Re: 天氣概況~2009/10/19~盧碧回頭中~
今天一天下來盧碧已經如預期的回頭轉向西北西移動~速度不算太快~
剛回頭時角度較小~後來轉西的分量逐漸加大~
整體的緯度已經比預期的要高了~
因此目前看起來盧碧再被更往西壓制之前有機會越過20N線
原本在朝鮮半島的西風槽已經開始進入日本海並繼續東移~有淺化的趨勢
琉球經台灣到華南呈現反氣旋區域
西環高壓勢力重建且有繼續加強的趨勢
東環高壓主體也慢慢往颱風北方延伸
明天應該會開始進入兩邊高壓重新連接的階段
預估盧碧的方向將更偏西~速度也有加快的機會
模式預估仍然普遍認為盧碧未來會往西南西偏轉
看起來還是跟副高壓在颱風西北面強力的阻擋有關
往南掉的路線預估會在24小時後開始出現~
但是否真的會開始南掉~或是南偏的角度有多大還需要密切觀察
乾空氣對颱風強度的影響在入夜後更為明顯
有效的抑制了對流發展~颱風也因此減弱
當然雙眼的過程也是強度下降的很大原因
目前雙眼結構還在持續中~外眼牆被乾空氣影響變得不太完整
何時能完成眼牆置換過程還很難講
強度應該還有再往下調整的機會
值得注意的是華南逐漸有水氣順著西風往東飄
颱風前方的乾燥區域正在縮小減弱
同時南海的93W也把西南季風往北帶
對盧碧強度不利的因素似乎正在減小
但要再增強最後還是得等到雙眼的置換結束
侵襲呂宋前能否完成須要觀察~
以上簡單供參考囉~
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