 On average the basin sees nine tropical cyclones annually with about half of them becoming severe tropical cyclones.Cyclones rarely form in other tropical ocean areas, which are not formally considered tropical cyclone basins.Tropical depressions and tropical storms occur occasionally in the South Atlantic, and the only full-blown tropical cyclones on record were 2004's Hurricane Catarina, which made landfall in Brazil, 2010's Tropical Storm Anita, which formed off the coast of Rio Grande do Sul and Tropical Storm Iba in 2019.