17號颱風parma #2 - 颱風討論

By Yuri
at 2009-10-02T12:09
at 2009-10-02T12:09
Table of Contents
芭瑪颱風從昨天到今晨 , 有減弱的現象
不過從今天早上開始已經回穩 , 11點的可見光已經看得到風眼
加上他即將進入西北太平洋海溫最高的區域之一 強度應會再次增強
就路徑方面 , 過去六小時仍然偏向西北西, 但從駛流場上觀察(取300-850) , 氣流的轉變
其實蠻快的 , 高壓從颱風東邊往南伸的脊線一直在增強 ,目前向西和向北的導引氣流已經
打平, 從CWB網站上的500hpa分歧場看來 , 未來高壓在北邊的脊線會逐漸減弱 , 而在颱風
東邊的脊線有可能進一步往颱風東南面伸 , 轉西北-北北西的時間應該今晚到明晨左右就
會到達.
這個颱風過去雖略有減速 , 但還是一直在20km/h上下 , 也許可作為未來的參考.
至於米勒颱風 , 過去移動速度偏慢 , 未來和芭瑪颱風發生明顯互動的機會 , 個人是覺得
偏低. 其中一個主要原因是兩個颱風間目前存在一個不弱的高壓區域(即前面提到高壓從
芭瑪東邊往南伸的脊線).
兩個颱風並未處於同一個低壓區中 , 未來看來米勒要突破這點並不容易.
目前數值預報仍然不很一致 , 即使是三大氣象單位的預報也不一致(jtwc,cwb vs jma)
近期觀察轉向的時間點早或晚 , 速度快或慢 , 今晚到明午應該就能看出比較可能的結果
, 登陸呂宋東北角然後往偏西到西北緩慢移動並不是唯一解 , 從台灣東邊近海北上的機會
仍然不低 . 以上僅供參考.
--
不過從今天早上開始已經回穩 , 11點的可見光已經看得到風眼
加上他即將進入西北太平洋海溫最高的區域之一 強度應會再次增強
就路徑方面 , 過去六小時仍然偏向西北西, 但從駛流場上觀察(取300-850) , 氣流的轉變
其實蠻快的 , 高壓從颱風東邊往南伸的脊線一直在增強 ,目前向西和向北的導引氣流已經
打平, 從CWB網站上的500hpa分歧場看來 , 未來高壓在北邊的脊線會逐漸減弱 , 而在颱風
東邊的脊線有可能進一步往颱風東南面伸 , 轉西北-北北西的時間應該今晚到明晨左右就
會到達.
這個颱風過去雖略有減速 , 但還是一直在20km/h上下 , 也許可作為未來的參考.
至於米勒颱風 , 過去移動速度偏慢 , 未來和芭瑪颱風發生明顯互動的機會 , 個人是覺得
偏低. 其中一個主要原因是兩個颱風間目前存在一個不弱的高壓區域(即前面提到高壓從
芭瑪東邊往南伸的脊線).
兩個颱風並未處於同一個低壓區中 , 未來看來米勒要突破這點並不容易.
目前數值預報仍然不很一致 , 即使是三大氣象單位的預報也不一致(jtwc,cwb vs jma)
近期觀察轉向的時間點早或晚 , 速度快或慢 , 今晚到明午應該就能看出比較可能的結果
, 登陸呂宋東北角然後往偏西到西北緩慢移動並不是唯一解 , 從台灣東邊近海北上的機會
仍然不低 . 以上僅供參考.
--
Tags:
颱風
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