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Cyclone Thelma : ウィキペディア英語版 | Cyclone Thelma
Severe Tropical Cyclone Thelma was a tropical cyclone that affected northern Australia from 6 December 1998 until 12 December 1998. Cyclone Thelma was one of the most intense tropical cyclones to be observed off the coast of Australia. Thelma formed in the Arafura Sea north of the Northern Territory while intensifying rapidly into a Category 5 cyclone, passing very near the Tiwi Islands and posing a severe threat to Darwin, but fortunately passed by at a distance of . It then moved across the Timor Sea before hitting the north Kimberley coast. Thelma was the first known Category 5 cyclone to be observed in the Timor Sea, and was also the most intense cyclone to threaten Darwin since Cyclone Tracy on Christmas Eve in 1974. Ten months after the storm's passage, the skull of an 81-year-old man, who was believed to have been swept away by flood waters, was discovered. ==Meteorological history==
A developing low in the Timor Sea in early December was named Thelma at 2 p.m. Australian Central Standard Time (0430 UTC) on 6 December, located about north of Darwin. The new cyclone drifted slowly south while rapidly intensifying. Thelma's intensity increased from a Category 2 to a Category 4 during 7 December. Thelma turned towards the southwest and reached Category 5 intensity on the Australian scale just north of Bathurst Island at about 9 a.m. CST on 8 December (2330 UTC 7 December). The cyclone attained a minimum central pressure of 920 hPa, and maximum wind gusts of 320 km/h (200 mph) at 8 p.m. CST (1030 UTC) on the 8 December, only two days after being named. Cyclone Thelma's rate of intensification was close to twice the average rate of most cyclones. Thelma continued moving steadily southwest at about 10 km/h (6 mph) before turning southwards, passing about from Troughton Island. The cyclone weakened to a Category 3 while crossing the Kimberley coast northwest of Kuri Bay early on 11 December. The cyclone weakened rapidly while over land. Thelma was downgraded below cyclone strength late on 11 December while moving in a more southerly track. The ex-cyclone moved through the west Kimberley and Pilbara on 12 December and 13 December. On the morning of 14 December, the low crossed the Pilbara coast north of Wallal, east northeast of Port Hedland. It then moved southward through Pilbara and dissipated.〔〔
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