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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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Hurricane Gloria at New York landfall
Hurricane Gloria was a hurricane during the 1985 Atlantic hurricane season that prowled the Atlantic Ocean from September 16 to September 28, 1985. A Cape Verde-type hurricane, it reached Category 4 intensity on the Saffir–Simpson Hurricane Scale, but weakened significantly by the time it made landfall on North Carolina and on Long Island. Gloria caused extensive damage in the East Coast of the United States, amounting to $1.6 billion (2005 USD), and was responsible for 11 fatalities.

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Agnes2.jpg

Remnants of Hurricane Agnes over the Northeastern United States. Agnes dropped torrential and record-breaking rainfall, causing over $2 billion in damage (1972 USD) and more than 100 deaths. The name was later retired.


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)
No active systems
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: 00:36, 12 April 2021 (UTC)

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Amphan 2020-05-18 0745Z.jpg
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Tropical cyclone anniversaries

Typhoon Sudal 11 apr 2004 0425Z.jpg

April 11,

  • 2003 - Subtropical Storm Luma reaches peak strength as a subtropical storm with winds of 130 km/h (80 mph) in the extremely southern portion of the Indian Ocean basin.
  • 2004 - Typhoon Sudal (pictured) reaches peak strength as a Category 4 super typhoon as it destroyed 90% of crops in Micronesia.
  • 2014 - Cyclone Ita reaches peak strength of 10-minute sustained winds of 215 km/h (130 mph), killing a total of 40 people and damages up to US$1.15 billion.
Veena Apr 12 1983 0122Z.png

April 12,

  • 1983 - Cyclone Veena (pictured) reaches peak strength as a Category 3 cyclone over in the extreme Southeastern Pacific of the basin with a minimum pressure of 925 hPa.
  • 2002 - Cyclone Bonnie reached its peak intensity with 85 km/h (50 mph) winds after passing over Timor island.
The 1991 Angola cyclone

April 13


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