Portal:Tropical cyclones
Tropical cyclones portal
A tropical cyclone is a storm system characterized by a large low-pressure center, a closed low-level circulation and a spiral arrangement of 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. Most 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, as well as to 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 may 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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Typhoon Man-Yi (04W) off the coast of Taiwan, near peak intensity, as seen from the MODIS instrument on NASA's Aqua satellite on July 12, 2007. Man-Yi later weakened and struck Japan, causing three casualties.
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Currently active tropical cyclones
Italicized basins are unofficial.
- North Atlantic (2019)
- No active systems
- East and Central Pacific (2019)
- No active systems
- North Indian Ocean (2019)
- No active systems
- Mediterranean (2018–19)
- No active systems
- South-West Indian Ocean (2018–19)
- No active systems
- Australian region (2018–19)
- No active systems
- South Pacific (2018–19)
- No active systems
- South Atlantic (2018–19)
- No active systems
Last updated: 15:24, 18 June 2019 (UTC)
Did you know…
- …that 2018 was the first year ever recorded to feature Category 5 hurricanes in both the Atlantic and Pacific oceans, east of the International Date Line?
- …that the 2018 Pacific hurricane season was the first season ever recorded to feature Category 5 hurricanes on both eastern and central Pacific areas of responsibility?
- …that according to an unofficial reanalyisis using the Dvorak technique, Cyclone Hina (pictured) had a peak intensity of 170 kt (195 mph, 315 km/h)?
- …that Cyclone Onil (pictured) was the first tropical cyclone named by the India Meteorological Department?
Tropical cyclone anniversaries
June 17,
- 1971 - Hurricane Bridget passed just to the south of Acapulco, Mexico bringing gusts of 100 mph (155 km/h) to the city. Many ships, including some naval ships, were sunk killing 40 people and causing $40 million of damage.
- 2012 - Typhoon Guchol (pictured) attains Category 4 super typhoon intensity with a minimum pressure of 930 hPa with 1-minute sustained winds of 240 km/h (150 mph).
June 18,
- 1965 - Typhoon Dinah made landfall in Taiwan with winds of 220 km/h (140 mph). Dinah killed a total of 45 people and destroyed 5,000 homes.
- 1982 - The 1982 Florida subtropical storm (track pictured) affects Florida. Damages were recorded at $10 million.
- 2003 - Tropical Storm Blanca reaches maximum intensity with winds of 95 km/h (60 mph) and a minimum pressure of 997 hPa.
June 19,
- 1959 - Hurricane Three, which caused the 1959 Escuminac disaster, looped in the Gulf of Saint Lawrence, sinking 22 of 54 fishing boats from Escuminac, New Brunswick. The storm killed a total of 35 people.
- 1993 - Tropical Storm Arlene (pictured) reaches tropical storm intensity prior to making landfall on Padre Island, Texas. Arlene killed a total of 29 people and caused about $55 million of damage, with most of the deaths occurring while it was a tropical wave.
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