A tornado is a violently rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. It is often referred to as a twister, whirlwind or cyclone, although the word cyclone is used in meteorology to name a weather system with a low-pressure area in the center around which, from an observer looking down toward the surface of the Earth, winds blow counterclockwise in the Northern Hemisphere and clockwise in the Southern. Tornadoes come in many shapes and sizes, and they are often visible in the form of a condensation funnel originating from the base of a cumulonimbus cloud, with a cloud of rotating debris and dust beneath it. Most tornadoes have wind speeds less than 180 kilometers per hour, are about 80 meters across, and travel several kilometers before dissipating. The most extreme tornadoes can attain wind speeds of more than 480 kilometers per hour (300 mph), are more than 3 kilometers (2 mi) in diameter, and stay on the ground for more than 100 km.
The 1974 Super Outbreak was the second-largest tornado outbreak on record for a single 24-hour period, just behind the 2011 Super Outbreak. It was also the most violent tornado outbreak ever recorded, with 30 F4/F5 tornadoes confirmed. From April 3–4, 1974, there were 148 tornadoes confirmed in 13 U.S. states and the Canadian province of Ontario. In the United States, tornadoes struck Illinois, Indiana, Michigan, Ohio, Kentucky, Tennessee, Alabama, Mississippi, Georgia, North Carolina, Virginia, West Virginia, and New York. The outbreak caused roughly $843 million USD in damage, with more than $600 million occurring in the United States. The outbreak extensively damaged approximately 900 sq mi (2,331 km2) along a total combined path length of 2,600 mi (4,184 km). At one point, as many as 15 separate tornadoes were occurring simultaneously.
The 1985 United States–Canada tornado outbreak, referred to as the Barrie tornado outbreak in Canada, was a major tornado outbreak that occurred in Ohio, Pennsylvania, New York, and Ontario, on May 31, 1985. In all 44 tornadoes were counted including 14 in Ontario, Canada. It is the largest and most intense tornado outbreak ever to hit this region, and the worst tornado outbreak in Pennsylvania history in terms of deaths and destruction.
The tornado outbreak of January 1–2, 2006, was one of the largest tornado outbreaks ever recorded in the month of January. The outbreak affected much of the Central and Southern United States and produced 20 tornadoes. The tornadoes caused considerable damage in the states of Kentucky and Georgia. There were no tornado related fatalities and only minor injuries were reported.
The 1899 New Richmond tornado was an estimated F5 tornado which formed on the early evening of Monday, June 12, 1899 and tore a 45-mile path of destruction through the St. Croix, Polk and Barron counties in west-central Wisconsin. It caused 117 fatalities, twice as many injured, and hundreds homeless. The worst devastation brought by the tornado was at the city of New Richmond, Wisconsin, which took a direct hit from the storm. Over half the town was left in ruins by the tornado, which also caused minor damage to the surrounding communities in the area. More than $300,000 (USD) in damage was reported. As of 2019, it ranks as the ninth deadliest tornado in United States history, as well as the deadliest ever recorded in Wisconsin.
The 1989 Northeastern United States tornado outbreak was a series of tornadoes which caused more than $130 million in damage across the Northeastern United States on July 10, 1989. The storm system affected five states with severe weather, including hail up to 2.5 inches (6.4 cm) across, thunderstorm winds up to 90 mph (140 km/h), and 17 tornadoes. Several towns in New York and Connecticut were particularly hard-hit. Several homes were leveled in Schoharie, New York and extensive damage occurred in Bantam, Connecticut. A large section of Hamden, Connecticut, including an industrial park and hundreds of homes, was destroyed; and in some places buildings were flattened to the ground.
An intense tornado outbreak occurred on May 22 in western and Central Oklahoma and on May 23 from eastern and central Oklahoma to central Iowa. A total of 43 tornadoes were reported during the two-day outbreak, of which 14 were recorded as strong or violent. The outbreak claimed no fatalities and there were only 12 injuries from a tornado that touched down near Clinton, Oklahoma causing significant damage. The tornado outbreak overall left $32.8 million in damage.
The 2007 Groundhog Day tornado outbreak was a localized but devastating tornado event that took place in central Florida early on February 2, 2007. Early morning temperatures had risen well above average for the season; combined with increased moisture and a powerful jet stream, this created enough instability and wind shear for thunderstorms to rotate and spawn tornadoes. Due to the conditions, a long-tracked supercell formed and produced three tornadoes over one hour and seventeen minutes. The supercell resulted in a 70-mile (110-kilometer) trail of damage.
This page documents notable tornadoes and tornado outbreaks worldwide in 2001. Strong and destructive tornadoes form most frequently in the United States, Bangladesh, and Eastern India, but they can occur almost anywhere under the right conditions. Tornadoes also develop occasionally in southern Canada during the Northern Hemisphere's summer and somewhat regularly at other times of the year across Europe, Asia, and Australia. Tornadic events are often accompanied with other forms of severe weather, including strong thunderstorms, strong winds, and hail.
