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.
The May 2009 Southern Midwest Derecho was an extreme progressive derecho and mesoscale convective vortex (MCV) event that struck southeastern Kansas, southern Missouri, and southwestern Illinois on May 8, 2009. Thirty-nine tornadoes, including two of EF3 strength on the Enhanced Fujita Scale, were reported in addition to high non-tornadic winds associated with the derecho and MCV. Due to the abnormal shape of the storm on radar and the extremely strong winds, many called this an "inland hurricane." A new class of storm, the Super Derecho, has been used to describe this event after analysis in 2010. Embedded supercells produced hail up to baseball size in southern Missouri, a rare event in a derecho. A wind gust of 106 mph (171 km/h) was recorded by a backup anemometer at the Southern Illinois Airport after official National Weather Service equipment failed. This derecho was the last of a series of derechos that occurred at the beginning of May. (Full article...)
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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 in November and December 2011. Based on the 1991–2010 averaging period, 58 tornadoes occur across the United States throughout November, while 24 more occur in December.

Similar to the prior months, November and December remained slightly below average with 46 and 15 tornadoes respectively. However, a couple days in November saw heightened periods of activity. Oklahoma recorded its first violent November tornado since modern records began in 1950, an EF4 in Tillman County on November 7. Twenty tornadoes struck the South on November 16, including a long-track EF2 tornado in parts of Alabama and Georgia and two additional EF2 tornadoes that resulted in five fatalities in the Carolinas. December activity was confined to three consecutive days towards the end of the month, the highlight being a 13-tornado event primarily in Alabama and Georgia on December 22. Floyd County, Georgia was struck by EF2 and EF3 tornadoes, both of which caused considerable damage. (Full article...)
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An F5 tornado touched down on June 16, 1992, near Chandler, Minnesota. The tornado killed one person, destroyed 75 homes, and damaged over 100 other structures.

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Map of all tornadoes in the United States during 1999

This page documents the tornadoes and tornado outbreaks of 1999, 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 Northern Hemisphere's summer season, as well as Europe. One particular event, the Bridge Creek-Moore, Oklahoma F5 tornado, produced the highest wind speed ever recorded on Earth, which was 301 ± 20 mph (484 ± 32 km/h).

(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

Tornado anniversaries

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.

April 29

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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.

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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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.

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