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Super Typhoon Flo was a powerful Category 5 typhoon that killed over 30 people and caused over $4 billion (1990 USD) in damages when it struck Honshū, Japan in mid-September 1990. The twelfth typhoon and first super typhoon of the 1990 Pacific typhoon season, it formed on September 8, as Tropical Depression 20W. It reached typhoon status on September 15, 1990. It rapidly intensified on the 16th and 17th to a 165 mph super typhoon near Okinawa. Vertical shear weakened it as it recurved to the northeast, and Flo hit Honshū on the 19th as a 155 km/h (100 mph) typhoon. It continued rapidly northeastward, became extratropical on the 20th, and dissipated on the 22nd.〔("Flo report" ) Joint Typhoon Warning Center. Retrieved 01-15-12.〕 Widespread flooding and landslides killed thirty-two people and caused billions of dollars in property damage. Typhoon Flo was the costliest typhoon in the West Pacific at the time. Now it ranks as the 6th costliest Western Pacific typhoon of all time, only to be surpassed by Typhoons Mireille, Songda, Fitow, Prapiroon and Herb.〔("Costliest natural disasters list" ) The International Disasters Database. Retrieved on 1-14-12.〕 ==Meteorological history== Tropical Depression 20W developed over the waters about 430 kilometers (270 miles) east-southeast of Guam on September 8 and tracked steadily northwestwards over the next four days. The system reached Tropical Storm strength and was assigned the name Flo. During that time, it rapidly intensified and attained typhoon intensity about 780 kilometers (480 miles) southeast of Okinawa on the evening of September 15. Flo reached peak intensity on September 17 with one-minute maximum sustained winds of 270 km/h (165 mph) and a minimum central pressure of 891 mbar (hPa; 26.31 inHg), making it the strongest storm of the 1990 season, and one of the strongest tropical cyclones ever recorded. Approaching the Ryukyu Islands, it recurved on September 17 towards Japan.〔 Accelerating on September 19, 155 km/h (100 mph) Category 2 Typhoon Flo made landfall the south coast of Honshu that evening and weakened rapidly over land to a tropical storm about 240 kilometers (150 miles) northeast of Osaka. Flo became an extratropical cyclone on September 20 as it moved over the waters east of northern Honshu. The remnants of former Typhoon Flo continued to move northeast, and the extratropical low dissipated completely on September 22.〔 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 Flo (1990)」の詳細全文を読む スポンサード リンク
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