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Typhoon Soudelor, known in the Philippines as Typhoon Egay,〔 was a powerful typhoon that underwent rapid deepening east of Taiwan in the 2003 Pacific typhoon season. It was the sixth named storm by the Japan Meteorological Agency (JMA) of the season, as well as the third typhoon. It formed on June 12 from a disturbance in the monsoon trough, located east of the Philippines. The system moved generally to the northwest after its genesis, gradually intensifying into a tropical storm. While offshore the Philippines, Soudelor dropped heavy rainfall that caused flooding and left thousands homeless. The storm caused $2.46 million in damage, and 12 deaths. After affecting the Philippines, Soudelor moved into an area of low wind shear and with favorable outflow. It became a typhoon on June 17, and quickly developed an eye while rapidly intensifying. The storm struck the Japanese island of Iriomote-jima, where wind gusts reached 204 km/h (127 mph). It also affected Taiwan, where floods covered highways and caused mudslides. Early on June 18, Soudelor reached peak 10–minute sustained winds of 150 km/h (90 mph). Subsequently, an increase in shear and the passage of a trough weakened the typhoon and caused it to turn to the northeast. Soudelor weakened to a tropical storm on June 19, and subsequently it passed between Japan and South Korea. It became an extratropical cyclone that day, dissipating on June 24. In Japan, the storm caused widespread power outages, although damage was minimal, and there were 21 injuries. In South Korea, there was $12.1 million in damage and two deaths. ==Meteorological history== The origins of Soudelor were from a tropical disturbance that persisted a short distance northwest of Pohnpei on June 7. By two days later, it had a large area of convection, and it moved generally westward. Late on June 9, the Joint Typhoon Warning Center (JTWC) issued a tropical cyclone formation alert (TCFA), although the system initially failed to develop due to wind shear in the region. The thunderstorms decreased over the increasingly exposed circulation. On June 11, the shear decreased,〔 and convection became better organized.〔 The JTWC initiated warnings on Tropical Depression 07W late that day,〔 and at 0000 UTC on June 12, the Japan Meteorological Agency (JMA) also remarked that a tropical depression had formed to the northeast of Palau.〔 After forming, the depression tracked generally westward due to a subtropical ridge to the north.〔 Around that time, it was still located within the monsoon trough, and it interacted with another circulation to its east-southeast, causing a motion to the west-northwest. As it moved away from the other circulation, the depression was able to intensify,〔 and the wind shear decreased.〔 On June 13 the JMA upgraded the depression to Tropical Storm Soudelor to the east of Samar Island in the Philippines.〔 That day, the Philippine Atmospheric, Geophysical and Astronomical Services Administration PAGASA initiated advisories and gave it the local name "Egay". Upon becoming a tropical storm, Soudelor developed rainbands to the north and south, although it could not intensify significantly due to a tropical upper tropospheric trough to the east.〔 A mid-latitude trough to the north weakened the ridge, which allowed Soudelor to turn more to the northwest off the northeast coast of the Philippines. The circulation became exposed from the deepest convection,〔 and around that time the storm was located about 160 km (100 mi) east of Samar Island. Thunderstorms gradually increased, and the outflow improved.〔 Late on June 16, the JTWC upgraded Soudelor to a typhoon,〔 and the next day the JMA followed suit when the storm was located southeast of Taiwan.〔 Around the time that Soudelor became a typhoon, it began moving toward the north, influenced by an approaching trough, and it passed about 95 km (60 mi) northeast of Luzon. A ragged eye developed early on June 17, which quickly became better organized.〔 With its outflow enhanced by the approaching trough, Soudelor rapidly intensified to the east of Taiwan.〔 The typhoon struck the Japanese island of Iriomote-jima at around 2030 UTC on June 17.〔 At 0600 UTC on June 18, the JTWC estimated peak 1 minute winds of 215 km/h (135 mph).〔 At the same time, JMA estimated peak 10 minute winds of 150 km/h (90 mph) when it was located west of Okinawa.〔 While at its maximum strength, Soudelor had a circular eye 33 km (21 mi) in diameter.〔 It turned to the north-northeast, maintaining its peak winds for about 12 hours before increased shear from the westerlies caused weakening.〔 The eye quickly dissipated, and the system began transitioning into an extratropical cyclone.〔 Early on June 19, the JMA downgraded Soudelor below typhoon status, and the storm later crossed between Japan and South Korea into the Sea of Japan. At 1500 UTC that day, the JMA declared the storm as extratropical while it was near the Oki Islands;〔 the JTWC followed suit three hours later.〔 The extratropical remnants of Soudelor continued to the northeast, crossing northern Japan on June 20. The storm slowed and turned to the east, dissipating on June 24.〔 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 Soudelor (2003)」の詳細全文を読む スポンサード リンク
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