What is cyclone?

  • (noun): A violent rotating windstorm.
    See also — Additional definitions below


In meteorology, a cyclone is an area of closed, circular fluid motion rotating in the same direction as the Earth. This is usually characterized by inward spiraling winds that rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere of the Earth. Most large-scale cyclonic circulations are centered on areas of low atmospheric pressure. The largest low-pressure systems are cold-core polar cyclones and extratropical cyclones which lie on the synoptic scale. According to NHC glossary, warm-core cyclones such as tropical cyclones and subtropical cyclones also lies within synoptic scale. Mesocyclones, tornadoes and dust devils lie within the smaller mesoscale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the Tropical Upper Tropospheric Trough during the summer months in the Northern Hemisphere. Cyclones have also been seen on extraterrestrial planets, such as Mars and Neptune. Cyclogenesis describes the process of cyclone formation and intensification. Extratropical cyclones form as waves in large regions of enhanced mid-latitude temperature contrasts called baroclinic zones. These zones contract to form weather fronts as the cyclonic circulation closes and intensifies. Later in their life cycle, cyclones occlude as cold core systems. A cyclone's track is guided over the course of its 2 to 6 day life cycle by the steering flow of the cancer or subtropical jet stream.

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Some articles on cyclone:

2012 Pacific Typhoon Season - See Also
... Tropical cyclones portal List of Pacific typhoon seasons 2012 Pacific hurricane season 2012 Atlantic hurricane season 2012 North Indian Ocean cyclone season South-West ...
Winnipeg Cyclone
... The Winnipeg Cyclone was a professional basketball club based in Winnipeg, Manitoba that competed in the International Basketball Association beginning in the 1995-1996 season ... The Cyclone played its home games at the Winnipeg Convention Centre (dubbed the "Wind Tunnel") ... The Cyclone had several recognizable names on the coaching and playing rosters including former NBA star Darryl Dawkins as coach, "Hoop Dreams" subject Arthur Agee, and Andrell Hoard ...
2008 Yemen Cyclone
... Depression ARB 02 (IMD designation ARB 02, JTWC designation 03A, also known as the 2008 Yemen cyclone) was the sixth tropical cyclone of the 2008 North Indian Ocean cyclone season ... A weak tropical cyclone, it caused extensive damage in Yemen, and minor damage in Oman and Somalia ...
Cyclone - Other Planets
... Cyclones are not unique to Earth ... Cyclonic storms are common on Jovian planets, such as the Small Dark Spot on Neptune ...
2009–10 South-West Indian Ocean Cyclone Season
... The 2009–10 South-West Indian Ocean tropical cyclone year officially started on July 1, 2009, and ended on June 30, 2010, after incorporating the tropical cyclone season ... Meteorological Center on La Reunion Island however they delegate the naming of Cyclones to the Meteorological services of Mauritius and Madagascar ... probability of a named storm forming in November was justified when Tropical Cyclone Anja formed on November 14 ...

More definitions of "cyclone":

  • (noun): (meteorology) rapid inward circulation of air masses about a low-pressure center; circling counterclockwise in the northern hemisphere and clockwise in the southern.