天氣概況~2012/08/19~天秤颱風將成形~ - 颱風討論
By Valerie
at 2012-08-19T08:02
at 2012-08-19T08:02
Table of Contents
這禮拜回宜蘭辦事情~沒想到才暫離一天~天氣形勢就變化很快~
周五的時候還是季風槽低壓帶籠罩~對流活躍而且發展時間很長~
後來因為啟德颱風快速西進~跟台灣以東的96W越拉越遠~
兩者中間被太平洋高壓趁機伸入~
使得季風槽整個被往南推擠~96W也跟著往南調整位置~
台灣到週六時受低壓帶的影響變小了~
雖然午後仍有對流發展的情況~不過已經沒有週五時那麼活躍~
96W往南移動反而爭取到了醞釀發展的時間與空間~
很快的憑藉著小環流的優勢而建立完整的低層系統~
目前的多頻微波掃描以及VIS動畫都已經看出良好的組織跟旋轉現象~
預估今天可能稍晚或是下午就會升格為第1214號颱風天秤
未來天秤誕生後對台灣具有相當程度的威脅性~
短時間內可能先在原地附近打轉~繞圈圈或是滯留~
大概到明天以後有逐漸北上的機會~
主要是東邊馬里亞納群島一帶的97W跟98W可能合併成一個較大的低壓擾動~
然後太平洋高壓又會伸入天秤與這個低壓擾動之間~
給予天秤一個南北向的引導~使它往台灣東部海域靠近~
預期到下周二~周三(21~22號)就會逼近台灣東部到東北部近海~
接著因為跟台灣地形的互動以及高壓的引導氣流影響~
不排除天秤有被拉向北台灣陸地的機會~
整體情況可能有點類似月初的蘇拉颱風~
按照現在的預報的話~
今天到明天周一(19~20號)這個準天秤颱風對台灣還沒有影響~
反而因為它的發展加強~吸走了水氣~帶來了下沉的作用~
預估各地上午天氣還不錯~午後在西半部山區有熱對流發展的可能~
然後順著東風往西半部平地擴散~
雖然降雨的情況已經不如前兩天劇烈~但還是要提醒大家注意局部瞬間的大雨~
午後出門的話要多注意雷達上的發展變化~
周二(21號)颱風慢慢靠近東南部到東部海域~
外圍環流有機會逐漸造成東北部東部出現地形降雨的情況~
中部南部午後則仍有局部熱對流發展降雨的可能~
周三(22號)颱風更為靠近~北部東北部東部有迎風面降雨~雨勢加大~
海邊以及海面上的風浪從周二開始加強~周三會更惡劣~
周四(23號)天秤颱風有可能直接影響台灣或是從近海掠過~
也就是可能最靠近北台灣~提醒中北部~東北部以及東部花蓮地區的朋友要嚴加戒備~
由於颱風靠近台灣時可能跟地形交互作用~
因此會不會出現風場轉移的現象~又把強風軸往中部以南地區轉移帶來暴雨目前無法確定
但除非颱風沒有被地形吸引進來~
不然天秤對台灣的影響威脅性相當大~
未來這兩三天都必須要密切留意~
一但真的登陸~又會是一連串複雜的地形跟颱風環流的糾纏~
周五(24號)天秤就會逐漸遠離~
暫時來看不會引進西南氣流~因為主要的季風水氣會被東邊另一個大範圍的擾動給拉走~
不過風向會有1~2天為偏南風或西南風~水氣仍較多~
迎風面地區還是會有降雨的機會~其他地方也會有午後熱對流降雨的情況~
至於周末假期(25~26號)就必須觀察風向以及水氣的變化了~
這跟東邊的下一個擾動有關~這個擾動很有機會成為第1215號颱風布拉萬~
但是這隻還言之過早~97W跟98W的互動還有得玩~
還是先把焦點放在可能威脅台灣的準天秤颱風(96W)再說~
預報仍有再變動的可能~請大家密切留意未來這24~72小時的變化趨勢~
