Portal:Tropical cyclones
The Tropical Cyclones Portal
A tropical cyclone is a storm system characterized by a large low-pressure center, a closed low-level circulation and a spiral arrangement of numerous thunderstorms that produce strong winds and heavy rainfall. Tropical cyclones feed on the heat released when moist air rises, resulting in condensation of water vapor contained in the moist air. They are fueled by a different heat mechanism than other cyclonic windstorms such as Nor'easters, European windstorms and polar lows, leading to their classification as "warm core" storm systems. Most tropical cyclones originate in the doldrums, approximately ten degrees from the Equator.
The term "tropical" refers to both the geographic origin of these systems, which form almost exclusively in tropical regions of the globe, as well as to their formation in maritime tropical air masses. The term "cyclone" refers to such storms' cyclonic nature, with anticlockwise rotation in the Northern Hemisphere and clockwise rotation in the Southern Hemisphere. Depending on its location and intensity, a tropical cyclone may be referred to by names such as "hurricane", "typhoon", "tropical storm", "cyclonic storm", "tropical depression" or simply "cyclone".
Types of cyclone: 1. A "Typhoon" is a tropical cyclone located in the North-west Pacific Ocean which has the most cyclonic activity and storms occur year-round. 2. A "Hurricane" is also a tropical cyclone located at the North Atlantic Ocean or North-east Pacific Ocean which have an average storm activity and storms typically form between May 15 and November 30. 3. A "Cyclone" is a tropical cyclone that occurs in the South Pacific and Indian Oceans.
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Hurricane Sandy (unofficially referred to as Superstorm Sandy) was an extremely large and destructive Category 3 Atlantic hurricane which ravaged the Caribbean and the coastal Mid-Atlantic region of the United States in late October 2012. It was the largest Atlantic hurricane on record as measured by diameter, with tropical-storm-force winds spanning 1,150 miles (1,850 km). The storm inflicted nearly $70 billion USD in damage (equivalent to $93 billion in 2023), and killed 233 people in eight countries, from the Caribbean to Canada. The eighteenth named storm, tenth hurricane, and second major hurricane of the 2012 Atlantic hurricane season, Sandy was a Category 3 storm at its peak intensity when it made landfall in Cuba, though most of the damage it caused was after it became a Category 1-equivalent extratropical cyclone off the coast of the Northeastern United States.
Sandy developed from a tropical wave in the western Caribbean Sea on October 22, quickly strengthened, and was upgraded to Tropical Storm Sandy six hours later. Sandy moved slowly northward toward the Greater Antilles and gradually intensified. On October 24, Sandy became a hurricane, made landfall near Kingston, Jamaica, re-emerged a few hours later into the Caribbean Sea and strengthened into a Category 2 hurricane. On October 25, Sandy hit Cuba as a Category 3 hurricane, then weakened to a Category 1 hurricane. Early on October 26, Sandy moved through the Bahamas. On October 27, Sandy briefly weakened to a tropical storm and then strengthened back to a Category 1 hurricane. Early on October 29, Sandy curved west-northwest (the "left turn" or "left hook") and then moved ashore near Brigantine, New Jersey, just to the northeast of Atlantic City, as a post-tropical cyclone with hurricane-force winds. Sandy continued drifting inland for another few days while gradually weakening, until it was absorbed by another approaching extratropical storm on November 2. (Full article...)Selected article -
As the center of Hurricane Katrina passed southeast of New Orleans on August 29, 2005, winds downtown were in the Category 1 range with frequent intense gusts. The storm surge caused approximately 23 breaches in the drainage canal and navigational canal levees and flood walls. As mandated in the Flood Control Act of 1965, responsibility for the design and construction of the city’s levees belongs to the United States Army Corps of Engineers and responsibility for their maintenance belongs to the Orleans Levee Board. The failures of levees and flood walls during Katrina are considered by experts to be the worst engineering disaster in the history of the United States. By August 31, 2005, 80% of New Orleans was flooded, with some parts under 15 feet (4.6 m) of water. The famous French Quarter and Garden District escaped flooding because those areas are above sea level. The major breaches included the 17th Street Canal levee, the Industrial Canal levee, and the London Avenue Canal flood wall. These breaches caused the majority of the flooding, according to a June 2007 report by the American Society of Civil Engineers. The flood disaster halted oil production and refining which increased oil prices worldwide.
Between 80 and 90 percent of the residents of New Orleans were evacuated before the hurricane struck, testifying to some of the success of the evacuation measures. Despite this, many remained in the city, mainly those who did not have access to personal vehicles or who were isolated from the dissemination of news from the local governments. The Louisiana Superdome was used to house and support some of those who were unable to evacuate. Television shots frequently focused on the Superdome as a symbol of the flooding occurring in New Orleans. (Full article...)Selected image -
Selected season -
The 2003 Atlantic hurricane season was a very active season with tropical cyclogenesis occurring before and after the official bounds of the season—the first such occurrence since the 1970 season. The season produced 21 tropical cyclones, of which 16 developed into named storms; seven of those attained hurricane status, of which three reached major hurricane status. The strongest hurricane of the season was Hurricane Isabel, which reached Category 5 status on the Saffir–Simpson hurricane scale northeast of the Lesser Antilles; Isabel later struck North Carolina as a Category 2 hurricane, causing $3.6 billion in damage (2003 USD) and a total of 51 deaths across the Mid-Atlantic region of the United States.
