Start studying Tropical cyclones. Cyclone Yasi is a big one, with predicted wind speeds of over 295km/h, a core region 500km in diameter, and a zone of associated storm activity spread over 2000km. Since Cyclones occur in all types of different areas, cyclones mostly happen in ocean. Cyclones form in the South Pacific and Indian Ocean, which is the ocean that borders Northeast Australia. How do cyclones form: Genesis of a Cyclone. Cyclones are one of nature’s responses when there is a meeting between hot and cold air currents. What is a Tropical Cyclone. What do fronts encourage? Where And When Do Tropical Cyclones Happen? The Tropical Cyclones. Cyclones, which are storms that rotate around a central low-pressure area, occur when high-pressure cold air fronts slide on top of low-pressure warm air fronts. In Australia, cyclones usually occur off the northwest coast of Western Australia, in the Gulf of Carpentaria and the Coral Sea, just off the coastline of Queensland. Cyclones are characterized by inward spiraling winds that rotate about a zone of low pressure. While in Asia they are called typhoons. Tropical cyclones generally form in any ocean where water temperatures are greater than 80 degrees Fahrenheit and the upper-level winds are benign. When the warm air rises, cold air on all sides drops, and spinning occurs due to the Coriolis effect. These are circular shaped rotating storms which have huge diameters ranging from 150 to 1000 kilometres.Due to this high speed rotation, an intense low pressure is formed at the centre; this is called the “Eye of the storm”.Cyclones of high intensity are caused mostly in tropical areas. Hurricane Season normally begins at the time at which an area of the ocean temperature is at its warmest. Hurricanes, for example, are the names given to tropical cyclones in the United States and the Antilles. Tropical cyclones which occur in the Atlantic region and affect the Caribbean and USA usually comprise less than 15% of global tropical cyclone activity. In meteorology, a cyclone (/ˈsaɪ.kloʊn/) is a large scale air mass that rotates around a strong center of low atmospheric pressure. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The different names have to do with where the storms form. Because Tropical Cyclones form over tropical or subtropical waters and feed on the heat that is released when moist air rises. The Coriolis effect is less prominent along the equator, so tropical cyclones usually do not develop within five degrees north or south of the equator. Most occur between December and April. When a hurricane makes landfall (comes ashore), the storm surge causes extensive flooding. Explain why hurricanes mainly occur in the tropics. Cyclones happen most in Australia. Where Do Tropical Cyclones Form? 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