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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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Selected article

Allison at peak intensity
Tropical Storm Allison was a tropical storm that devastated southeast Texas in June of the 2001 Atlantic hurricane season. The first storm of the season, Allison had an unusually long path for a June storm, which extended from Texas to the Mid-Atlantic states. Allison was also the first storm since Tropical Storm Frances in 1998 to strike the upper Texas coastline.[1]

The storm dropped heavy rainfall along its path, peaking at over 40 inches (1000 mm) in Texas. The worst of the flooding occurred in Houston, where nearly $5 billion (2001 USD) in damage occurred. There, 30,000 became homeless after the flooding destroyed 2,744 homes. 23 people died in Texas.

Throughout its entire path, Allison caused $5.5 billion (2001 USD) in damage and 41 deaths. Aside from Texas, the places worst hit were Louisiana and southeastern Pennsylvania. Allison is the only tropical storm to have its name retired without ever reaching hurricane strength.

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Selected picture

Typhoon Yuri eye.jpg

This photograph shows the bowl-shaped eye of Typhoon Yuri in the western Pacific Ocean just west of the Northern Mariana Islands. The eye wall descends almost to the sea surface, a distance of nearly 45,000 feet (13 800 meters). In this case the eye is filled with clouds, but in many cases the sea surface can be seen through the eye. Yuri grew to super typhoon status, packing maximum sustained winds estimated at 165 miles per hour (270 km/h). The storm moved west toward the Philippines before turning northeast into the north Pacific Ocean, thus avoiding any major landmass.


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


Did you know…

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Tropical cyclone anniversaries

Hurricane Ismael 14 sept 1995 2016Z big.jpg
  • September 15, 1995 - Hurricane Ismael (pictured) made landfall in the state of Sinaloa, Mexico as a minimal hurricane. Ismael killed 116 people and caused $26 million of damage.
1928 Okeechobee hurricane track.png
Hurricane Jeanne 25 sept 1615Z full.jpg
  • September 17, 2004 - Hurricane Jeanne (pictured) passed over Hispaniola, bringing heavy rain to the island. The rains caused severe flooding in Haiti, killing over 3,000 people.
1926 Miami hurricane track.png
  • September 18, 1926 - The 1926 Miami Hurricane (track pictured) made landfall just to the south of Miami, devastating the city.
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Things you can do

  1. ^ John P. Ivey (2002). "Flood Safety and Tropical Storm Allison". Retrieved 2006-05-15. 

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