Hurricane Helene (2006)
Hurricane Helene was the ninth tropical storm, fourth hurricane, and strongest hurricane of the 2006 Atlantic hurricane season.
Helene was a long-lived Cape Verde-type hurricane that formed in the extreme southeastern part of the North Atlantic Ocean, peaking as a Category 3 hurricane on the Saffir-Simpson hurricane scale as it traversed the central Atlantic. It never affected land until the very end of its lifespan as a weak extratropical system, which had minor impact in the northern British Isles.
Meteorological history
In the second week of September, a strong tropical wave began to emerge off the coast of Africa. It was well-organized from the start, and on September 11, even before it emerged off the coast, the National Hurricane Center believed that it could quickly develop into a tropical depression. That is indeed what happened, and it became Tropical Depression Eight on the morning of September 12. The enormous size of the depression made it fairly slow to develop, combined with some easterly wind shear in the eastern Atlantic and influence of the Saharan Air Layer to the north as it tracked south of the Cape Verde islands. Convection was also slow to build in, with little banding at first. The initial strengthening was delayed as a result. However, on September 13, the organization improved as banding became better defined, and that evening, the depression strengthened into Tropical Storm Helene.