Hurricanes in the North Atlantic and Eastern TCs with wind speeds at or overħ4 mph (64 kts, or 33 m s-1) are known as TCs with wind speeds of at leastģ9 mph but not more than 73 mph are known as Principally by heat transfer with the ocean Oceans (AMS Glossary 2nd edition) that is driven Term for a cyclone originating over the tropical The phrase tropical cyclone (TC) is a general A pre-existing low-level vorticityĬlassical factors governing TC motion (track) Least 5 degrees to invoke Coriolis turning,Īnd 7. Sea-surface and deeper ocean temperatures at orĮxceeding 26.5 C, 6. Lower troposphere but minimal vertical shear, 5. Upper tropospheric divergence that leads to deepĭivergence than convergence in the vortexĬolumn, 4. Strong moisture convergence into the vortexĬonvergence (Ekman turning), 2. Necessary but not sufficient conditions forġ. High relative humidity promotes cumulus cloud.Warm water tremendous latent heat source.Case study 2005 season (Katrina, Rita, Wilma,.Storms passing within 65 miles of my home in
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