鳳凰逐漸西偏,注意路徑變化~2014/09/19 - 颱風討論

By Necoo
at 2014-09-19T16:45
at 2014-09-19T16:45
Table of Contents
鳳凰颱風中心大概在今天中午左右順利登陸呂宋島東北角,
隨後受到地形影響而偏西運動,因為受到地形干擾,結構調整的關係,
颱風中心在陸地上移動迅速,快速向呂宋島西北角移動,
可能會在入夜後出海,進入呂宋西北角海域。
接下來就是轉向的關鍵點了,由綜觀環境來看,
西側位於海南島附近的高壓單體越來越弱,對於颱風的影響也越來越小,
相對的,颱風東側的太平洋高壓主體給予颱風一個北偏的引導力量,
加上北邊的鋒面及短波槽東移,今晚到明天會逐漸通過台灣以北,
因此太平洋高壓主體不太容易在颱風北側向西伸展,反而是會在颱風南側向西伸展,
因此看起來鳳凰大概只能轉彎後往北上來,唯一的出路跟缺口在這邊。
但是颱風在陸地上移動速度很快,因此出海後在慣性作用下有可能還會往西移動一段,
慢慢脫離地形地干擾後,速度將較為減慢,然後受到東側的偏北駛流引導向北偏轉,
由於轉向點可能比先前預估稍往西調整,
因此北轉後不能排除會趨向高屏一帶沿海的機會,但是目前還說不準,
走東岸跟走西岸機率各半,還要觀察出海後颱風結構的調整而定。
預估颱風暴風圈邊緣大概明天中午會接觸恆春半島陸地,
隨後由南往北陸續涵蓋其他各地,陸上警報預估傍晚5點30分發出,
警報範圍也將是由南往北擴大,這次看起來應該全台灣都會進入警報範圍內。
颱風中心大概在明天入夜後會靠近陸地,但是會在哪裡進來仍有待觀察。
這種由南往北的路徑,走西岸跟走東岸的影響差異會比較大,
特別是週六晚間到週日一整天,
明天周六白天的風雨大概都會先是恆春半島、台東、花蓮等地首當其衝,
走東岸北上的話,明晚到後天清晨這段時間風雨會慢慢往北延伸到宜蘭、雙北市,
週日下半天則會再轉移到桃竹苗一帶山區,尤其是當颱風中心北上到宜蘭附近時,
風向開始轉西北風,雪山西坡降雨明顯增加,
較強降雨區也有可能往南延伸到中部、南部山區,有可能會一直持續到周日深夜以後,
颱風逐漸脫離,各地風雨趨緩。
走西岸北上的話,南高屏、恆春半島及台東地區受到的衝擊會最大,
然後隨著颱風北上,影響會慢慢擴大到中部、花蓮、宜蘭等地,
北部地區可能相對受到的影響相對會小得多,
這條路徑對於高雄氣爆災區不是好消息,一定要特別注意。
當然中心登陸的話,受到地形干擾,颱風路徑就會比較難以掌握了。
大致上來看這個颱風影響最大的時間集中在周六晚間到周日一整天,
要到周日深夜以後才會慢慢脫離台灣附近,整體影響時間還是蠻長的,一定要特別注意。
最後就是這個颱風有無共伴? 看起來應該是沒有,鋒面勢力弱,位置偏北,
跟颱風就算有交互作用應該也是會落在台灣以北的海面上,
台灣大概就是直接受到颱風環流影響,不至於有共伴發生。
颱風北上後會不會有西南氣流? 看起來會有西南風持續,把水氣從台灣西南邊帶上來,
中南部持續有下雨機會,不過目前來看風速不強,還不到西南"氣流"的程度。
以上簡單供參考囉~
--
隨後受到地形影響而偏西運動,因為受到地形干擾,結構調整的關係,
颱風中心在陸地上移動迅速,快速向呂宋島西北角移動,
可能會在入夜後出海,進入呂宋西北角海域。
接下來就是轉向的關鍵點了,由綜觀環境來看,
西側位於海南島附近的高壓單體越來越弱,對於颱風的影響也越來越小,
相對的,颱風東側的太平洋高壓主體給予颱風一個北偏的引導力量,
加上北邊的鋒面及短波槽東移,今晚到明天會逐漸通過台灣以北,
因此太平洋高壓主體不太容易在颱風北側向西伸展,反而是會在颱風南側向西伸展,
因此看起來鳳凰大概只能轉彎後往北上來,唯一的出路跟缺口在這邊。
但是颱風在陸地上移動速度很快,因此出海後在慣性作用下有可能還會往西移動一段,
慢慢脫離地形地干擾後,速度將較為減慢,然後受到東側的偏北駛流引導向北偏轉,
由於轉向點可能比先前預估稍往西調整,
因此北轉後不能排除會趨向高屏一帶沿海的機會,但是目前還說不準,
走東岸跟走西岸機率各半,還要觀察出海後颱風結構的調整而定。
預估颱風暴風圈邊緣大概明天中午會接觸恆春半島陸地,
隨後由南往北陸續涵蓋其他各地,陸上警報預估傍晚5點30分發出,
警報範圍也將是由南往北擴大,這次看起來應該全台灣都會進入警報範圍內。
颱風中心大概在明天入夜後會靠近陸地,但是會在哪裡進來仍有待觀察。
這種由南往北的路徑,走西岸跟走東岸的影響差異會比較大,
特別是週六晚間到週日一整天,
明天周六白天的風雨大概都會先是恆春半島、台東、花蓮等地首當其衝,
走東岸北上的話,明晚到後天清晨這段時間風雨會慢慢往北延伸到宜蘭、雙北市,
週日下半天則會再轉移到桃竹苗一帶山區,尤其是當颱風中心北上到宜蘭附近時,
風向開始轉西北風,雪山西坡降雨明顯增加,
較強降雨區也有可能往南延伸到中部、南部山區,有可能會一直持續到周日深夜以後,
颱風逐漸脫離,各地風雨趨緩。
走西岸北上的話,南高屏、恆春半島及台東地區受到的衝擊會最大,
然後隨著颱風北上,影響會慢慢擴大到中部、花蓮、宜蘭等地,
北部地區可能相對受到的影響相對會小得多,
這條路徑對於高雄氣爆災區不是好消息,一定要特別注意。
當然中心登陸的話,受到地形干擾,颱風路徑就會比較難以掌握了。
大致上來看這個颱風影響最大的時間集中在周六晚間到周日一整天,
要到周日深夜以後才會慢慢脫離台灣附近,整體影響時間還是蠻長的,一定要特別注意。
最後就是這個颱風有無共伴? 看起來應該是沒有,鋒面勢力弱,位置偏北,
跟颱風就算有交互作用應該也是會落在台灣以北的海面上,
台灣大概就是直接受到颱風環流影響,不至於有共伴發生。
颱風北上後會不會有西南氣流? 看起來會有西南風持續,把水氣從台灣西南邊帶上來,
中南部持續有下雨機會,不過目前來看風速不強,還不到西南"氣流"的程度。
以上簡單供參考囉~
--
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颱風
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