天氣概況~2009/06/26 - 颱風討論

By Suhail Hany
at 2009-06-26T09:39
at 2009-06-26T09:39
Table of Contents
經過一夜~南卡碰到了在巴士海峽處略為往西突出的高壓邊緣
路線明顯的往西北轉了一下~到了最近這1~2個小時又回到偏北的方向前進
目前它的中心正在逐漸靠近東沙島附近海域
外圍的環流雲層則慢慢的進入台灣海峽南部到廣東海面一帶
而且往北延伸的速度還蠻快的~顯示引導氣流仍然明顯
結構上則仍然未見改善~LLCC持續外露
雖然本身環流內受到西南風水氣供應以及高層輻散良好的幫助有對流爆發
但是LLCC移動迅速~對流雲難以整理鞏固到中心周圍
較強環境風切的負面作用也陰魂不散的跟著它
強度要有所增強的可能性已經有限
路線方面也大致確定了~引導氣流仍強~高壓勢力在今天變化不大
預估會讓南卡繼續往廣東汕頭到汕尾之間的沿海靠近~甚至更偏到汕尾以西的地方
昨晚往西北偏了一點~使得預期登陸的地方跟著往西修正
颱風本身對台灣的影響也會再小一些
這一回的南卡颱風很多人都拿來跟去年的風神比較
但是個人覺得兩者的情況有異也有同
去年的風神是高壓中心位置在台灣以東~勢力強大~華中東移的槽線無法撼動高壓
最後導致預期颱風順轉的路線失敗~實際路線整個往西偏
今年的南卡則是高壓從一開始就偏東~勢力不強~高壓邊緣在菲律賓到台灣附近
大陸東岸有槽區停留~地面鋒面的位置偏南
整體的形式來看預測颱風會順轉是相當正常的事情
不過已經6月底的環境~高壓的強度仍是比預期的稍強
邊緣出現略為偏西的情況~槽線則出現淺化北縮的趨勢
最後導致南卡的實際路線也比預期的往西修正
跟風神相同的是高壓的強度最後都強於預測~只是一個是打死不退~另一個是奮力突破
看起來以後這種季節性的背景因素還是要多加考慮才行
當初也是因為無法判斷出高壓究竟會比預期的強還是弱~
所以在關鍵區的路線一直都只能告訴大家有兩種可能
最後高壓仍在季節轉換的背景下比預期強~
昨晚這種跡象已經相當明顯~因此颱風選擇往粵東而去
雖然颱風看來不會往台灣過來
但是它的外圍雲層以及水氣仍會對天氣有些影響
高壓邊緣也讓台灣附近持續吹偏南風
南部東南部有機會出現短暫陣雨或雷雨~雲層可能從巴士海峽或海峽南部移向陸地
中部北部東北部東部則是以午後雷雨為主~並且有可能出現較大雨勢
前往山區或是溪流邊請多留意天氣上的轉變情況
海峽南部以及巴士海峽的風浪有所增強~要到海邊活動還是要特別小心
明天週六颱風應該就會進入廣東東部陸地
外圍環流配合高壓邊緣持續帶來偏南到西南風氣流
南部東南部仍有短暫陣雨或雷雨~降雨的情況有可能比今天要稍微明顯一些
其他地方則仍是午後有雷雨的天氣~同樣會有較大雷雨出現的情況
台灣海峽以及巴士海峽的風浪仍會較大
計畫到海邊或是山區度假的朋友仍要小心颱風邊緣帶來的天氣影響
成行應該是沒問題~只是對自身安全還是要小心謹慎
後天週日台灣附近漸轉西南風氣流為主~迎風的中部南部有短暫陣雨或雷雨
北部東北部東部午後則有熱對流雷雨~
局部地區還是有較大雨勢會發生~請持續留意
下週暫時來看在前期會維持西南氣流的天氣型態
要到後期隨著副高壓有所西伸北抬~天氣狀況才可望趨於穩定
逐漸走向比較典型正常的夏季型天氣
