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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Meteorological history of Hurricane Mitch ： ウィキペディア英語版 Meteorological history of Hurricane Mitch Hurricane Mitch's meteorological history began with its origins over Africa as a tropical wave and lasted until its dissipation as an extratropical cyclone north of the United Kingdom. Tropical Depression Thirteen formed on October 22, 1998, over the southwestern Caribbean Sea from a tropical wave that exited Africa on October 10. It executed a small loop, and while doing so intensified into Tropical Storm Mitch. A weakness in a ridge allowed the storm to track slowly to the north. After becoming disorganized due to wind shear from a nearby upper-level low, Mitch quickly intensified in response to improving conditions which included warm waters and good outflow. It became a hurricane on October 24 and developed an eye. After turning to the west, Mitch rapidly intensified, first into a major hurricane on October 25 and then into a Category 5 on the Saffir-Simpson Hurricane Scale the next day. At peak intensity, Mitch maintained maximum sustained winds of 180 mph (285 km/h) while off the northern coast of Honduras. Hurricane Hunters reported a minimum barometric pressure of , which at the time was the lowest in the month of October and tied for the fourth lowest for any Atlantic hurricane. Initially, the National Hurricane Center (NHC) and various tropical cyclone forecast models anticipated a turn to the north, threatening the Yucatán Peninsula. Instead, Mitch turned to the south due to a ridge that was not observed while the storm was active. Land interaction imparted weakening, and the hurricane made landfall on Honduras on October 29 with winds of 80 mph (130 km/h). Turning westward, Mitch slowly weakened over land and maintained deep convection over adjacent waters. After moving across mountainous terrain in Central America, the surface circulation of Mitch dissipated on November 1. The next day, the remnants reached the Gulf of Mexico and reorganized into a tropical storm on November 3. Mitch accelerated to the northeast ahead of a cold front, moving across the Yucatán Peninsula before striking southwestern Florida on November 5. Shortly thereafter, the storm became an extratropical cyclone, which was tracked by the NHC until November 9. ==Origins== The origin of Hurricane Mitch can be traced to a tropical wave – an elongated area of low air pressure moving from east to west – that moved through western Africa on October 8, as evidenced by radiosonde data. On October 10, the wave exited the coast, and it continued generally westward without development due to strong wind shear. The wave reached the eastern Caribbean Sea on October 18, and over the subsequent few days developed an organizing area of convection, or thunderstorms. The system organized enough to prompt a Hurricane Hunters investigation, which observed a small circulation center and flight-level tropical storm force winds. As a result, the National Hurricane Center (NHC) estimated the system had developed into a tropical cyclone by 0000 UTC on October 22, located 415 mi (665 km) south of Kingston, Jamaica.〔 Upon being classified, Tropical Depression Thirteen was already near tropical storm status, with established outflow. At the time, the circulation was on the northern periphery of the convection.〔 Initially, an upper-level low to the north was shearing the convection, but steady intensification was expected due to generally favorable conditions, with an anticyclone expected to develop aloft.〔 The depression remained nearly stationary in the southwestern Caribbean Sea, eventually executing a small loop about east of San Andrés island.〔 The convective structure initially was described as "amorphous", with two rainbands extending from the center.〔 Late on October 22, the Hurricane Hunters observed flight-level winds of , which indicated surface winds of at least tropical storm-force. Based on the reading, the NHC upgraded the depression to Tropical Storm Mitch. 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「Meteorological history of Hurricane Mitch」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.