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Typhoon Brian was the first in a series of tropical cyclones to impact southern China and northern Vietnam in October 1989. Originating from an area of low pressure associated with a monsoon trough in late-September, Brian quickly organized into a tropical storm over the South China Sea on September 30. Tracking along a general west-southwest to westerly course, the storm attained typhoon status on October 1 before making landfall along the southern coast of Hainan Island the following day. Slight weakening occurred during Brian's brief passage of Hainan Island before the system entered the Gulf of Tonkin. The storm ultimately struck Vietnam on October 3 before dissipating the next day over Laos. Across Hainan Island, Brian caused extensive damage to property and infrastructure. Nearly 185,000 homes were damaged or destroyed by the storm's high winds or flash flooding. Communications were severely disrupted as of power and telephone lines were downed. Brian killed 40 people and inflicted 837 million Renminbi (US$222 million) in damage throughout Hainan before impacting Vietnam and causing further damage. Significant losses were reported in Vietnam as well; however, the rapid succession of Brian and two other typhoons made it difficult to differentiate the losses caused by each storm. ==Meteorological history== In late September 1989, an active monsoon trough over the South China Sea spawned a tropical disturbance near northern Luzon. By September 28, a broad band of convection associated with a weak area of low pressure developed within the trough. Later that day, the Japan Meteorological Agency (JMA) began monitoring the system as a tropical depression. Aided by a well-defined anticyclone, the low quickly organized, prompting the Joint Typhoon Warning Center (JTWC) to issue a Tropical Cyclone Formation Alert. Initially steered westward by a subtropical ridge, the depression became quasi-stationary on September 30 about 360 km (225 mi) southeast of Hong Kong as the ridge weakened. Shortly after the system stalled, the JTWC also began warning on it as a tropical depression.〔 Following a reintensification of the ridge later on September 30, the depression resumed a west-southwesterly track. During this time, the depression attained tropical storm status and was given the name Brian by the JTWC. Over the following 24 hours, Brian continued to intensify and ultimately reached typhoon strength late on October 1.〔 After developing a large eye,〔 Brian reached its peak intensity on October 2 with winds of 150 km/h (90 mph; one-minute sustained).〔 The JMA also classified Brian as a typhoon around this time, estimating the storm to have attained peak ten-minute sustained winds of 120 km/h (75 mph) as well as a minimum pressure of 970 mbar (hPa; 28.64 inHg).〔 Now tracking due west, the typhoon moved towards Hainan Island and ultimately made landfall along the southeastern coast of the island around 1500 UTC.〔 Only slight weakening took place as the typhoon skirted along the southern coast of Hainan Island. By October 3, Brian had entered the Gulf of Tonkin and struck Vietnam later that day near Vinh with winds of 140 km/h (85 km/h). Rapid dissipation ensued once onshore and Brian eventually dissipated on October 4 over the mountainous terrain of Laos.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Typhoon Brian (1989)」の詳細全文を読む スポンサード リンク
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