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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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Hurricane Andrew.jpg

Hurricane Andrew was one of the most destructive hurricanes ever to hit the United States. It raged from August 16 to August 28 during the 1992 Atlantic hurricane season, impacting the northwestern Bahamas, southern Florida in the greater Miami area, and south-central Louisiana. Andrew caused $45 billion (2005 US dollars) in damages (mostly in south Florida) and is the second most expensive hurricane in history (behind Katrina of the 2005 season).

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Hurricane structure graphic.jpg

Surrounding the eye of the hurricane is a ring of thunderstorms, called the eyewall. Rainbands surround the eye of the storm in concentric circles. In the eyewall and in the rainbands, warm, moist air rises, while in the eye and around the rainbands, air from higher in the atmosphere sinks back toward the surface. The rising air cools, and water vapor in the air condenses into rain. Sinking air warms and dries, creating a calm, cloud-free area in the eye.


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.




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Did you know…

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Tropical cyclone anniversaries

Cyclone Percy 2005.jpg
  • March 3, 1982 - Cyclone Isaac (pictured) impacted Tonga, killing 6 people and rendering 45,000 homeless.
Vincent mar 3 1990 0620Z.jpg
STS Diwa 2006.jpg
TC Steve 07 mar 2000 0240Z.jpg

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Portal:Tropical_cyclones — Please support Wikipedia.
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12307 news items

The Guardian

The Guardian
Wed, 18 Feb 2015 16:59:06 -0800

A Bureau of Meteorology map on Thursday morning. Parts of Northern Territory and Queensland are preparing for the approach of tropical cyclones Lam and Marcia. Photograph: Australian Government Bureau of Meteorology/courtesy of Japan ...

The Guardian

The Guardian
Thu, 19 Feb 2015 15:15:00 -0800

Tropical cyclones Marcia and Lam: your photos and experiences. As severe tropical cyclone Marcia lashes the east coast of Australia, we want to see your stories. Share your pictures and videos of the wild weather, and stay safe at all times. Surfers ...
Tue, 24 Feb 2015 05:41:15 -0800

One major pineapple farming company, which also grows mangoes, has managed to escape the devastation of Tropical Cyclone Marcia, which ravaged Yeppoon, Rockhampton and Bundaberg in Central Southern Queensland, and Tropical Cyclone Lam, ...

National Geographic

National Geographic
Tue, 24 Feb 2015 12:59:42 -0800

Hurricanes, cyclones, and typhoons—collectively known as tropical cyclones—all require storm clouds, surface ocean temperatures above 80°F (27°C), and very little wind shear. Getting all three ingredients together to generate one hurricane or cyclone ...
Fiji Times
Mon, 09 Feb 2015 12:15:00 -0800

THE Fiji Meteorological Service (FMS) has projected lesser tropical cyclones in Fiji and the Pacific but these will be more intense in power. During her presentation at the Climate Change and Health Adaptation Symposium, FMS scientific officer Arieta ...

Business Insider

Business Insider
Thu, 19 Feb 2015 15:37:30 -0800

Australia is on the verge of being pummeled by not one, but two powerful cyclones in a rare double-whammy by Mother Nature. Cyclone Lam made landfall in the Northern Territory as a Category 4 storm around 2 a.m. Friday morning local time. And Cyclone ...
Yahoo7 News
Tue, 03 Mar 2015 16:33:45 -0800

Tropical cyclones are common in far north Queensland, but many people in Cairns believe the city is immune from a Mahina-style cyclone. But cyclone researcher Jon Nott, of James Cook University and a resident of Cairns for 15 years, says another Mahina ...
Wide Format Online
Mon, 23 Feb 2015 19:45:00 -0800

Roland DG would like to extend its thoughts and best wishes to those who have been affected by the recent tropical cyclones in Queensland and Northern Territory. We would like to let you know that we are here to assist, and provide the following ...

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