凡那比颱風~10/09/18
在高壓引導下~凡那比早上持續往西到西北西移動
路線似乎稍稍偏北一點~但是看起來比較像是內部眼牆的調整
從JMA的雷達來看~這颱風似乎已經有雙眼牆的現象
內眼受外眼渦度旋轉的影響~走向有時候會飄忽一些
不過從駛流環境來看大致仍會是偏西在走~仍將持續往花蓮市或北邊一點的地方靠近
颱風強度應該已經到頂了~未來將以維持強度為主~一直到登陸
只是事事多變化~強度會不會就此封頂仍要留意~
http://ppt.cc/IN9_
預估颱風暴風圈邊緣碰到台灣東半部陸地的時間將落在今天深夜左右
慢一點應該到明天凌晨過後也要碰到了
中心登陸的時間暫時仍是抓在明天中午前後
但是一再提醒大家要注意當颱風中心通過123E線之後跟台灣地形可能的互動
有可能打轉後順利過山~或是打轉後高低層分裂過山
當然也有可能不打轉~只是稍微南偏後就被推過山去
不過歷史經驗看起來~跟地形互動的機會應該是比較大的
而當中心跟地形產生互動~颱風登陸的時間跟地點就會產生微妙的變化
這一點要請大家持續密切注意實際的變化情況
特別是明天清晨開始的實際演變
跟地形互動當然會拖到它影響的時間~越明顯則會拖越久
但是目前看起來並沒有像莫拉克那樣的可怕~
莫拉克可怕之處在於它影響的時間太長~環境又配合它不斷的往台灣輸送水氣
這一回凡那比還看不出有相同的條件
凡那比結構紮實完整~目前北台灣雖然開始有一陣一陣的雨勢~
北部東北部跟西部沿海的陣風也慢慢出現~但是都還不是很顯著
預估等到今天深夜~颱風暴風圈開始進來後~迎風面的北部東半部風雨將急劇增強
特別是花蓮~宜蘭~基隆北海岸以及台北地區~風雨起來的情況會相當明顯
桃竹苗地區也會開始有較大的風雨出現
西部沿海的陣風將持續加大~中部南部要開始嚴防風向輻合可能帶來的降雨
台東地區北風較強~當風向隨風圈進來繼續轉為明顯的西北風過山下沉時將轉為焚風
目前看起來這颱風風雨將是快速增強但緩和較慢的類型
明天全台灣都要嚴防強風暴雨~特別是花蓮宜蘭基隆北海岸台北桃園以及竹苗等地
中南部跟東南部也要密切注意颱風回南的風雨
離真正的強風豪雨還有一點時間~再度請大家盡早準備~
祝大家一切平安~以上供參考囉~
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