Tropical wave

Tropical Wave ( also easterly waves, German eastern waves, called ) are regions of high thunderstorm activity and cloud cover, which have their origin in the intertropical convergence zone. Tropical waves are usually brought by easterly winds that prevail at the latitudes near the equator, to the west. They are elongated, oriented from north to south areas with relatively low air pressure.

Atlantic

In the Atlantic Ocean where tropical waves form mostly in North Africa and migrate, due to the trade winds to the west. Approximately 60% of the Atlantic tropical cyclones originate from tropical waves, while 85% of the strong Atlantic hurricanes have (Category 3 on the Saffir -Simpson Hurricane Scale ) originated in them.

Strong wind shear is often the cause of a regression of tropical cyclones to tropical waves. Tear the shear in the higher elevations from, so the shaft can strengthen back into a tropical storm.

When a tropical wave moves too fast, so they can not develop. Nevertheless, it can reach wind speeds of gale force. The wave slows down eventually, a circulation and the wave is incremented to a tropical cyclone forms.

Eastern Pacific

Most tropical storms in the eastern Pacific form from tropical waves that occur in North Africa and migrate across Central America into the Pacific.

• Tropical Cyclone