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What is a Tropical Cyclone?. How does a Tropical Cyclone form?.
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How does a Tropical Cyclone form? Tropical Cyclones are formed by low pressure systems above warm tropical oceans. They ‘eye’ (centre) of the cyclone is surrounded by gale force winds measuring between 60km/h up to 90km/h. These winds are sustained as the tropical cyclone moves and circulate the eye in a clockwise direction(Southern Hemisphere). Surrounding the centre of the cyclone are gale force winds that can extend for hundreds of kilometres away form the eye and that measure up to 170km/h. Structure of a Cyclone