Tropical cyclones


How tropical cyclones develop:

Tropical cyclones develop when the sea temperature is 26.5°C or higher and when the wind shear (the difference in windspeed) between higher and lower parts of the atmosphere is low.

The source area or most tropical cyclones is between 5° and 30° north and south of the equator-any further from the equator and the water isn’t warm enough.

  • The majority of cyclones occur when sea temperatures are highest – in the northern hemisphere this is Jun to November. In the southern hemisphere, November to April.

Warm, moist air rises and condensation occurs. This releases


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