Movement of cyclones
Movement of Cyclones steered by the global winds
The global wind pattern is also known as the "general circulation" and the surface winds of each hemisphere are divided into three wind belts:
Polar Easterlies: From 60-90 degrees latitude.
Prevailing Westerlies: From 30-60 degrees latitude (aka Westerlies).
Tropical Easterlies: From 0-30 degrees latitude (aka Trade Winds).
The easterly trade winds of both hemispheres converge at an area near the equator called the "Intertropical Convergence Zone (ITCZ)", producing a narrow band of clouds and thunderstorms that encircle portions of the globe.
The path of a cyclone greatly depends upon the wind belt in which it is located. A cyclone originating in the eastern tropical Pacific, for example, is driven westward by easterly trade winds in the tropics.
Eventually, these storms turn northwestward around the subtropical high and migrate into higher latitudes.
Cyclones draw their energy from the warm surface water of the tropics and latent heat of condensation, which explains why cyclones dissipate rapidly once they move over cold water.