而南邊的擾動也將會持續有所動作~未來要留意的眼光也都要放在南邊為主了
以上簡單供參考囉~
--
路線明顯的往西北轉了一下~到了最近這1~2個小時又回到偏北的方向前進
目前它的中心正在逐漸靠近東沙島附近海域
外圍的環流雲層則慢慢的進入台灣海峽南部到廣東海面一帶
而且往北延伸的速度還蠻快的~顯示引導氣流仍然明顯
結構上則仍然未見改善~LLCC持續外露
雖然本身環流內受到西南風水氣供應以及高層輻散良好的幫助有對流爆發
但是LLCC移動迅速~對流雲難以整理鞏固到中心周圍
較強環境風切的負面作用也陰魂不散的跟著它
強度要有所增強的可能性已經有限
路線方面也大致確定了~引導氣流仍強~高壓勢力在今天變化不大
預估會讓南卡繼續往廣東汕頭到汕尾之間的沿海靠近~甚至更偏到汕尾以西的地方
昨晚往西北偏了一點~使得預期登陸的地方跟著往西修正
颱風本身對台灣的影響也會再小一些
這一回的南卡颱風很多人都拿來跟去年的風神比較
但是個人覺得兩者的情況有異也有同
去年的風神是高壓中心位置在台灣以東~勢力強大~華中東移的槽線無法撼動高壓
最後導致預期颱風順轉的路線失敗~實際路線整個往西偏
今年的南卡則是高壓從一開始就偏東~勢力不強~高壓邊緣在菲律賓到台灣附近
大陸東岸有槽區停留~地面鋒面的位置偏南
整體的形式來看預測颱風會順轉是相當正常的事情
不過已經6月底的環境~高壓的強度仍是比預期的稍強
邊緣出現略為偏西的情況~槽線則出現淺化北縮的趨勢
最後導致南卡的實際路線也比預期的往西修正
跟風神相同的是高壓的強度最後都強於預測~只是一個是打死不退~另一個是奮力突破
看起來以後這種季節性的背景因素還是要多加考慮才行
當初也是因為無法判斷出高壓究竟會比預期的強還是弱~
所以在關鍵區的路線一直都只能告訴大家有兩種可能
最後高壓仍在季節轉換的背景下比預期強~
昨晚這種跡象已經相當明顯~因此颱風選擇往粵東而去
雖然颱風看來不會往台灣過來
但是它的外圍雲層以及水氣仍會對天氣有些影響
高壓邊緣也讓台灣附近持續吹偏南風
南部東南部有機會出現短暫陣雨或雷雨~雲層可能從巴士海峽或海峽南部移向陸地
中部北部東北部東部則是以午後雷雨為主~並且有可能出現較大雨勢
前往山區或是溪流邊請多留意天氣上的轉變情況
海峽南部以及巴士海峽的風浪有所增強~要到海邊活動還是要特別小心
明天週六颱風應該就會進入廣東東部陸地
外圍環流配合高壓邊緣持續帶來偏南到西南風氣流
南部東南部仍有短暫陣雨或雷雨~降雨的情況有可能比今天要稍微明顯一些
其他地方則仍是午後有雷雨的天氣~同樣會有較大雷雨出現的情況
台灣海峽以及巴士海峽的風浪仍會較大
計畫到海邊或是山區度假的朋友仍要小心颱風邊緣帶來的天氣影響
成行應該是沒問題~只是對自身安全還是要小心謹慎
後天週日台灣附近漸轉西南風氣流為主~迎風的中部南部有短暫陣雨或雷雨
北部東北部東部午後則有熱對流雷雨~
局部地區還是有較大雨勢會發生~請持續留意
下週暫時來看在前期會維持西南氣流的天氣型態
要到後期隨著副高壓有所西伸北抬~天氣狀況才可望趨於穩定
逐漸走向比較典型正常的夏季型天氣
而南邊的擾動也將會持續有所動作~未來要留意的眼光也都要放在南邊為主了
以上簡單供參考囉~
--
Tags:
颱風
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