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Cyclone Tracy was a tropical cyclone that destroyed the city of Darwin, Northern Territory, Australia, from Christmas Eve to Christmas Day, 1974. It is the most compact tropical cyclone on record in Australia, with the gale force winds reaching out only 48 km (30 mi) from the centre. It is the second most compact cyclone in the world. Tropical Storm Marco of the 2008 Atlantic hurricane season had gale-force winds reaching only 19 km (12 mi) from the centre. After forming over the Arafura Sea, the Tracy moved south and hit the city with Category 4 winds on the Australian cyclone scale. It is possible that it had reached Category 3 on the Saffir-Simpson Hurricane Scale when it made landfall.
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