Tropical Cyclones Portal
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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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.
Currently active tropical cyclones
Tropical cyclone anniversaries
- March 3, 1982 - Cyclone Isaac (pictured) impacted Tonga, killing 6 people and rendering 45,000 homeless.
Here are some tasks you can do
- Requests: Original-content tropical cyclone articles: 1935 Haiti hurricane, 1926 Havana-Bermuda Hurricane, Typhoon Bilis (2000), more
- Copyedit: Hurricane Elida (2002), Effects of Hurricane Dennis in Florida, Criticism of government response to Hurricane Katrina
- Wikify: Make sure tropical cyclone lists, such as List of Texas hurricanes, have storm articles properly linked
- Cleanup: Hurricane Rita, Hurricane Wilma, Tropical Storm Fay (2002)
- Expand: Indianola Hurricane of 1886, Typhoon Nina (1975), Typhoon Durian
- Stubs: 1931 Belize hurricane, History of tropical cyclone-spawned tornadoes, more...
- Update: Hurricane Stan and Tropical Depression Sixteen (2008)
What are hurricanes, typhoons and tropical cyclones?
What are hurricanes, typhoons and tropical cyclones? How do they form? In this video in the Weatherbytes series, James Chubb explains what hurricanes are and...
CNN Explains: Tropical cyclones
CNN Meteorologist Ivan Cabrera explains what a tropical cyclone is and why they are a necessary evil.
Matric Revision: Geography: Climatology (3/8): Tropical Cyclones
Characteristics, stages and how managed. Series brought to you by Western Cape Education Department FET Curriculum and Communication Directorates in collabor...
Tropical Cyclogenesis- Tropical Cyclone Formation
Learn the basics of tropical cyclones. This video series covers the fundamentals of tropical cyclogenesis. Text Version: http://www.brighthub.com/environment...
Cyclone Ita Hits Australia LIVE : Category 5, 285km/h Winds Deadly Storm Updates
Tropical cyclone threatens northern Australia More than 9000 people in north Queensland will be "directly impacted" by tropical cyclone Ita as the weather h...
Super Hurricanes and Typhoons
Hurricanes, typhoons, tropical cyclones: they are creatures of tropical seas, sweeping up heat laden waters, converting it to wind, rain, and waves. Why do a...
An introduction to tropical cyclones. This video supports the Tirine Geography poster, Tropical Cyclones.
Severe Tropical Cyclone Marcia Chase Yeppoon
Oz Cyclone chasers are on the ground to get footage and data from Category 5 Severe Tropical Cyclone Marcia WARNING COARSE LANGUAGE This action was streamed ...
Mid-Latitude & Tropical Cyclones
Download the Show Notes: http://www.mindset.co.za/learn/sites/files/EasterSchool/LXES_Gr12Geography_02_Mid-Latitude%20&%20Tropical%20Cyclones_24Mar.pdf Xtra ...
Phases of a Tropical Cyclone
An animated presentation explaining the weather conditions at different phases of a tropical cyclone.
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 ...
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, ...
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 ...
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 ...
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 ...
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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