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Typhoon Kirogi, known in the Philippines as Typhoon Ditang, was a large typhoon that caused severe damage in Japan during early July 2000. Forming out of an area of disturbed weather on June 30, Kirogi initially tracked slowly towards the north. On July 3, the storm underwent rapid intensification and attained Category 4 status on the Saffir–Simpson Hurricane Scale the next day, according to the JTWC. On July 5, the Japan Meteorological Agency (JMA) assessed the storm to have reached its peak intensity with winds of 155 km/h (100 mph 10-minute sustained) and a barometric pressure of 940 mbar (hPa; 27.76 inHg). Over the following several days, the storm tracked towards the northeast and accelerated towards Japan. Early on July 8, Kirogi brushed eastern Japan before transitioning into an extratropical cyclone. Initial news reports stated that Kirogi produced deadly flooding in the Philippines; however, the storm was too far from the country to have any impacts. In Japan, Kirogi produced torrential rainfall and high winds, killing five people and leaving 15 billion (2001 JPY, $140 million USD) in damages. Flooding inundated nearly 1,300 homes around Tokyo and high winds cut power to roughly 20,000 residences. Three homes were destroyed in a landslide on Kozushima. ==Meteorological history== Typhoon Kirogi originated out of a disorganized area of showers and thunderstorms on June 30, 2000, associated with a weak area of low pressure, situated roughly 650 km (405 mi) east of the Philippine island of Mindanao. The system remained nearly stationary for two days as it became increasingly organized. On July 1, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert as they anticipated the low to develop into a significant tropical cyclone within 24 hours.〔 Around 0600 UTC the following day, the Japan Meteorological Agency (JMA) began monitoring the system as a tropical depression. At the same time, the JTWC also classified the system as Tropical Depression 05W and six hours later,〔 the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) began issuing advisories on the same system, classifying it as Tropical Depression Ditang.〔 Throughout the day on July 2, the depression began to take a slow northward track in response to a mid-level subtropical ridge to the east〔 and later that day, the JTWC upgraded it to a tropical storm.〔 Early the next day, the JMA also upgraded the system to a tropical storm, at which time it received the name ''Kirogi''.〔 Although a broad cyclone, convection was gradually wrapping around the southern periphery of the circulation.〔 Several hours after being named, the JMA upgraded Kirogi to a severe tropical storm and later a typhoon.〔 At the same time, the JTWC classified the storm as a typhoon.〔 Upon being upgraded the typhoon featured a well-developed outflow and prominent banding features consolidating around the system.〔 Not long after attaining typhoon intensity, Kirogi began to undergo rapid intensification.〔 Roughly 18 hours later, the JTWC reported that the storm had attained its peak intensity with winds of 215 km/h (135 mph 1-minute sustained), equivalent to a Category 4 hurricane on the Saffir–Simpson Hurricane Scale.〔 By this time, the typhoon was situated roughly 870 km (540 mi) southeast of Okinawa. The storm featured a 59 km (37 mi) wide symmetrical eye.〔 Early on July 5, the JMA reported that Kirogi attained its peak intensity with winds of 155 km/h (100 mph 10-minute sustained) and a barometric pressure of 940 mbar (hPa; 27.76 inHg).〔 The storm was a relatively large typhoon, with a gale diameter of 520 km (325 mi).〔 Several hours after attaining peak intensity on July 5, a mid-level trough caused convection around the center of Kirogi to weaken and the eye became cloud-filled. Later in the day, most of the convective bands were confined to the eastern periphery of the system.〔 Around this time, the storm took a northeasterly track, which it maintained for several days.〔 Increasing in forward motion, the storm began to weaken; however, it also grew in size. By July 6, the storm had a gale-diameter of 925 km (575 mi).〔 Gradual weakening took place as Kirogi tracked towards Japan, with both the JTWC and JMA reporting sustained winds at 140 km/h (85 mph) by July 7.〔〔 Early on July 8, the storm brushed the eastern coast of Japan near Chōshi, Chiba with winds of 130 km/h (80 mph 10-minute sustained).〔〔 Several hours later, the typhoon weakened to a severe tropical storm before transitioning into an extratropical cyclone near the southeast coast of Hokkaido. By this time, the storm took a sharp eastward turn and briefly slowed before re-accelerating. The remnants of the storm persisted until July 10, at which time it dissipated to the southwest of the Aleutian Islands.〔 To measure wind speeds at the storm's center, the Japan Meteorological Agency and Joint Typhoon Warning Center use 10-minute sustained winds and one-minute sustained winds respectively. The conversion factor between 10-minute and one-minute winds is 1.14x. The JMA's peak intensity for Kirogi was 155 km/h (100 mph) 10-minute sustained, or 185 km/h (115 mph) one-minute sustained.〔〔 The JTWC's peak intensity for Kirogi was 215 km/h (135 mph) one-minute sustained, or 185 km/h (115 mph) 10-minute sustained.〔〔 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 Kirogi (2000)」の詳細全文を読む スポンサード リンク
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