According to the literature, the tropical/subtropical oceans adjacent to South America are not climatologically conducive to tropical cyclones forming according to the literature. However, since 2004, two tropical cyclones have been recorded in the southwest Atlantic Ocean and one subtropical that had the potential to become tropical. Adequate locations for the genesis of tropical cyclones can be identified through the index of the potential of genesis, which is a methodology developed by Dr. Kerry Emanuel and collaborators. Therefore, the objective of the study is to contribute to the climatological knowledge of regions favorable to the genesis of tropical cyclones in the vicinity of South America using the genesis potential index. Moreover, we analyze some oceanic and atmospheric variables important to cyclogenesis. To this end, the ERA5 reanalysis data from the 1989-2019 period are used, which is considered state-of-the-art in terms of reanalysis. The results show the climatology of the genesis potential index, the components of this index, and other atmospheric and oceanic variables that are important for the development of tropical systems. The main result obtained in the study is the presence of potential for tropical cyclogenesis in the Atlantic Ocean along the Brazilian coast. In October, a weak signal appears between the coast of Bahia and Esprito Santo. This signal intensifies, obtaining maximum intensity between February and March when it also reaches the south coast of Brazil. Therefore, the use of a robust methodology applied in state-of-the-art data demystifies the hypothesis that there is no potential for the genesis of tropical cyclones off the coast of Brazil.
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