蓮花颱風海上警報~09/06/19 - 颱風討論

By Daph Bay
at 2009-06-19T22:55
at 2009-06-19T22:55
Table of Contents
經過一段時間的耐心等待~蓮花終於動了
繞完一個圈後順勢開始往北北東偏移
如預期的推動它移動還是來自於南邊較低緯度的副高壓
不過推動的形勢還是有些意料之外
93W取代90W後逐漸東移~跟蓮花之間拉開了距離
兩者之間產生的相對高壓區讓副高壓取得了機會硬是稍為擠進來
因此讓蓮花的移動角度較為偏北
但是整個大環境並沒有太大變化
副高壓整個緯度還是偏南而且偏東強度偏弱
北邊在華北很快又有西風槽要東移
因此對於路線的看法也大致不變
可能會繼續走向北北東~
後期進入台灣海峽南部後仍有細部變化的機會
有可能因為西風槽以及副高壓共同的影響而稍微往東偏
對台灣的威脅仍然很大~特別是右側的寬廣雲帶以及西南尾的豐沛水氣
另外還有一個變數就是台灣以東海面下午到晚間逐漸轉出了冷心低壓
看起來是高空(200~300百帕)槽明顯南伸而割離的結果
未來中層西風槽東移後是否會產生疊加效果值得觀察
有可能讓蓮花出現更大角度的往東偏轉
強度方面在短時間內還有再增強的可能
特別是北側的輻散通道因為高層槽南伸的關係有好轉的趨勢
但是逐漸靠近台灣海峽後因為環境垂直風切越來越強~強度發展應該就會受到限制
明天白天的天氣在東半部以及南部~恆春半島受到颱風外圍環流接近影響
將逐漸轉為有陣雨的天氣~對流較旺盛的情況下也可能出現雷雨
北部中部雲量較多~雲層如果能過山就會帶來局部短暫陣雨
午後配合熱力效果也可能發展出熱對流雷雨胞
明天晚間颱風主體環流將逐漸進入台灣海峽南部
迎風面的降雨將會更為明顯~沿海的陣風也將增強
颱風路線越靠近台灣則風雨會越顯著
這種從南往北的颱風右側環流通常都有大範圍的氣流跟著
因此迎風地區的風勢雨勢應該都會蠻大的
外島的澎湖風雨也會逐漸加強~
後天週日就要看颱風如何通過台灣海峽了~基本上將是各地有雨的天氣
如果真的往東偏~則對台灣的風雨影響就會相當明顯
即使持續偏北從海峽北上~颱風右側南側的環流雲帶以及西南氣流會持續帶來風雨
尤其是中南部要特別小心留意
澎湖則可能首當其衝~風雨應該會相當強
明後天打算安排活動的朋友可能都要多考慮一下了
以上先簡單供參考囉~
--
繞完一個圈後順勢開始往北北東偏移
如預期的推動它移動還是來自於南邊較低緯度的副高壓
不過推動的形勢還是有些意料之外
93W取代90W後逐漸東移~跟蓮花之間拉開了距離
兩者之間產生的相對高壓區讓副高壓取得了機會硬是稍為擠進來
因此讓蓮花的移動角度較為偏北
但是整個大環境並沒有太大變化
副高壓整個緯度還是偏南而且偏東強度偏弱
北邊在華北很快又有西風槽要東移
因此對於路線的看法也大致不變
可能會繼續走向北北東~
後期進入台灣海峽南部後仍有細部變化的機會
有可能因為西風槽以及副高壓共同的影響而稍微往東偏
對台灣的威脅仍然很大~特別是右側的寬廣雲帶以及西南尾的豐沛水氣
另外還有一個變數就是台灣以東海面下午到晚間逐漸轉出了冷心低壓
看起來是高空(200~300百帕)槽明顯南伸而割離的結果
未來中層西風槽東移後是否會產生疊加效果值得觀察
有可能讓蓮花出現更大角度的往東偏轉
強度方面在短時間內還有再增強的可能
特別是北側的輻散通道因為高層槽南伸的關係有好轉的趨勢
但是逐漸靠近台灣海峽後因為環境垂直風切越來越強~強度發展應該就會受到限制
明天白天的天氣在東半部以及南部~恆春半島受到颱風外圍環流接近影響
將逐漸轉為有陣雨的天氣~對流較旺盛的情況下也可能出現雷雨
北部中部雲量較多~雲層如果能過山就會帶來局部短暫陣雨
午後配合熱力效果也可能發展出熱對流雷雨胞
明天晚間颱風主體環流將逐漸進入台灣海峽南部
迎風面的降雨將會更為明顯~沿海的陣風也將增強
颱風路線越靠近台灣則風雨會越顯著
這種從南往北的颱風右側環流通常都有大範圍的氣流跟著
因此迎風地區的風勢雨勢應該都會蠻大的
外島的澎湖風雨也會逐漸加強~
後天週日就要看颱風如何通過台灣海峽了~基本上將是各地有雨的天氣
如果真的往東偏~則對台灣的風雨影響就會相當明顯
即使持續偏北從海峽北上~颱風右側南側的環流雲帶以及西南氣流會持續帶來風雨
尤其是中南部要特別小心留意
澎湖則可能首當其衝~風雨應該會相當強
明後天打算安排活動的朋友可能都要多考慮一下了
以上先簡單供參考囉~
--
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