On the evening of Tuesday, August 7, 1979, at least three tornadoes touched down in southwestern Ontario, devastating scores of farms and homes in the Woodstock area. The southern end of that city suffered some of the most intense destruction along with several other nearby towns in Oxford County. Two people died, 142 were injured, and hundreds of homes suffered significant damage. Overall monetary losses totaled an approximate $100 million in 1979 Canadian dollars.
The 1925 Miami tornado was an intense tornado that struck Dade County, Florida, on April 5, 1925. It remains the deadliest tornado to affect the South Florida county, and it is estimated to have been the most intense tornado to strike the Miami area. The tornado caused five deaths and produced damage totals that were estimated near $200–300,000 (1925 USD). 35 people were also hospitalized because of injuries. The tornado remains the only tornado to cause multiple fatalities in Dade County. While officially unrated, it is estimated that the tornado likely produced F3-level damage based on photographs taken after the passage of the supercell.
The tornado outbreak sequence of June 3–11, 2008 was a series of tornado outbreaks affecting most of central and eastern North America from June 3–11, 2008. 192 tornadoes were confirmed, along with widespread straight–line wind wind damage. Seven people were killed from a direct result of tornadoes; four in Iowa, two in Kansas, and one in Indiana. Eleven additional people were killed across five states by other weather events including lightning, flash flooding, and straight-line winds. Severe flooding was also reported in much of Indiana, Wisconsin, Minnesota and Iowa as a result of the same thunderstorms, while high heat and humidity affected much of eastern North America; particularly along the eastern seaboard of the United States from New York City to the Carolinas.
The 2006 Westchester County tornado was the strongest and largest tornado in Westchester County, New York since the 1904 Chappaqua tornado. It touched down there on Wednesday, July 12, 2006, and traveled 13 miles (21 km) into southwestern Connecticut during a 33-minute span through two states. The tornado touched down at 3:30 p.m. EDT (19:30 UTC) on the shore of the Hudson River before becoming a waterspout and traveling 3 mi (5 km) across the river. Coming ashore, the tornado entered Westchester County and struck the town of Sleepy Hollow at F1 intensity. After passing through the town, it intensified into an F2 tornado and grew to almost a one-quarter mile (400 m) in diameter. The tornado continued through the county, damaging numerous structures, until it crossed into Connecticut at 4:01 p.m. EDT (20:01 UTC). Not long after entering the state, it dissipated in the town of Greenwich at 4:03 p.m. EDT (20:03 UTC). When the tornado entered Westchester County, it was the eighth known tornado to either touch down or enter the county since 1950.
The November 2008 Carolinas tornado outbreak was a brief but deadly tornado outbreak which began shortly after midnight, while many people were sleeping. Most of the eight tornadoes that touched down were produced by two supercell thunderstorms over North Carolina. At 12:25 a.m. EST, the National Weather Service issued a tornado watch for most of eastern North Carolina as the risk of tornadoes increased. Not long after, the first tornado of the outbreak, an EF2, touched down in South Carolina. Almost an hour later, the second tornado touched down in Robeson County, North Carolina. Three other minor tornadoes, two EF0 and an EF1, touched down over the next two hours. Around 3:10 a.m. EST, the first of two killer tornadoes touched down near Kenly, North Carolina. The EF2 tornado destroyed a few homes and damaged several others. Roughly 20 minutes later, an EF3 tornado touched down in Wilson County. This tornado killed one person and injured a few others after destroying several homes. Total damages from the outbreak amounted to $2.5 million, about half of which was a result of the EF3 tornado.
The 1900 Westchester County tornado was an intense, but short-lived tornado that caused significant damage near the city of New Rochelle, New York.
The 1953 Worcester tornado was an extremely powerful and destructive tornado that struck the city of Worcester, Massachusetts and surrounding areas on Tuesday, June 9, 1953. It was part of the Flint–Worcester tornado outbreak sequence, which occurred over a three-day period from June 6–9, 1953. The storm stayed on the ground for nearly 90 minutes, traveling 48 miles across Central Massachusetts. In total, 94 people were killed, making it the 21st deadliest tornado in the history of the United States, and the deadliest in the history of New England. In addition to the fatalities, nearly 1,300 people were injured and 4,000 buildings were damaged. The tornado caused $52 million in damage. After the Fujita scale was developed in 1971, the storm was classified as F4, the second highest rating on the scale.
This page documents notable tornadoes and tornado outbreaks worldwide in 2022. Strong and destructive tornadoes form most frequently in the United States, Argentina, Brazil, Bangladesh, and Eastern India, but can occur almost anywhere under the right conditions. Tornadoes also develop occasionally in southern Canada during the Northern Hemisphere's summer and somewhat regularly at other times of the year across Europe, Asia, Argentina, Australia and New Zealand. Tornadic events are often accompanied by other forms of severe weather, including strong thunderstorms, strong winds, and hail.
