Portal:Tornadoes

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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.
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The tornado near peak intensity

The 1999 Bridge Creek–Moore tornado (locally referred to as the May 3 tornado) was a large and exceptionally powerful F5 tornado in which the highest wind speeds ever measured globally were recorded at 301 ± 20 miles per hour (484 ± 32 km/h) by a Doppler on Wheels (DOW) radar. Considered the strongest tornado ever recorded to have affected the metropolitan area, the tornado while near peak intensity devastated southern portions of Oklahoma City, Oklahoma, United States, along with surrounding suburbs and towns to the south and southwest of the city during the early evening of Monday, May 3, 1999. Due to the unavailability of direct measurements and remotely sensed tornado wind speeds at ground level, damage surveying has been the primary approach for estimating tornado strength. Tornado outbreaks in the United States have serious consequences for people's lives and properties. Tornado outbreaks are sequences of six or more tornadoes rated F1 or greater on the Fujita scale or EF1 or greater on the Enhanced Fujita scale that occur in close succession. 

Parts of Bridge Creek were rendered unrecognizable. The tornado covered 38 miles (61 km) during its 85-minute existence, destroying thousands of homes, killing 36 people (plus an additional five indirectly), and leaving US$1 billion (1999 USD) in damage, ranking it as the fifth-costliest on record not accounting for inflation. Its severity prompted the first-ever use of the tornado emergency statement by the National Weather Service.
The tornado first touched down at 6:23 p.m. Central Daylight Time (CDT) in Grady County, roughly two miles (3.2 km) south-southwest of the town of Amber. It quickly intensified into a violent F4, and gradually reached F5 status after traveling 6.5 miles (10.5 km), at which time it struck the town of Bridge Creek. It fluctuated in strength, ranging from F2 to F5 status before it crossed into Cleveland County where it reached F5 intensity for a third time shortly before entering the city of Moore. By 7:30 p.m., the tornado crossed into Oklahoma County and battered southeastern Oklahoma City, Del City, and Midwest City before dissipating around 7:48 p.m. just outside Midwest City. A total of 8,132 homes, 1,041 apartments, 260 businesses, eleven public buildings, and seven churches were damaged or destroyed. (Full article...)
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A tornado near Turkey, Texas on March 28, 2007

The tornado outbreak of March 28–31, 2007, also known as the Late-March 2007 tornado outbreak, was a tornado outbreak that took place across the central United States. It developed in the High Plains from South Dakota to central Texas on March 28, 2007, which produced most of the tornadoes. Several more tornadoes were reported the next three days before the system weakened on March 31. It affected western Nebraska, western Kansas, extreme eastern Colorado, and much of Oklahoma, and Texas. It was the second major outbreak of 2007, four weeks after an outbreak farther east. The outbreak produced 80 confirmed tornadoes, with five deaths and extensive damage being reported. In addition to the tornadoes, widespread hail as large as softballs and destructive straight-line winds as strong as 90 mph (140 km/h) were reported.

The activity level was very uncertain for March 29, as it was conditional on the dry line refiring. Despite the squall line remaining intact, several more tornadoes developed. Several more tornadoes developed on March 30 and 31 before the system weakened. (Full article...)
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An EF3 tornado near Washburn, Illinois, on February 28, 2017.
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Tornado tracks of 1958.

This page documents the tornadoes and tornado outbreaks of 1958, 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
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Recent tornado outbreaks

Recent tornado outbreaks

July

  • July 1
A violent EF4 tornado hits Mountain View County, Alberta, Canada, becoming only the third EF4 tornado in the province's history. (Northern Tornadoes Project)
  • July 12–13
Several tornadoes occur in the Midwestern United States and Central Canada, including an EF1 tornado that passed through the suburbs of Chicago. (NWSChicago)
  • July 16
A rare EF1 tornado touches down in Aguada, Puerto Rico, significantly damaging two houses. (Iowa State University)


Previous months: June, May

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Tornado anniversaries

April 26

April 27

  • 1942 – An F4 tornado destroyed about a third of Pryor, Oklahoma, killing 52 people. Many of the homes destroyed had been hastily built during the town's wartime expansion.
  • 2011 – The peak of the 2011 Super Outbreak saw 216 tornadoes produced in 24 hours across the Southeastern United States. Four EF5s and eleven EF4s were among the tornadoes that devastated parts of Mississippi, Alabama, Tennessee, and Georgia. The death toll on April 27 was 319. For the entire outbreak, 360 tornadoes occurred over four days, resulting in 324 fatalities.

April 28

  • 1893 – An F4 tornado severely damaged or destroyed every building in Cisco, Texas, killing at least 23 people. Half of the town's population was left with no shelter of any kind and 43 of the 45 businesses in town were destroyed. An entire train was thrown 80–200 feet (24–61 m) from the tracks.
  • 1950 – Strong tornadoes killed 11 people in Oklahoma and Texas. Five died as an F4 tornado swept away two homes near Clyde, Texas. A refrigerator was carried half a mile (0.8 km) and stuck on top of a telephone pole. Another F4 tornado killed five people as it devastated Holdenville, Oklahoma. One other person died near Lone Wolf, Oklahoma.
  • 2002 – Part of a larger outbreak, a rare F4 tornado hit La Plata, Maryland, killing three people and inuring more than 100. The tornado was initially rated F5, but it was downgraded after the swept-away houses were found to have been very poorly anchored. A report on this tornado led to the creation of a "Quick Response Team" for assessing damage from potential F4 and F5 tornadoes.
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Did you know…

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

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Hailstones dropped during the storm, compared to a cricket ball (7 cm or 2.8 in diameter)

The 1999 Sydney hailstorm was the costliest natural disaster in Australian insurance history, causing extensive damage along the east coast of New South Wales. The storm developed south of Sydney on the afternoon of Wednesday, 14 April 1999, and struck the city's eastern suburbs, including the central business district, later that evening.

The storm dropped an estimated 500,000 tonnes of hailstones in its path. The insured damage bill caused by the storm was over A$1.7 billion (equivalent to $3.8 billion in 2022), with the total bill (including uninsured damage) estimated to be around $2.3 billion. It was the costliest single natural disaster in Australian history in insured damage, surpassing the $1.1 billion in insured damage caused by the 1989 Newcastle earthquake. Lightning also claimed one life during the storm, and the event caused approximately 50 injuries. (Full article...)

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Related WikiProjects

The scope of WikiProject Severe weather is to write articles about severe weather, namely thunderstorms and tornadoes. Their talk page is located here.

WikiProject Weather is the main hub for all articles that are weather-related. WikiProject Weather strives to improve articles in a variety of weather topics, including Tropical Cyclones, Severe Weather, General meteorology, Non-tropical Storms, Climate, Floods, Droughts and wildfires, Meteorological instruments and data, Meteorological Biographies, and Space Weather. If you would like to help, please visit the project talk page.

WikiProject Meteorology is a collaborative effort by dozens of Wikipedians to improve the quality of meteorology- and weather-related articles. If you would like to help, visit the project talk page, and see what needs doing. The project is currently being merged into WikiProject Weather.

WikiProject Tropical cyclones is a daughter project of WikiProject meteorology. The dozens of semi-active members and several full-time members focus on improving Wikipedia's coverage of tropical cyclones.

Wikipedia is a fully collaborative effort by volunteers. So if you see something you think you can improve, be bold and get to editing! We appreciate any help you can provide!

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