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Portal:Tropical cyclones

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Tropical cyclones portal

Satellite photograph of Typhoon Tip

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 fuelled 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 near the Equator, approximately 10 degrees away.

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".

Pictured: Typhoon Tip
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Allison at peak intensity
Tropical Storm Allison was a tropical storm that devastated southeast Texas in June of the 2001 Atlantic hurricane season. The first storm of the season, Allison had an unusually long path for a June storm, which extended from Texas to the Mid-Atlantic states. Allison was also the first storm since Tropical Storm Frances in 1998 to strike the upper Texas coastline.

The storm dropped heavy rainfall along its path, peaking at over 40 inches (1000 mm) in Texas. The worst of the flooding occurred in Houston, where nearly $5 billion (2001 USD) in damage occurred. There, 30,000 became homeless after the flooding destroyed 2,744 homes. 23 people died in Texas.

Throughout its entire path, Allison caused $5.5 billion (2001 USD) in damage and 41 deaths. Aside from Texas, the places worst hit were Louisiana and southeastern Pennsylvania. Allison is the only tropical storm to have its name retired without ever reaching hurricane strength.

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Hurricane Katrina Eye viewed from Hurricane Hunter.jpg

View of the eyewall of Hurricane Katrina taken on Aug. 28, 2005, as seen from an NOAA WP-3D Orion hurricane hunter aircraft before the storm made landfall on the United States Gulf Coast.

Related WikiProjects

WikiProject Tropical cyclones is the central point of coordination for Wikipedia's coverage of tropical cyclones. Feel free to help!

WikiProject Meteorology is the main center point of coordination for Wikipedia's coverage of meteorology in general.

WikiProject Non-tropical storms is a similar WikiProject which coordinates most of Wikipedia's coverage on notable extratropical cyclones, and the two projects share numerous overlaps.


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Currently active tropical cyclones

Italicized basins are unofficial.

North Atlantic (2021)
No active systems
East and Central Pacific (2021)
Tropical Storm Carlos
West Pacific (2021)
No active systems
North Indian Ocean (2021)
No active systems
Mediterranean (2020–21)
No active systems
South-West Indian Ocean (2020–21)
No active systems
Australian region (2020–21)
No active systems
South Pacific (2020–21)
No active systems
South Atlantic (2020–21)
No active systems

Last updated: 10:14, 13 June 2021 (UTC)

Did you know…

Amphan 2020-05-18 0745Z.jpg
Beryl 2018-07-06 1350Z.jpg
Zeta 2020-10-28 1855Z.jpg

Tropical cyclone anniversaries

Typhoon Chanthu 2004.jpg

June 12,

  • 1997 - Cyclone Keli, the first post-season tropical cyclone to form in June, reaches peak strength while affecting the Pacific Islands.
  • 2004 - Tropical Storm Chanthu (pictured) made landfall in Vietnam, killing seven people. Chanthu caused over 230 mm (9.4 in) of rain.
  • 2014 - Hurricane Cristina reaches peak intensity as a Category 4 major hurricane.
Carlos 2015-06-13 1755Z.jpg

June 13,

Yunya Jun 14 1991 2349Z.jpg

June 14,

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