Tropical cyclones are formed in the ocean around the equator or between the Tropic of Cancer and Tropic of Capricorn. The water must be at a warm temperature over 26°C. The warm water evaporates and forms clouds above the ocean. If the air pressure is low where the clouds are formed, the air pulls the clouds in and they start to rotate. They rotate because of the Earth’s rotation on its axis. More clouds continue to form and the cyclone can develop into a mature cyclone. It can be categorised as a cyclone when its average wind speed exceeds 63 km/hr. When a cyclone reaches land, its strength weakens and starts to die off. This happens because
of the insufficient amount of moisture and heat In
comparison to the ocean where it formed.
Cyclone Tracy was first detected in the Arafura Sea on 20 December 1974, when it was just a cloud mass.
On the 23rd and 24th Tracy took a sharp turn towards for Darwin. In the early hours of the 25th Tracy tore through Darwin after which it decayed due to the temperature change from from the ocean to land.
Interesting fact:
The greatest number of tropical cyclones in the Australian region in any one year was 20 in 1983. Since 1950, the lowest number of tropical cyclones in any season was just 5 in 1987.
Tropical cyclones are formed in the ocean around the
of the insufficient amount of moisture and heat In
comparison to the ocean where it formed.
Cyclone Tracy was first detected in the Arafura Sea on 20 December 1974, when it was just a cloud mass.
On the 23rd and 24th Tracy took a sharp turn towards for Darwin. In the early hours of the 25th Tracy tore through Darwin after which it decayed due to the temperature change from from the ocean to land.
Interesting fact:
The greatest number of tropical cyclones in the Australian region in any one year was 20 in 1983. Since 1950, the lowest number of tropical cyclones in any season was just 5 in 1987.
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