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Tropical Cyclones Portal

Typhoon tip peak.jpg

A tropical cyclone is a storm system characterized by a large low-pressure center and 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. 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, and 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 can 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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The hurricane seen from the International Space Station.

Hurricane Ivan was the ninth named storm, the sixth hurricane, the fourth major hurricane, and the strongest hurricane of the 2004 Atlantic hurricane season. It formed as a Cape Verde-type hurricane in early September. Ivan reached Category 5 strength on the Saffir-Simpson Hurricane Scale, the highest possible category, becoming the ninth most intense Atlantic hurricane on record and the only Category 5 storm of the season.

Ivan caused catastrophic damage to Grenada, which it struck directly at Category 3 intensity, and heavy damage to Jamaica, Grand Cayman, and the western tip of Cuba. After peaking in strength, it tracked north-northwest across the Gulf of Mexico to make landfall as a strong Category 3 storm in the U.S. near Gulf Shores, Alabama, causing very heavy damage. Ivan dropped heavy rains on the Southeastern United States as it looped across Florida and back into the Gulf of Mexico. The remnant low from the storm regenerated into a new tropical system, which moved into Louisiana and Texas, causing minimal damage. Ivan caused an estimated $13 billion worth of damage in the United States, making it the third costliest hurricane to ever strike the U.S (currently fourth).

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Four Southern Hemisphere Tropical Cyclones (2003).jpg

A train of four tropical cyclones is lined up in the southern Indian Ocean east of Madagascar (left) on February 12, 2003. This true-color image of the storms was made from observations collected by alternating passes of the Aqua and Terra satellites. The cyclones pictured are (west to east) Gerry, Hape, 18S, and Fiona of the 2003 Southwest Indian cyclone season. Terra satellite passed over this area in the morning, moving east to west, and contributing the first and third chunks of the image (from right to left). Aqua satellite passed over in the afternoon, also moving east to west, contributing the second and fourth chunks.


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.




Related Portals


Currently active tropical cyclones

North Atlantic (2015)

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East/Central Pacific (2015)

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Northwest Pacific (2015)

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North Indian Ocean (2015)

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South-West Indian Ocean (2014–15)

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Australian region (2014–15)

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South Pacific (2014–15)

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Did you know…

Chris jan 13 1982 0950Z.jpg
Tracks of Atlantic-Pacific crossover storms.png
Hurricane Ida in the Yucatan Channel November 8 2009.jpg

Tropical cyclone anniversaries

Cyclone Wanda's track
Hyacinthe 25 jan 1980 0326Z N6.jpg
Gene 30 jan 2008 1410Z.jpg
  • January 26, 2008 - Cyclone Gene (pictured) develops northeast of Fiji, where it later drops heavy rainfall and causes eight deaths.
  • January 27, 2008 - Cyclone Fame (pictured) makes landfall on the west coast of Madagascar, causing 13 deaths while crossing the island.
ITC Connie 28 jan 2000 0600Z.jpg
  • January 28, 2000 - Cyclone Connie (pictured) reached its peak intensity with a pressure of 928 hPa (mbar), before it struck the islands of Réunion and Mauritius, where it dropped up to 400 mm (15.5 in) of rain.

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Portal:Tropical_cyclones — Please support Wikipedia.
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9610 news items

Fiji Times
Thu, 22 Jan 2015 13:33:45 -0800

WITH a tropical cyclone affecting Tahiti, the Fiji Meteorological Services yesterday afternoon confirmed Fiji remains clear of the cyclone. Acting director Aminiasi Tuidraki told this newspaper the office was monitoring the situation in the Pacific ...

The Weather Channel

The Weather Channel
Tue, 13 Jan 2015 16:02:43 -0800

It also appears this eye exhibits the stadium effect, which is quite common in intense tropical cyclones. Namely, if you were at the surface in the center of the eye looking up, the surrounding eyewall would resemble a stadium's seating, a bowl-shape ...
Solomon Star
Mon, 05 Jan 2015 15:15:00 -0800

NEIGHBOURING Fiji is bracing for a possibility of two tropical cyclones predicted to hit the Island nation between the November to April cyclone season with one possibly reaching category three. And there is a high probability that these cyclones will ...
Fri, 16 Jan 2015 15:00:31 -0800

The 2015 Pacific typhoon season is an ongoing event in the annual cycle of tropical cyclone formation, in which tropical cyclones form in the western Pacific Ocean. The season will run throughout 2015, though most tropical cyclones typically develop ...


Washington Post (blog)
Mon, 04 Aug 2014 09:34:34 -0700

A pair of tropical systems in the eastern Pacific are both following a general path leading towards Hawaii over the next week. Dangerous Hurricane Iselle, packing 140 mph sustained winds, is 1200 miles east of the Big Island and is forecast to sweep ...


Daily Mail
Sun, 18 Jan 2015 08:36:56 -0800

"Wind speeds are changing with height, and tropical cyclones don't like that. They like to have weak wind shear." Mr Bennett said the weather system was not going to cross the coast, but strong gusts of up to 100km/h could hit the sparsely populated ...

Science Codex

The Weather Channel
Thu, 07 Aug 2014 10:26:18 -0700

Tropical cyclones that form in the Atlantic Basin and achieve 74 mph sustained wind speeds or higher are called hurricanes, and they are monitored by the National Hurricane Center. In the Eastern Pacific Basin, which spans from the west coast of North ...

Mail & Guardian Africa

Mail & Guardian Africa
Thu, 22 Jan 2015 06:03:45 -0800

It can also result in an increased frequency of tropical cyclones since these typically form over large bodies of relatively warm water, deriving their energy through the evaporation of water from the ocean surface. A country particularly affected by ...

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