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.
The March 1997 tornado outbreak was a major tornado outbreak that struck portions of the central and southern United States on March 1–2, 1997. Affecting areas mostly from Arkansas to Kentucky, the outbreak produced 58 tornadoes, including three violent (F4) tornadoes, and killed at least 27 people, including 25 in Arkansas alone and one death each in Mississippi and Tennessee. This was Arkansas' deadliest tornado outbreak since May 15, 1968, when 34 were killed in Jonesboro. Severe flooding also occurred across the Ohio and Tennessee Valleys, resulting in 16 Ohio counties and 44 Kentucky counties being declared disaster areas. The flash floods and damaging wind elsewhere caused 34 deaths across six states including 19 in Kentucky, five in Ohio, five in Tennessee, two in Texas and three in West Virginia. Damage estimates were about $1 billion (1997 USD) while 75,000 homes were damaged. (Full article...)
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Reflectivity (left) and relative velocity (right) radar loops of a thunderstorm that spawned an EF2 tornado in Longview, Texas, on December 23

Between November and December 2009, 51 tornadoes touched down across eight states. Collectively, the tornadoes injured nine people and wrought $20.36 million, much of which resulted from an EF3—the strongest tornado during the two-month period—that struck Lufkin, Texas, on December 23. Compared to annual averages, November was one of the quietest on record while December was one of the most active on record for their respective months. With only three confirmed events in November, the month ranks as the third quietest on record since 1950. The opposite is true for December, during which 45 tornadoes touched down; at the time, this was the second highest since 2000 and the sixth highest since reliable records began.

The month of November featured no tornado outbreaks while December featured two. The first spawned 7 tornadoes on December 2 and the second, more prolific event, resulted in 28 tornadoes from December 23–24. Twelve tornadoes touched down within the warning area of the National Weather Service office in Lake Charles, Louisiana—the largest such event in their jurisdiction since November 23, 2004. Both outbreaks were the result of strong extratropical cyclones that moved across the Southern United States, with tornadoes primarily developing along a cold front that extended south of the system's center or within supercells ahead of the front. (Full article...)
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The 1974 Xenia tornado destroying the southeast Pinecrest Garden district in Xenia, Ohio. The F5 tornado killed 32 people and injured 1150 others.

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Tracks of all tornadoes in the United States in 2000
This page documents the tornadoes and tornado outbreaks of 2000, primarily (but not entirely) in the United States. Most tornadoes form in the U.S., although some events may take place internationally, particularly in parts of neighboring southern Canada during the summer season. (Full article...)
List of tornadoes by year

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2024 tornado activity

Map of tornado warnings and confirmed tornadoes from the outbreak

A large, deadly and major 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 2 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.

Three fatalities directly linked to the tornadoes have been confirmed so far, with the majority in Oklahoma; one tornadic death also occurred in Tennessee on May 8. Three non-tornadic deaths related to straight-line winds also occurred. In addition, during the course of 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, where tornado emergencies were issued for four consecutive days between May 6–9, 2003, during a similarly large outbreak.

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

Tornado anniversaries

June 8

  • 1953 – One of the deadliest single tornadoes in U.S. history, an F5 tornado devastated portions of Flint and Beecher, Michigan, killing 116 people and injuring 844. Homes were obliterated along a mile-long stretch of one road. This was the last single tornado in the United States to kill more than 100 people until the 2011 Joplin tornado.
  • 1966 – An F5 tornado tore through Topeka, Kansas, killing 16 people and injuring 450. About 820 homes were destroyed and 3,000 were damaged as entire neighborhoods were leveled. The cost of damage was estimated at $100 to $250 million, $939 to $2,348 million in 2023, making it one of the costliest tornadoes in U.S. history.
  • 1984 – Just after midnight, an F5 tornado damaged or destroyed 90% of Barneveld, Wisconsin, including a subdivision of new houses, which was obliterated. More homes were destroyed in and near Black Earth. Nine people were killed and about 200 were injured. Residents were awoken by a loud clap of thunder just a few minutes before the tornado struck.

June 9

  • 1953 – One day after the devastating F5 tornado in Flint, Michigan, an F4 tornado (possibly F5) devastated Worcester, Massachusetts and the nearby communities of Shrewsbury, Southborough, and Westborough, killing 94 people and injuring nearly 1,300. This was the third extremely deadly tornado to strike the United States in 1953; the high death tolls led to the development of a nationwide warning system.
  • 1984 – A devastating tornado outbreak struck the eastern Soviet Union. A tornado estimated at F5 intensity struck Ivanovo. There is considerable uncertainty about the death toll; with estimates ranging from 69 to over 400. A 320,000-kilogram (710,000 lb), was flipped and a 50,000-kilogram (110,000 lb), water tank was thrown 200 metres (660 ft) A second tornado near Kostroma may also have reached F5 intensity.

June 10

  • 1938 – A slow-moving F5 tornado approached Clyde, Texas and made a sudden turn, devastating the west side of town and killing 14 people. A group of nine homes "vanished." A family of six attempting to flee in their car were picked up; four of the occupants died and the two survivors were found half a mile (0.8 km) away.
  • 1958 – An F4 (possibly F5) tornado devastated the southwestern part of El Dorado, Kansas, destroying 200 homes and killing 15 people. A car was thrown 100 yards and crashed through the roof of a house.

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Picture of a house destroyed by the Wallingford Tornado of 1878

Although historically the U.S. state of Connecticut is not typically known to fall casualty to tornadoes, more than 100 of these powerful storms have affected the state in modern history, resulting in at least 48 deaths, 780 injuries, and more than $500 million in damage. This list of tornadoes in the state is likely incomplete, as official records date back only to 1950 for tornadoes in the United States.

As with most of the northeastern United States, the number of tornadoes peaks in the summer months, normally in July or August. Hartford County has had the most tornadoes in the state, although since 1950 Litchfield County has reported the most tornadoes. Several areas have been struck more than once, and Waterbury has been struck by no less than four tornadoes since 1955. (Full article...)

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