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Hurricane Georges was a powerful and long-lived Cape Verde-type Category 4 hurricane which caused severe destruction as it traversed the Caribbean and Gulf of Mexico in September 1998, making seven landfalls along its path. Georges was the seventh tropical storm, fourth hurricane, and second major hurricane of the 1998 Atlantic hurricane season. It became the second most destructive storm of the season after Hurricane Mitch and the costliest Atlantic hurricane since Hurricane Andrew in 1992. Georges killed 604 people, mainly on the island of Hispaniola, and caused extensive damage resulting at just under $10 billion (1998 US dollars, $ USD) in damages mostly in St. Kitts and Nevis, Puerto Rico and Hispaniola. The hurricane made landfall in at least seven different countries (Antigua and Barbuda, St. Kitts and Nevis, Haiti, the Dominican Republic, Cuba and the United States) and Puerto Rico, a Commonwealth of the United States — more than any other hurricane since Hurricane Inez of the 1966 season. ==Meteorological history== (詳細はtropical wave exited the coast of Africa on September 13. Moving westward, the large system quickly developed a closed circulation, and was classified Tropical Depression Seven on September 15. A strong upper-level ridge forced the depression to the west-northwest, where warm water temperatures allowed it to strengthen to a tropical storm on September 16. Georges's circulation developed strong banding features around a well-organized Central Dense Overcast, and with the aid of a developing anti-cyclone, Georges attained hurricane status late on September 17.〔 Conditions became nearly ideal for continued development, including warm water temperatures, low-level inflow to the hurricane's north, and good upper-level outflow. A banding eye developed, and Georges reached major hurricane strength on September 19 while 675 mi (1085 km) east-southeast of Guadeloupe. By September 19, an upper-level anticyclone was well established over Georges and satellite pictures suggested that the hurricane was beginning to strengthen rapidly, as indicated by the cooling cloud tops, increased symmetry of the deep convection, and the warming and contracting of the well-defined 40 mi (63 km) wide eye as rapid intensification continued, and Georges peaked at a very dangerous Category 4 storm with 155 mph (250 km/h) wind and a 937 minimal pressure late on September 19 and early September 20. At that time, Georges was the most intense, strongest storm since Hurricane Hugo and alongside Hurricane Luis, it is one of the largest major hurricanes in the Atlantic with hurricane force windfields extending more than 150 mi (250 km) from the center and with a more than 300 mi (490 km) wide tropical storm force windfield. Shortly after peaking, upper-level wind shear from the development of an upper-level low weakened the hurricane on September 20 in the afternoon, as the central pressure had risen 26 mb as Georges approached the Leeward Islands.〔 On September 21, after weakening considerably, Category 3 Georges made landfall directly on Antigua and three hours later in St. Kitts, though its 175 mi (280 km) wide tropical storm force windfield affected all the Leeward Islands. After weakening to a Category 2 hurricane over the Caribbean, upper-level shear decreased, and Georges strengthened a bit before making landfall near Fajardo, Puerto Rico as a 115 mph (175 km/h) Category 3 hurricane early in the morning. Over the mountainous terrain of the island, the hurricane weakened again, but over the Mona Passage it again re-intensified to hit eastern Dominican Republic with winds of 120 mph (195 km/h) on September 22. Like in Puerto Rico, Georges was greatly weakened by the mountainous terrain, and after crossing the Windward Passage, it struck 30 mi (48 km) east of Guantánamo Bay, Cuba on September 23. Well-defined upper-level outflow allowed the hurricane to remain well organized, and while paralleling the northern coastline of the island Georges retained minimal hurricane status.〔 Hurricane Georges reached the Straits of Florida on September 24, and as it had done earlier in its lifetime, quickly restrengthened to Category 2 status on the September 25 due to warm water temperatures and little upper-level shear. It continued to the west-northwest, and struck Key West later on September 25 with winds of 105 mph (165 km/h). Despite moving over warmer water, Georges only managed to peak at 110 mph (175 km/h) in the Gulf of Mexico, likely due to its disrupted inner core. A mid-tropospheric anticyclone pushed the hurricane slowly north-northwestward, forcing Georges to make its seventh and final landfall near Biloxi, Mississippi on September 28. Within 24 hours, Georges had weakened to a tropical depression, and due to weak steering currents the storm looped over southern Mississippi, then drifted to the east. The weak circulation moved eastward over the interior of the Florida Panhandle, and dissipated on October 1 near the Florida/Georgia border.〔 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「Hurricane Georges」の詳細全文を読む スポンサード リンク
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