以上簡單供參考囉~
--
周五的時候還是季風槽低壓帶籠罩~對流活躍而且發展時間很長~
後來因為啟德颱風快速西進~跟台灣以東的96W越拉越遠~
兩者中間被太平洋高壓趁機伸入~
使得季風槽整個被往南推擠~96W也跟著往南調整位置~
台灣到週六時受低壓帶的影響變小了~
雖然午後仍有對流發展的情況~不過已經沒有週五時那麼活躍~
96W往南移動反而爭取到了醞釀發展的時間與空間~
很快的憑藉著小環流的優勢而建立完整的低層系統~
目前的多頻微波掃描以及VIS動畫都已經看出良好的組織跟旋轉現象~
預估今天可能稍晚或是下午就會升格為第1214號颱風天秤
未來天秤誕生後對台灣具有相當程度的威脅性~
短時間內可能先在原地附近打轉~繞圈圈或是滯留~
大概到明天以後有逐漸北上的機會~
主要是東邊馬里亞納群島一帶的97W跟98W可能合併成一個較大的低壓擾動~
然後太平洋高壓又會伸入天秤與這個低壓擾動之間~
給予天秤一個南北向的引導~使它往台灣東部海域靠近~
預期到下周二~周三(21~22號)就會逼近台灣東部到東北部近海~
接著因為跟台灣地形的互動以及高壓的引導氣流影響~
不排除天秤有被拉向北台灣陸地的機會~
整體情況可能有點類似月初的蘇拉颱風~
按照現在的預報的話~
今天到明天周一(19~20號)這個準天秤颱風對台灣還沒有影響~
反而因為它的發展加強~吸走了水氣~帶來了下沉的作用~
預估各地上午天氣還不錯~午後在西半部山區有熱對流發展的可能~
然後順著東風往西半部平地擴散~
雖然降雨的情況已經不如前兩天劇烈~但還是要提醒大家注意局部瞬間的大雨~
午後出門的話要多注意雷達上的發展變化~
周二(21號)颱風慢慢靠近東南部到東部海域~
外圍環流有機會逐漸造成東北部東部出現地形降雨的情況~
中部南部午後則仍有局部熱對流發展降雨的可能~
周三(22號)颱風更為靠近~北部東北部東部有迎風面降雨~雨勢加大~
海邊以及海面上的風浪從周二開始加強~周三會更惡劣~
周四(23號)天秤颱風有可能直接影響台灣或是從近海掠過~
也就是可能最靠近北台灣~提醒中北部~東北部以及東部花蓮地區的朋友要嚴加戒備~
由於颱風靠近台灣時可能跟地形交互作用~
因此會不會出現風場轉移的現象~又把強風軸往中部以南地區轉移帶來暴雨目前無法確定
但除非颱風沒有被地形吸引進來~
不然天秤對台灣的影響威脅性相當大~
未來這兩三天都必須要密切留意~
一但真的登陸~又會是一連串複雜的地形跟颱風環流的糾纏~
周五(24號)天秤就會逐漸遠離~
暫時來看不會引進西南氣流~因為主要的季風水氣會被東邊另一個大範圍的擾動給拉走~
不過風向會有1~2天為偏南風或西南風~水氣仍較多~
迎風面地區還是會有降雨的機會~其他地方也會有午後熱對流降雨的情況~
至於周末假期(25~26號)就必須觀察風向以及水氣的變化了~
這跟東邊的下一個擾動有關~這個擾動很有機會成為第1215號颱風布拉萬~
但是這隻還言之過早~97W跟98W的互動還有得玩~
還是先把焦點放在可能威脅台灣的準天秤颱風(96W)再說~
預報仍有再變動的可能~請大家密切留意未來這24~72小時的變化趨勢~
以上簡單供參考囉~
--
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颱風
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