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Severe Tropical Storm Linfa, known in the Philippines as Severe Tropical Storm Egay, was a tropical cyclone which affected the northern Philippines, Taiwan and southern China in early July 2015. The tenth named storm of the annual typhoon season, Linfa was first discovered as a weak tropical disturbance over in the Philippine Sea, embedded in an active Intertropical Convergence Zone on June 30. The disturbance gradually intensified, and was upgraded to a tropical depression by the JMA and PAGASA on July 1. The JTWC followed suit the next day, whilst the JMA upgraded the depression to Tropical Storm Linfa. Both Linfa and Chan-hom, combined with the southwest monsoon, brought heavy rainfall and flooding throughout the Philippines for several days. ==Meteorological history== A weak low-pressure area developed into a tropical disturbance near Palau on June 30. The system stalled over the Philippine Sea for several hours, and there was initially no intensification of the system. However, several hours later, the system began to organize into a tropical depression according to the JMA. By the early hours of July 2, the tropical depression showed an increase of deep convection which allowed it to intensify further. With this, the JTWC upgraded the system to a tropical depression, designating it as ''10W''. The PAGASA also issued their first advisory on the system, naming it as ''Egay''. Later in the same day, the tropical depression was upgraded to a weak tropical storm by both the JMA and JTWC, with the JMA naming it as ''Linfa''.〔(【引用サイトリンク】url=http://www.webcitation.org/6ZkYpcswN )〕 On July 3, Linfa entered an area of favorable conditions with low to moderate vertical wind shear and warm sea-surface temperatures. Good outflow also surrounded the system. Linfa then intensified into a severe tropical storm.〔(【引用サイトリンク】url=http://www.webcitation.org/6ZkYnoogq )〕 A central dense overcast developed over the circulation of Linfa, and with a slow southwesterly track, the favorable environments had now reduced to fair which Linfa had now retained its intensity. By the evening of July 4, the center of Linfa made landfall over Palanan, Isabela.〔(【引用サイトリンク】url=http://www.breakingnews.com/item/2015/07/04/tropical-storm-linfa-egay-makes-landfall-over-pa/ )〕〔(【引用サイトリンク】url=http://www.gmanetwork.com/news/story/516030/weather/egay-makes-landfall-over-palanan-isabela-signal-2-up-over-6-areas )〕 Due to land reaction, Linfa's Low-level Circulation Center (LLCC) and convection became disorganized, however windspeeds around the system remained the same.〔(【引用サイトリンク】url=http://www.webcitation.org/6Zp3lM3bT )〕 The JMA downgraded the system to a tropical storm a few hours later as it entered the South China Sea.〔(【引用サイトリンク】url=http://www.webcitation.org/6Zp3jhfNL )〕 Later the same day, the JTWC had assessed an increase of Linfa's windspeeds and good organization started to form again. By July 6, Linfa encountered moderate to high vertical wind shear. Its LLCC became fully exposed, and both the JMA and the JTWC lowered Linfa's intensity.〔(【引用サイトリンク】url=http://www.webcitation.org/6Zp3awEHx )〕 In the next several hours, Linfa maintained its intensity as it moved in a northerly projection really slowly as it was located around a few miles west of southwest of Taiwan, whilst the PAGASA issued its final bulletin on the storm as it exited their area of responsibility.〔()〕〔(【引用サイトリンク】url=http://ndrrmc.gov.ph/attachments/article/2478/Severe_Weather_Bulletin_No_20_Final_re_TS_Egay_and_Gale_Warning_No._10A_issued_on_07JULY2015.pdf )〕 The next day, Linfa entered another area of favorable conditions, so both the JMA and JTWC slightly raised Linfa's wind speed. Linfa reached a secondary peak late on July 8, but this time it was stronger than before, with the JTWC assessing 1-minute sustained winds of , Category 1 typhoon strength. However, the JMA maintained Linfa's intensity at severe tropical storm strength, although with a lower minimum pressure of 975 mbar. 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 Linfa (2015)」の詳細全文を読む スポンサード リンク
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