tornadoes and tornado outbreaks of 1987, primarily in the United States. Most tornadoes form in the U.S., although some events may take place internationally. Tornado statistics for older years like this often appear significantly lower than modern years due to fewer reports or confirmed tornadoes. (Full article...)

List of tornadoes by year

2024 tornado activity

Map of tornado warnings and confirmed tornadoes from the outbreak

A large, major, and deadly tornado outbreak occurred across the Central and Southern United States from May 6–10, 2024, as a result of a slow-moving trough that was moving across the country. The Storm Prediction Center (SPC) issued a tornado-driven high risk convective outlook for portions of central Oklahoma and extreme southern Kansas early on May 6. Millions of people were put under a particularly dangerous situation (PDS) tornado watch later that evening, as many tornadoes were reported across the region, particularly in Oklahoma, where a violent EF4 tornado struck the towns of Barnsdall and Bartlesville, Oklahoma. Severe and tornadic weather spread eastward over the Mississippi, Ohio, and Tennessee Valleys over the next two days, with a nocturnal outbreak occurring in the latter on May 8, as tornadic supercell thunderstorms produced many tornadoes across the states of Tennessee, northern Alabama and western Georgia. The system responsible for the outbreak finally moved offshore by May 10 after producing several more tornadoes across the Southeast, including two EF2 tornadoes and hurricane-strength straight-line winds that moved through Tallahassee. This large outbreak came less than two weeks after a similarly large and deadly outbreak occurred across most of the same regions.

Five fatalities directly linked to the tornadoes were confirmed from the outbreak: two in Oklahoma on May 6, one in Tennessee on May 8, and two in Florida on May 10. Three non-tornadic deaths related to straight-line winds also occurred. In addition, during the outbreak, tornado emergencies were issued for three consecutive days between May 6–8 for damaging tornadoes; the last time that this phenomenon had occurred was exactly 21 years prior, when tornado emergencies were issued for four consecutive days between May 6–9, 2003, during a similarly large outbreak.

Overall, 179 tornadoes were confirmed from the outbreak, most of which were clustered around Oklahoma, Michigan, Tennessee, and Alabama, earning 51 points on the outbreak intensity score. (Full article...)

Tornado anniversaries

November 29

  • 1991 – An F4 tornado moved through the southern and southeastern parts of Springfield, Missouri, destroying 53 homes and damaging 160 others. Two people were killed, one in his home and another in a truck thrown from the highway, and 64 were injured.
  • 1992 – The strongest tornado on record in Australia, rated F4, struck Bucca, Queensland, severely damaging or destroying nine homes and killing 20 head of cattle. A truck was carried 300 meters.

November 30

  • 1952 – A tornado hit Albertynesville, South Africa near Johannesburg, killing at least 20 people and injuring 400. Cars were reportedly lifted 100 feet (30 m) in the air.
  • 2016 – Tornadoes hit the southeastern United States on the last day of a tornado outbreak. An EF3 tornado killed three people in a mobile home in Rosalie, Alabama and another in a house near Ider. A daycare center was swept off its foundation; the connection to the foundation had been rotted. Another EF3 tornado hit Ocoee, Tennessee, killing two people in a mobile home.

December 1

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The following are images from various tornado-related articles on Wikipedia.

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This is either a featured article or featured list, which represents some of the best articles on English Wikipedia.

A cumulative map of all tornadoes and tornado warnings throughout the outbreak

Accompanying Hurricane Katrina's catastrophic coastal impacts was a moderate tornado outbreak spawned by the cyclone's outer bands. The event spanned August 26–31, 2005, with 57 tornadoes touching down across 8 states. One person died and numerous communities suffered damage of varying degrees from central Mississippi to Pennsylvania, with Georgia sustaining record monetary damage for the month of August. Due to extreme devastation in coastal areas of Louisiana and Mississippi, multiple tornadoes may have been overlooked—overshadowed by the effects of storm surge and large-scale wind—and thus the full extent of the hurricane's tornado outbreak is uncertain. Furthermore, an indeterminate number of waterspouts likely formed throughout the life cycle of Hurricane Katrina.

The outbreak began with an isolated F2 over the Florida Keys on August 26; no tornadoes were recorded the following day as the storm traversed the Gulf of Mexico. Four weak tornadoes were observed on August 28 as the hurricane approached land, each causing little damage. Coincident with Katrina's landfall, activity began in earnest on August 29 with numerous tornadoes touching down across Gulf Coast states. Georgia suffered the greatest impact on this day, with multiple F1 and F2 tornadoes causing significant damage; one person died in Carroll County, marking the first known instance of a tornado-related death in the state during August. A record 18 tornadoes touched down across Georgia on August 29, far exceeding the previous daily record of just 2 tornadoes for the month throughout the state. Activity diminished over the subsequent two days as the former hurricane moved northward. Several more tornadoes touched down across the Mid-Atlantic states before the cessation of the outbreak just after midnight local time on August 31. (Full article...)

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