| 翻訳と辞書 |
| Tropical Storm Olaf (1997) ： ウィキペディア英語版 |
Tropical Storm Olaf (1997)
Tropical Storm Olaf was a long-lasting tropical cyclone in September–October 1997 that brought heavy rainfall to regions of Mexico, which would be devastated by Hurricane Pauline a week later. Tropical Storm Olaf formed on September 26 off the southern coast of Mexico. It moved northward and quickly intensified, reaching peak winds of 70 mph (120 km/h) before weakening and hitting Oaxaca as a tropical depression. In Mexico, El Salvador, and Guatemala, the system brought heavy rainfall, which killed 18 people and caused flooding and damage. It was originally thought that Olaf dissipated over Mexico, although its remnants continued westward for a week. It interacted with Hurricane Pauline, which caused Olaf to turn to the southeast and later to the north to strike Mexico again, finally dissipating on October 12.
==Meteorological history==
The origins of Olaf were from a tropical wave first noted over Central America on September 22. It moved slowly through the eastern Pacific Ocean, and gradually developed an area of convection. Concurrently, an upper-level low-pressure area moved from the Gulf of Mexico across Mexico into the Pacific, which produced wind shear across the region; wind shear is the difference in wind speed and direction in the atmosphere, and is usually harmful to tropical cyclogenesis. The disturbance associated with the tropical wave persisted and developed outflow. This caused the upper-level low to move away from the system. On September 26, it was sufficiently organized to be classified Tropical Depression Seventeen-E, while located about 345 miles (560 km) south of the Gulf of Tehuantepec.
A few hours after developing, the depression attained tropical storm status, or winds of at least 40 mph (65 km/h). Upon doing so, the National Hurricane Center (NHC) gave it the name "Olaf". The upper-level low, which was moving away from the region, caused the storm to move northward toward the Mexican coast. Olaf quickly intensified, as evidenced by reports from a nearby ship, and the winds reached 70 mph (115 km/h) by late on September 27; the NHC anticipated further intensification to hurricane status, or winds of at least 75 mph (120 km/h). Instead, interaction with the rough terrain of Mexico caused weakening. Olaf made landfall on Salina Cruz, Oaxaca early on September 29 as a 35 mph (55 km/h) tropical depression. Within a few hours, the circulation was not evident on satellite imagery, and the NHC discontinued advisories.〔
Despite being considered dissipated, a re-analysis of satellite imagery indicated the circulation of Olaf persisted as turned to the west toward open waters. Early on September 30, the system reached the Pacific, and it continued westward for about a week, during which it retained some convective activity. On October 5, Olaf turned toward the east, as it interacted with the large circulation of developing Hurricane Pauline. Later that day, the NHC resumed issuing advisories, while it was located about 560 miles (900 km) southwest of the southern tip of the Baja California Peninsula.〔 The system turned to the southeast, and, failing to organize, the NHC discontinued advisories on October 8. Three days later, after the remnants of Olaf turned toward the north, the NHC again resumed advisories, when it was just 70 miles (115 km) south-southwest of Tecomán, Colima.〔 〕 Late on October 12, the circulation of Olaf made its final landfall near Manzanillo, Colima, and it quickly dissipated. An associated area of thunderstorms moved over open waters again, but failed to redevelop.〔
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「Tropical Storm Olaf (1997)」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.
|
|