薔蜜颱風-0926 - 颱風討論
By Agnes
at 2008-09-26T23:02
at 2008-09-26T23:02
Table of Contents
今天白天薔蜜的動態大致以預期的西北方向移動
不過在槽線持續東移南壓轉直的情況下
槽前冷鋒逐漸橫過東海南移
目前已經到了台灣北部海面了~鋒前已經開始有雲層進入北部東北部帶來降雨
琉球附近的高壓逐漸東退並且跟副高壓主體合併
颱風在這種逐漸調整的環境下走向有點搖擺~速度也時快時慢
只是大方向朝向西北沒有錯
以晚間的資料來看
北邊的西風槽轉直東移的相當快
現在已經在通過黃海中~大致由中國東北往南南西經朝鮮半島延伸到華東一帶
今晚將繼續掠過颱風以北~朝日本附近移動
鋒面尾端將在今晚掃過北台灣~東北季風隨之南下
鋒面通過時配合地形影響北部東北部將有局部較大雨勢出現
槽線跟鋒面繼續東進的過程中
東環高壓主體會繼續東退南壓~慢慢在颱風東側調整呈南北向
跟西環高壓之間的弱點區加大~颱風速度可能會從明天白天起開始放慢
方向忽西忽北的情況今晚到明天白天仍將持續~大致應該仍是西北為主~
但是隨著槽後脊跟西環高壓重合使它擴張東伸
底層東北季風冷空氣也自北面壓下來
預估薔蜜的移動方向偏西角度明天白天會逐漸加大
這一段轉折的過程是最難預測的
目前各預報差異較大的也在這裡
不過今天陸續出來的資料顯示~颱風的移動速度可能會持續有較快現象
即使明天開始放慢似乎也不會慢太多
西環高壓的接手時間點應該會比昨天的看法要來得早
因此明晚的中心位置應該會比昨天預期的更靠近台灣一些
有可能已經來到20~21N~124.5~125.5E這一個方塊的區域
以現在的暴風圈半徑250公里來看~應該稍後或是明天清晨前就得發布海上警報了
陸上警報則緊接著在明天上午到中午之間就有發布的機會
後天週日颱風就真正要影響台灣了
週日晚間颱風中心預期已經在台東或恆春的近海
如果西折的角度較小~很有可能在週日深夜登陸台灣東南部到恆春半島一帶
下週一進入台灣海峽後將遇上北邊後續的短波槽
西環高壓的引導力將逐漸消退~東環高壓則有趁虛而入的機會
加上短波槽的牽引~方向逐漸偏北的機會頗高
到時候颱風強度應該已經大幅減弱了
只是降雨的情況預期仍會非常明顯
因此週一受到颱風的影響仍會相當大
至少要到週二才會有隨著颱風更為減弱北移~風雨緩和下來的機會
以上簡單供參考~提醒大家務必提早做好防颱準備囉~
--
不過在槽線持續東移南壓轉直的情況下
槽前冷鋒逐漸橫過東海南移
目前已經到了台灣北部海面了~鋒前已經開始有雲層進入北部東北部帶來降雨
琉球附近的高壓逐漸東退並且跟副高壓主體合併
颱風在這種逐漸調整的環境下走向有點搖擺~速度也時快時慢
只是大方向朝向西北沒有錯
以晚間的資料來看
北邊的西風槽轉直東移的相當快
現在已經在通過黃海中~大致由中國東北往南南西經朝鮮半島延伸到華東一帶
今晚將繼續掠過颱風以北~朝日本附近移動
鋒面尾端將在今晚掃過北台灣~東北季風隨之南下
鋒面通過時配合地形影響北部東北部將有局部較大雨勢出現
槽線跟鋒面繼續東進的過程中
東環高壓主體會繼續東退南壓~慢慢在颱風東側調整呈南北向
跟西環高壓之間的弱點區加大~颱風速度可能會從明天白天起開始放慢
方向忽西忽北的情況今晚到明天白天仍將持續~大致應該仍是西北為主~
但是隨著槽後脊跟西環高壓重合使它擴張東伸
底層東北季風冷空氣也自北面壓下來
預估薔蜜的移動方向偏西角度明天白天會逐漸加大
這一段轉折的過程是最難預測的
目前各預報差異較大的也在這裡
不過今天陸續出來的資料顯示~颱風的移動速度可能會持續有較快現象
即使明天開始放慢似乎也不會慢太多
西環高壓的接手時間點應該會比昨天的看法要來得早
因此明晚的中心位置應該會比昨天預期的更靠近台灣一些
有可能已經來到20~21N~124.5~125.5E這一個方塊的區域
以現在的暴風圈半徑250公里來看~應該稍後或是明天清晨前就得發布海上警報了
陸上警報則緊接著在明天上午到中午之間就有發布的機會
後天週日颱風就真正要影響台灣了
週日晚間颱風中心預期已經在台東或恆春的近海
如果西折的角度較小~很有可能在週日深夜登陸台灣東南部到恆春半島一帶
下週一進入台灣海峽後將遇上北邊後續的短波槽
西環高壓的引導力將逐漸消退~東環高壓則有趁虛而入的機會
加上短波槽的牽引~方向逐漸偏北的機會頗高
到時候颱風強度應該已經大幅減弱了
只是降雨的情況預期仍會非常明顯
因此週一受到颱風的影響仍會相當大
至少要到週二才會有隨著颱風更為減弱北移~風雨緩和下來的機會
以上簡單供參考~提醒大家務必提早做好防颱準備囉~
--
Tags:
颱風
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