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| tropical cyclone meteorology | |
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ATLANTIC Tropical waves develop when warm air drifts off of the continent of Africa onto the Atlantic Ocean . Over oceans, Atmospheric Pressure is higher outside of the Tropics . Due to its clockwise circulation, the large transoceanic High-pressure Cell or Anticyclone centered near the Azores islands impels easterly waves away from the coastal areas of Africa towards North America . In the Atlantic Ocean , tropical waves typically originate in North Africa and move westward. Approximately 60% of Atlantic Tropical Cyclones originate from tropical waves, while approximately 85% of intense Atlantic hurricanes ( Category 3 and greater) develop from tropical waves. Tropical cyclones can sometimes degenerate back into a tropical wave. This normally occurs if upper level shear is too strong. Tropical storms can redevelop if the upper level shear abates. If a tropical wave is moving too fast, it might not develop, but they can still have strong winds of over tropical storm force. An example of this is Hurricane Claudette in 2003 , where the wave had winds of 50 mph before slowing enough to develop a circulation. EAST PACIFIC Most eastern Pacific Ocean tropical cyclones are formed out of tropical waves that originate in North Africa and move across the Atlantic . SEE ALSO REFERENCES |
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