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Tropical cyclogenesis is extremely rare in the far southeastern Pacific Ocean, due to the cold sea-surface temperatures generated by the Humboldt Current, and also due to unfavorable wind shear; as such, Cyclone Yaku in March 2023 is the only known instance of a tropical cyclone impacting western South America.
Cyclogenesis is an umbrella term for at least three different processes, all of which result in the development of some sort of cyclone, and at any size from the microscale to the synoptic scale. Tropical cyclones form due to latent heat driven by significant thunderstorm activity, developing a warm core.
[3] [1] [6] This occurs about once every other year on average, [1] and tropical cyclone development occurs in tandem with around half of all CAGs. [8] Tropical cyclogenesis typically occurs on the northeastern periphery of the gyre, with the resulting tropical cyclone tracking counterclockwise along with the flow about the gyre. [8] [11]
The warm waters of the main development region are depicted in orange. The main development region is the area of warm water in the Atlantic Ocean stretching from the west coast of northern Africa to the east coast of Central America and the Gulf Coast of the United States.
A tropical cyclone is the generic term for a warm-cored, non-frontal synoptic-scale low-pressure system over tropical or subtropical waters around the world. [4] [5] The systems generally have a well-defined center which is surrounded by deep atmospheric convection and a closed wind circulation at the surface. [4]
DIV areas are regions of divergence aloft, which will lead to surface convergence and aid cyclogenesis. Extratropical cyclones form anywhere within the extratropical regions of the Earth (usually between 30° and 60° latitude from the equator), either through cyclogenesis or extratropical transition.
Tropical cyclogenesis is the development and strengthening of a tropical cyclone. [28] The mechanisms by which tropical cyclogenesis occurs are distinctly different from those that produce mid-latitude cyclones. Tropical cyclogenesis, the development of a warm-core cyclone, begins with significant convection in a favorable atmospheric ...
The Non-tropical storms task force coordinates most of Wikipedia's coverage on extratropical cyclones, which tropical cyclones often transition into near the end of their lifespan. The Floods task force takes on the scope of flooding events all over the world, with rainfall from tropical cyclones a significant factor in many of them.