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Cyclone Yasi

Cyclone Yasi information report, including diagrams, map and facts
by

Eliza Ferry

on 4 September 2012

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Transcript of Cyclone Yasi

Cyclone Yasi Today I'm here to talk to you about Cyclone Yasi, a cyclone that hit Far North Queensland in early February last year. But before I tell you about Yasi, you need to know what a cyclone is. Okay, a cyclone is basically just a big, rotating windstorm. Cyclones rotate anticlockwise in the northern hemisphere and clockwise in the southern. Here's a diagram to help you understand a bit more. Now that you know what a cyclone is, I can tell you about Cyclone Yasi.

It started forming from a tropical low just off Fiji, on the 29th of January, 2011. The system intensified to a Category 3 cyclone at about 5pm on 31 January 2011 and had strengthened to Category 5 by February 2nd.

At its peak it lasted 24 hours, but it only lasted a little longer off-peak. INTERESTING FACTS
Yasi's eye was about 100km in diameter.

It travelled at a reasonably fast pace of 30-34km/h.

Yasi was named on the 1st of January 2011. Thank You For Listening Cyclone Yasi originated just off Fiji and headed toward Vanuatu. It had weakened to a category 4 cyclone by the time it made landfall. Cyclone Yasi only formed once.

The damages bill was over $5oo million as it flattened buildings, banana crops, sugar cane farms and trees.

Although no-one was killed directly, a 23-year-old man was suffocated by exhaust fumes from a generator he was using in the cyclone's aftermath. A tropical cyclone will only develop when the surface of the ocean is so warm that enough water evaporates to provide an energy source for the cyclone. The water needs to be at least 26.5 degrees, to a depth of 50 metres, for this to happen.
The air cools off very quickly as it rises off the ocean’s surface, and the moisture in it condenses and forms clouds. At the same time, strong winds start the clouds spinning and a cyclone is formed.
The Earth’s spinning helps this to happen.
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