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Typhoon Neoguri, known in the Philippines as Typhoon Florita, was a large and powerful tropical cyclone which mainly struck Japan in 2014. The eighth named storm and the second typhoon of the annual typhoon season, Neoguri developed into a tropical storm on July 3 and then a typhoon on July 4. It rapidly deepened on July 5, reaching peak intensity late on July 6. Neoguri began to decay on July 7 and passed through Okinawa on July 8 and then making landfall over Kyushu as a severe tropical storm late on July 9. After Neoguri passed through the southern coast of Honshū on July 10, it became extratropical on July 11. ==Meteorological history== Late on June 30, a tropical disturbance formed about east of Chuuk as a broad area of trough with flaring convection, and the Japan Meteorological Agency (JMA) reported that a low-pressure area formed at the same area late on the next day.〔(【引用サイトリンク】url=http://www.nrlmry.navy.mil/tcdat/tc14/WPAC/08W.NEOGURI/trackfile.txt )〕 Late on July 2, JMA upgraded the system to a tropical depression, as well as the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert at the same time, because of formative convective banding features under favourable environmental conditions with low vertical wind shear and good outflow. Early on July 3, JMA began to issue tropical cyclone advisories for the system. Moreover, JTWC upgraded it to a tropical depression with flaring and chaotic deep convection. Late on the same day, JTWC upgraded the system to a tropical storm and designated it as ''08W'' for an increase in organisation of the low-level circulation centre. The JMA upgraded the system to a tropical storm and named it ''Neoguri'' early on July 4, when a microwave imagery revealed that an eyewall was developing. At 09:00 UTC, the JMA upgraded Neoguri to a severe tropical storm, and then to a typhoon only three hours later, when the system continued tracking northwestwards along the southern periphery of a deep subtropical ridge. Late on the same day, JTWC upgraded Neoguri to a typhoon, when the system had further consolidated with an almost continuous eyewall. On July 5, Neoguri rapidly deepened and consolidated as curved banding wrapped tighter into a ragged eye, owing to the robust all-around outflow. At noon, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) gave it the local name ''Florita'' for entering the Philippine Area of Responsibility. On July 6, the eye of Neoguri became highly symmetric and attained a large size with a diameter of , when the system was still tracking west-northwestwards along the southern periphery of a deep-layered subtropical ridge to the north. A microwave imagery revealed a small intense convective core and improved convective bands over the southern semi-circle, as well as the radial outflow supported the ongoing intensification. Late on the same day, JTWC upgraded Neoguri to a super typhoon for its contracted eyewall, although the secondary outer eyewall had begun to form. Simultaneously, JMA analysed that Neoguri had reached peak intensity, with ten-minute maximum sustained winds at and atmospheric pressure at . Early on July 7, Neoguri began to track north-northwestwards along the southwest extension of a deep-layered subtropical ridge, when JTWC reported that Neoguri had reach peak intensity as a Category 4 super typhoon with one-minute maximum sustained winds at . However, this was increased to in the best track, an upgrade to Category 5 super typhoon status. Under the influence of a very favourable environment, the system had an expansive areal coverage as tightly curved deep convective bands, mostly feeding from the southern flank, wrapped even tighter into the expanding and nearly annular eye. However, the deep convection of the northwestern flank was almost eroded at noon, yet the round eye maintained very well, prompting JTWC downgrading Neoguri to a typhoon late on the same day. Although a digging mid-latitude trough was amplifying the upper-level poleward outflow and helping to maintain the intensity, it increased subsidence along the northwestern quadrant of Neoguri, which significantly hindered the development and caused a weakening trend. From the evening to early July 8, overall convection of Neoguri significantly increased, when the typhoon began to turn northwards. Later, Neoguri passed between Miyako-jima and Okinawa Island, right before starting to weaken gradually. In the afternoon, convection of Neoguri began to diminish, as well as a noticeable dry slot formed along the eastern semi-circle. The eye became obscured late on the same day, when the interaction with mid-latitude westerly trough was increasing. Early on July 9, increasing vertical wind shear along the northwestern quadrant of Neoguri made deep convection erode very significantly. Soon, JMA downgraded the system to a severe tropical storm when sharply turning eastwards, and cold stratocumulus clouds were streaming into a defined but elongating low-level circulation centre. JTWC downgraded Neoguri to a tropical storm at noon, when the system was tracking along the periphery of the subtropical ridge modified by an approaching mid-latitude trough. Right before 07:00 JST on July 10 (22:00 UTC on July 9), Neoguri made landfall near Akune, Kagoshima, and the system began to accelerate east-northeastwards.〔 Convection later continued to be greatly sheared southeastwards from the low-level circulation centre which was too broad, elongated, and unravelled to pinpoint, although the poleward outflow enhanced by the strong mid-latitude westerlies continued providing ventilation to the remnant wayward convection. After Neoguri made landfall over the southern part of Wakayama Prefecture around 18:30 JST (09:30 UTC on July 10), JTWC issued the final warning to the fully exposed storm which was becoming extratropical with the forming frontal characteristics at noon, as well as JMA downgraded it to a tropical storm.〔 Neoguri then passed through Izu Peninsula around 02:30 JST on July 11 (17:30 UTC on July 10) and made landfall over Futtsu, Chiba right before 05:00 JST (20:00 UTC on July 10).〔 Early on July 11, Neoguri became an extratropical cyclone east of the Kantō region and continued moving northeastwards. After passing through Iturup and turning northwards late on the same day, the storm became below gale intensity at noon on July 12. Neoguri completely dissipated in the Sea of Okhotsk one day later. 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「Typhoon Neoguri (2014)」の詳細全文を読む スポンサード リンク
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