Cape Verde hurricane

A good portion of Cape Verde storms are large, and some, such as hurricanes Allen, Ivan, Dean, and Irma have set various records. Most of the longest-lived tropical cyclones in the Atlantic basin are Cape Verde hurricanes. While many move harmlessly out to sea, some move across the Caribbean Sea and into the Gulf of Mexico, becoming damaging storms for Caribbean nations, Central America, Mexico, Bermuda, the United States, and occasionally even Canada. Research projects since the 1970s have been launched to understand the formation of these storms and their movement through the main development region.

Origin

Prior to the early 1940s, the term Cape Verde hurricane referred to August and early September storms that formed to the east of the surface plotting charts in use at the time. Cape Verde hurricanes typically develop from tropical waves which form in the African savanna during the wet season, then move into the African steppes. The disturbances move off the western coast of Africa and become tropical cyclones soon after moving off the coast, within 10 to 15 degrees latitude, or 1,100 kilometres (680 mi) to 1,600 kilometres (990 mi), of the Cape Verde Islands; this comprises the tropical latitudes east of the 40th meridian west.