Although the bounds of the season are typically from June 1 to November 30, the season began early with the formation of Subtropical Storm Ana on April 20, and it ended relatively late on December 11 with the dissipation of Tropical Storm Peter. In early September, Hurricane Fabian struck Bermuda as a Category 3 hurricane, where it was the worst hurricane since 1926; on the island it caused four deaths and $300 million in damage (2003 USD). Hurricane Juan caused considerable destruction to Nova Scotia, particularly Halifax, as a Category 2 hurricane, the first hurricane of significant strength to hit the province since 1893. Additionally, Hurricanes Claudette and Erika struck Texas and Mexico, respectively, as minimal hurricanes. In December, Tropical Storm Odette struck the Dominican Republic, and Tropical Storm Peter formed in the eastern portion of the basin. (Full article...)Related portals
Currently active tropical cyclones
Italicized basins are unofficial.
- North Atlantic (2024)
- No active systems
- East and Central Pacific (2024)
- No active systems
- West Pacific (2024)
- No active systems
- North Indian Ocean (2024)
- No active systems
- Mediterranean (2023–24)
- No active systems
- South-West Indian Ocean (2023–24)
- No active systems
- Australian region (2023–24)
- No active systems
- South Pacific (2023–24)
- No active systems
- South Atlantic (2023–24)
- No active systems
Last updated: 21:54, 8 May 2024 (UTC)
Tropical cyclone anniversaries
May 8
- 2003 - Cyclone Manou reached its peak intensity in the Indian Ocean with a central pressure of 967 hPa (mbar). Manou killed 70 people in Madagascar.
- 2017 - Cyclone Donna (pictured) attained peak intensity in the South Pacific Ocean, with peak 10 minute winds of 205 km/h (125 mph); this made it the strongest ever recorded Southern Hemisphere tropical cyclone in the month of May.
May 9
- 1961 - A cyclone struck what is now Bangladesh, killing 11,468 people.
- 1968 - A cyclone struck Myanmar, killing 1,049 people.
- 1990 - A powerful tropical cyclone (pictured) struck Andhra Pradesh in southeastern India. The cyclone killed a total of 967 people and damaged about US$600 million.
May 10
- 1972 - Cyclone Hannah impacts Papua New Guinea as a weak cyclone.
- 2002 - The 2002 Oman cyclone made landfall in Oman, bringing up to 250 mm (9.8 in) of rain.
- 2015 - Typhoon Noul (pictured) made landfall over in Santa Ana, Cagayan at Category 5 typhoon intensity.
Did you know…
- …that the Joint Typhoon Warning Center considers that Typhoon Vera (pictured) of 1986 is actually two distinct systems, formed from two separated low-level circulations?
- …that Hurricane Agatha (pictured) was the strongest Pacific hurricane to make landfall in Mexico in May since records began in 1949?
- …that Cyclone Raquel (track pictured) travelled between the Australian and South Pacific basins between the 2014–15 and 2015–16 seasons, spanning both seasons in both basins?
- …that Cyclone Amphan (pictured) in 2020 was the first storm to be classified as a Super Cyclonic Storm in the Bay of Bengal since 1999?
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Within the Pacific Ocean, the name of any significant tropical cyclone can be retired from the tropical cyclone naming lists by the World Meteorological Organization if it concludes that a storm was so deadly or damaging that any future use of that name would be inappropriate. Storm names can also be retired for other reasons, such as being deemed politically insensitive. Within the Eastern Pacific and Central Pacific basins (between 140°W and the western coast of North America and between the International Date Line (180°) and 140°W, respectively, and north of the Equator), a total of 21 names have been retired from the official lists. The deadliest system to have its name retired was Hurricane Pauline, which caused over 230 fatalities when it struck Mexico during October 1997, while the costliest hurricane was Hurricane Otis which caused an economic impact of over $12 billion in October 2023. Dora and Otis were the most recent Pacific tropical cyclones to have their names retired. (Full article...)
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Related WikiProjects
WikiProject Tropical cyclones is the central point of coordination for Wikipedia's coverage of tropical cyclones. Feel free to help!
WikiProject Weather is the main center point of coordination for Wikipedia's coverage of meteorology in general, and the parent project of WikiProject Tropical cyclones. Three other branches of WikiProject Weather in particular share significant overlaps with WikiProject Tropical cyclones:
- The Non-tropical storms task force coordinates most of Wikipedia's coverage on extratropical cyclones, which tropical cyclones often transition into near the end of their lifespan.
- The Floods task force takes on the scope of flooding events all over the world, with rainfall from tropical cyclones a significant factor in many of them.
- WikiProject Severe weather documents the effects of extreme weather such as tornadoes, which landfalling tropical cyclones can produce.
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