天氣概況~2013/08/26~注意TD-14W變化 - 颱風討論

By Rae
at 2013-08-26T11:09
at 2013-08-26T11:09
Table of Contents
早上比較忙~現在簡單來聊一下天氣~
過去這兩天雖然高壓增強西伸~但是強度並不是很強的感覺~
午後雷雨仍然可以長的出來~局部較大雨勢也還是有出現~
只是範圍較為縮減~雨量也減少一些~
目前大家的焦點都放在菲律賓東方的TD-14W身上~
這個系統在向西移動後逐漸接上西南季風並且有所發展~
不過雲層結構整理的不是很好~高低層的風向差異較大(垂直風切)~
導致對流雲團較偏向LLCC的西南側~中心環流呈現外露~
強度增強的狀況應該會比較慢~但系統範圍較小~這是對其發展較為有利的一點~
預估未來24小時內仍有很大機會摸到輕度颱風門檻~
動態方面的變數還蠻大的~
目前高壓的勢力有開始向東調整的跡象~
模式預測也大多顯示高壓型態有調整為偏南北走向的機會~
因此14W將繼續向比較偏北到北北西的方向移動~
明天(27號)就會接近台灣東南方海域~後天(28號)就將要進入臺灣以東~
未來這24小時內北上的角度以及高壓形狀調整的變化趨勢都很關鍵~
如果高壓調整的速度較快~導致14W比較偏北而行的話~
來到臺灣以東時距離就會較遠~方向也較為偏離台灣~影響就會較小~
相對的14W也可能比較靠近台灣近海北上~影響就會比較大了~
另一個變數是這個系統的結構~
如果對流雲團持續偏向系統西南側~可能多少會把LLCC跟著往西拖帶~
也就是對岸網友一直戲稱的"風神定律"~
簡單來講即為強對流雲團底層輻合區及正渦度區吸引LLCC趨向的一種情況
這種情況在結構不穩定的弱颱風或是不對稱型態的颱風中比較有可能發生~
駛流不明顯的話發生的機會更大~
這次的14W預估正好是強度不強~結構也比較不對稱的狀況~
會不會造成LLCC移動的變化很值得觀察~
今天台灣仍不受14W影響~維持夏季型態的天氣~
注意山區午後的熱對流發展狀況~仍有局部較大降雨出現的機會~
到山區活動的朋友請多加小心~
西半部靠近山區的平地也會有出現午後降雨的可能~
明天白天目前來看應該還是比較好的天氣~特別是14W外圍的下沉氣流影響~
午後對流的發展可能更受到壓制~但是山區應該還是會有些午後雷雨的機會~
明晚起14W外圍環流可能開始影響到迎風面的天氣~降雨機會增高~
後天以後就必須看14W的動態了~天氣好壞可能會差異很大~
以上簡單供參考囉~
--
過去這兩天雖然高壓增強西伸~但是強度並不是很強的感覺~
午後雷雨仍然可以長的出來~局部較大雨勢也還是有出現~
只是範圍較為縮減~雨量也減少一些~
目前大家的焦點都放在菲律賓東方的TD-14W身上~
這個系統在向西移動後逐漸接上西南季風並且有所發展~
不過雲層結構整理的不是很好~高低層的風向差異較大(垂直風切)~
導致對流雲團較偏向LLCC的西南側~中心環流呈現外露~
強度增強的狀況應該會比較慢~但系統範圍較小~這是對其發展較為有利的一點~
預估未來24小時內仍有很大機會摸到輕度颱風門檻~
動態方面的變數還蠻大的~
目前高壓的勢力有開始向東調整的跡象~
模式預測也大多顯示高壓型態有調整為偏南北走向的機會~
因此14W將繼續向比較偏北到北北西的方向移動~
明天(27號)就會接近台灣東南方海域~後天(28號)就將要進入臺灣以東~
未來這24小時內北上的角度以及高壓形狀調整的變化趨勢都很關鍵~
如果高壓調整的速度較快~導致14W比較偏北而行的話~
來到臺灣以東時距離就會較遠~方向也較為偏離台灣~影響就會較小~
相對的14W也可能比較靠近台灣近海北上~影響就會比較大了~
另一個變數是這個系統的結構~
如果對流雲團持續偏向系統西南側~可能多少會把LLCC跟著往西拖帶~
也就是對岸網友一直戲稱的"風神定律"~
簡單來講即為強對流雲團底層輻合區及正渦度區吸引LLCC趨向的一種情況
這種情況在結構不穩定的弱颱風或是不對稱型態的颱風中比較有可能發生~
駛流不明顯的話發生的機會更大~
這次的14W預估正好是強度不強~結構也比較不對稱的狀況~
會不會造成LLCC移動的變化很值得觀察~
今天台灣仍不受14W影響~維持夏季型態的天氣~
注意山區午後的熱對流發展狀況~仍有局部較大降雨出現的機會~
到山區活動的朋友請多加小心~
西半部靠近山區的平地也會有出現午後降雨的可能~
明天白天目前來看應該還是比較好的天氣~特別是14W外圍的下沉氣流影響~
午後對流的發展可能更受到壓制~但是山區應該還是會有些午後雷雨的機會~
明晚起14W外圍環流可能開始影響到迎風面的天氣~降雨機會增高~
後天以後就必須看14W的動態了~天氣好壞可能會差異很大~
以上簡單供參考囉~
--
Tags:
颱風
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