Aqui les paso para que vean animaciones del mega sistema que sale de Africa
http://earthobservatory.nasa.gov/Library/Hurricanes/Hurricanes are commonly formed by easterly waves. The waves are “kinks” in the African Easterly Jet, a strong wind that blows over the Atlantic from the West African coast. The easterly waves trigger strong thunderstorms that move eastward. Over the warm waters of the Atlantic, the thunderstorms embedded in the easterly wave can grow into a hurricane under the right conditions.
These images and animations show an easterly wave crossing the African coast during late summer 2005. The system later developed into Hurricane Irene. Cold cloud tops appear white in these thermal-infrared images, acquired by the Meteosat-8 satellite. As the easterly wave, visible as a circular area of clouds, approached the African coast it began to rotate. On August 4, the system became a tropical depression over the Atlantic. (Images copyright 2005 EUMETSAT, provided by the British Atmospheric Data Center.)