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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was the costliest and one of the deadliest hurricanes
in the history of the United States
. It was the eleventh named storm, fifth hurricane, third major hurricane, and second Category 5 hurricane
of the 2005 Atlantic hurricane season
, and was the sixth-strongest Atlantic hurricane
Katrina formed over the Bahamas on August 23, 2005, and crossed southern Florida as a moderate Category 1 hurricane before strengthening rapidly in the Gulf of Mexico and becoming one of the strongest hurricanes ever recorded in the Gulf. The storm weakened considerably before making its second landfall as a Category 3 storm on the morning of August 29 in southeast Louisiana.
It is possible that Katrina was the largest hurricane of its strength to approach the United States in recorded history; its sheer size caused devastation over 100 miles from the center. The storm surge caused major or catastrophic damage along the coastlines of Louisiana, Mississippi, and Alabama, including the cities of Mobile, Alabama, Biloxi and Gulfport, Mississippi, and Slidell, Louisiana. Levees separating Lake Pontchartrain from New Orleans, Louisiana were breached by the surge, ultimately flooding roughly 80% of the city and many areas of neighboring parishes. Severe wind damage was reported well inland. Katrina is estimated to be responsible for $75 billion (2005 US dollars) in damages, making it the costliest hurricane in U.S. history. The storm has killed at least 1,604 people, making it the deadliest U.S. hurricane since the 1928 Okeechobee Hurricane.
Recently featured: List of storms in the 2005 Atlantic hurricane season – List of New Jersey hurricanes – Hurricane Claudette (2003) – Browse
Currently active tropical cyclones
Tropical cyclone anniversaries
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- 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...
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...
CNN Explains: Tropical cyclones
CNN Meteorologist Ivan Cabrera explains what a tropical cyclone is and why they are a necessary evil.
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...
Phases of a Tropical Cyclone
An animated presentation explaining the weather conditions at different phases of a tropical cyclone.
Severe Tropical Cyclone Yasi in Townsville 2 February 2011 Part 2
This is part 2, the morning after YASI struck Townsville and Northern Qld. There was a fair bit of tree damage and some structural damage to fences and some ...
Anatomy of a Tropical Cyclone
Learn more about what tropical cyclones are, how they look, and what makes them grow or weaken. http://www.screenr.com/RhBH.
How cyclones form
Tropical Cyclone POV - A WORLDS FIRST waterslide at Center Parcs [HD]
A new ProSlide waterslide has opened at Center Parcs Elveden Forest - Tropical Cyclone. Sliders will garner speeds of upto 30mph, on a journey spanning over ...
Tropical Cyclones: Educational Modules in the Atmospheric Sciences
Contribution by John S. Snook; John V. Zapotocny, and Donald R. Johnson. Produced by the Space Science and Engineering Center, University of Wisconsin-Madiso...
Thu, 13 Nov 2014 03:10:27 -0800
Cyclone Maria (green dots) lines up to cross over the cold water wake of cyclone Katia (orange dots) during September 2011. The sea surface temperature cooling caused by Katia (represented by bright blue) reduced the intensity of Maria. Such …more.
The Weather Channel
Thu, 20 Nov 2014 07:00:00 -0800
NASA's Earth Observatory just released an awe-inspiring photo (in the slideshow above) that shows just why so many Floridians are at risk to tropical cyclones and global sea level rise. The photo, taken by astronauts aboard the International Space ...
Thu, 06 Nov 2014 01:47:12 -0800
Impact Forecasting, the catastrophe model development center of excellence at Aon Benfield, released the latest edition of its monthly Global Catastrophe Recap report, which reviews the natural disaster perils that occurred worldwide during October 2014.
Mon, 10 Nov 2014 04:13:49 -0800
However, the Mediterranean sea is warm when compared to other regions in the world and this helps in fuelling this region's cyclones through convection. Similar to tropical cyclones, Mediterranean cyclones require minimal wind shear (a difference in ...
eNews Park Forest
Mon, 24 Nov 2014 10:11:15 -0800
NOAA's seasonal hurricane outlook called for four to seven tropical cyclones to affect the central Pacific this season. The most notable storm was major Hurricane Iselle, which hit the Big Island of Hawaii in early August as a tropical storm, and was ...
Times of Oman
Tue, 28 Oct 2014 18:34:46 -0700
The WMO website says tropical cyclones/hurricanes are named neither after any particular person, nor with any preference in alphabetical sequence. The tropical cyclone/hurricane names selected are those that are familiar to the people in each region.
Tue, 25 Nov 2014 06:38:09 -0800
Source: National Hurricane Center. Atlantic Ocean, Caribbean Sea and Gulf of Mexico: There are no tropical cyclones at this time and nothing is expected to develop in the next 48 hours. Eastern Pacific Ocean: There are no tropical cyclones at this time.
Sun, 26 Oct 2014 20:56:15 -0700
Permanent secretary for Infrastructure and Transport, Commander Francis Kean said while the tropical cyclones were predictions only, it was critical that communities across Fiji acted responsibly and paid close attention to all weather updates issued ...
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