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Hurricane Inga is the third longest-lived Atlantic hurricane on record. The 11th tropical cyclone and 9th named storm of the 1969 Atlantic hurricane season, Inga developed on September 20 in the central Atlantic and tracked westward. After attaining tropical storm status, the system deteriorated into a depression, but once again intensified several days later. The storm eventually peaked in strength on October 5, with winds corresponding to Category 3 on the modern-day Saffir–Simpson Hurricane Scale. Throughout its path, Inga underwent several changes in direction and oscillations in strength, before dissipating on October 15, 25 days after it formed. Despite its duration, Inga caused little damage, and mostly remained over open waters. ==Meteorological history== On September 20, a tropical disturbance in the Atlantic Ocean developed into a tropical depression. On the next morning, the National Hurricane Center reported that the system became a tropical storm while centered about east-southeast of San Juan, Puerto Rico. At the time, the storm was moving towards the west at . At the time, Inga was a very small tropical cyclone; gale-force winds extended less than from the center. However, by September 23, the storm had become disorganized and sprawling. Later that day, Inga weakened back into a tropical depression.〔 The depression continued west-northwestward, passing north of the Leeward Islands, before drifting northwestward. It once again attained tropical storm status on September 28,〔 while situated well to the east of the Bahamas. Inga continued to intensify, and achieved hurricane status at 0000 UTC on September 30, at which point it turned northeastward.〔 The storm then abruptly, yet gradually, turned towards the south, and ultimately completed a counter-clockwise loop as it bent back westward.〔 Steering currents were weak, and the hurricane continued to proceed slowly. Late on October 3, it turned to the northwest, still as a Category 1 hurricane on the modern-day Saffir–Simpson Hurricane Scale. The storm then curved northeastward and intensified to Category 2 status at 0000 UTC on October 5.〔 Inga accelerated somewhat as it passed to the southeast of Bermuda. By the morning hours of October 5, it was determined that the hurricane posed no significant threat to the island. At 1200 UTC, the storm's lowest known barometric pressure of 964 millibars was recorded. Shortly thereafter, it briefly strengthened to Category 3 status; the cyclone peaked with maximum sustained winds of 115 mph (185 km/h). As it moved towards the open waters of the Atlantic and entered a cooler environment, it deteriorated to Category 1 intensity on October 6.〔 The hurricane slowed again, and as cold air became entrained into its circulation, it began to lose tropical characteristics. However, Inga once again intensified and reattained Category 2 intensity on October 7. At this point, the hurricane was drifting generally eastward. However, in time the storm turned towards the south and began to weaken.〔 Operationally, the storm was believed to have downgraded to a tropical storm on October 8 and regained hurricane status thereafter, but instead it likely maintained Category 1 intensity steadily until October 10. After the storm finally degenerated into a tropical storm, it curved southwestward.〔 The storm's center became ill-defined and elongated at the storm continued to lose strength. Heading westward, Inga was downgraded to a tropical depression before dissipating fully on October 15,〔 about from where it initially attained hurricane status. 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 Inga (1969)」の詳細全文を読む スポンサード リンク
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