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Cyclone Keli
Severe Tropical Cyclone Keli (NPMOC/JTWC Designation: 38P) was the first recorded post-season tropical cyclone to form in June within the South Pacific Ocean. The system formed on June 7, 1997, about 460 kilometers (285 mi) to the north of Tokelau. The depression gradually developed over the next few days while moving southwestward. It was designated as Tropical Cyclone Keli early the next day. Cyclone Keli intensified, slowly reaching its 10-minute peak wind speeds of 150 km/h, (90 mph), which made it a Category 3 severe tropical cyclone on the Australian Tropical Cyclone Intensity Scale. As it came under the influence of strong mid latitude westerlies and moved into an area of strong vertical wind shear, the cyclone started to weaken and was declared as extratropical on June 15.
Cyclone Keli struck the islands of Tuvalu on June 12 and 13, with extensive damage reported throughout the Islands with trees uprooted by wind and waves. On Nivalakita all buildings except for the church were flattened; an estimated cost to rebuild all of the houses as they were before the cyclone hit was estimated at A$ (US$), while it was estimated that the cost of rebuilding the houses with an improved, cyclone-resistant design would be about A$ (US$). The whole of Tepuka Savilivili was left uninhabitable, as coconut trees and other vegetation were swept away with no more than an area of jagged coral left behind. In Fiji, strong winds and rough seas were reported from the cyclone as it was moving to the north of Fiji, and while the cyclone was weakening it dropped 3.76 inches (95.5mm) of rain on American Samoa.
==Meteorological history==
During June 7, 1997 the Fiji Meteorological Service (FMS) reported that a tropical depression had developed to the north-east of Tokelau. Over the next couple of days the system moved towards the south-west and gradually developed further, with the United States Naval Pacific Meteorology and Oceanography Center (NPMOC) issuing a tropical cyclone formation alert for the system during June 9.〔 The NPMOC subsequently designated the system as Tropical Cyclone 38P and initiated advisories on the system early on June 10, while the system was located about to the east of Funafuti, Tuvalu. The system was subsequently named Keli by the Fiji Meteorological Service, after it had developed into a Category 1 tropical cyclone on the Australian tropical cyclone intensity scale.〔 During that day the system continued to move south-westwards, towards the island nation of Tuvalu and passed near or over the island of Niulakita during June 11. After it the system had passed over Niulakita, Keli rapidly intensified in an area of light vertical wind shear, as it moved slowly and performed a small cyclonic loop.〔
Early on June 12, the FMS reported that Keli had peaked as a Category 3 severe tropical cyclone, with 10-minute sustained windspeeds of 150 km/h (90 mph).〔〔 During that day the system started to weaken and came to within of making a second landfall on Niulakita, before it accelerated south-eastwards as it interacted with the Westerlies.〔〔 The NPMOC also reported during that day that Keli had peaked with 1-minute sustained wind speeds of 215 km/h (130 mph), which made it equivalent to a Category 4 hurricane on the Saffir-Simpson hurricane wind scale. During June 13, the system continued to move south-eastwards and passed about to the southeast of Mata-Utu in the island nation of Wallis and Futuna.〔 Later that day Keli started to transition into an extratropical cyclone, during the following day the system passed within of Apia, Samoa.〔 During June 15, the FMS reported that Keli had weakened into a tropical depression, while the NPMOC reported that it had degenerated into an extratropical cyclone.〔 The system was subsequently last noted during June 17, while it was located about to the southeast of Adamstown in the Pitcairn Islands.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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