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The Northwest Pacific Ocean, or Western North Pacific, is the most active basin on the planet, accounting for one third of all tropical cyclone activity. Annually, an average of 25.7 tropical cyclones in the basin acquire tropical storm strength or greater; also, an average of 16 typhoons occurred each year during the 1968–1989 period.
Tropical cyclones are very rare in the South Atlantic (although occasional examples do occur) due to consistently strong wind shear and a weak Intertropical Convergence Zone. In contrast, the African easterly jet and areas of atmospheric instability give rise to cyclones in the Atlantic Ocean and Caribbean Sea.
The Cook Islands in the South Pacific Ocean are affected by about 1.8 tropical cyclones each year, mostly during El Niño events. Cyclones are the islands' most frequent form of natural disaster. In 1997, Cyclone Martin killed 19 people in the archipelago, making it the deadliest storm there on record. In 2005, five tropical cyclones affected ...
Hurricanes happen in the North Atlantic Ocean and Northeast Pacific, typhoons occur in the South Pacific and the Indian Ocean, while cyclones take place in the northwestern Pacific Ocean ...
As of September 2021, there have been 88 tropical cyclones in the off-season, with the most recent being Tropical Storm Ana in May 2021. The first tropical cyclone of the 1938 Atlantic hurricane season, which formed on January 3, became the earliest-forming tropical storm, as post-hurricane reanalysis concluded about the storm in December 2012 ...
Most often, storms that occur in the area are weak and often decline in strength upon entry. The only land masses impacted by tropical cyclones in this region are Hawaii and Johnston Atoll . Due to the small size of the islands in relation to the Pacific Ocean, direct hits and landfalls are rare.
A typhoon is a type of tropical cyclone that occurs in the Northwest Pacific Ocean, specifically between 100°E and 180°E longitude. It is characterized by a well-defined circular structure with ...
While these conditions are necessary for tropical cyclone formation, they do not guarantee that a tropical cyclone will form. Normally, an ocean temperature of 26.5 °C (79.7 °F) spanning through a depth of at least 50 metres (160 ft) is considered the minimum to maintain the special mesocyclone that is the tropical