天氣概況~2013/08/13 - 颱風討論

By Olga
at 2013-08-13T09:59
at 2013-08-13T09:59
Table of Contents
目前的焦點仍然是放在尤特颱風身上~
這個颱風如預期侵襲呂宋島~昨天出海後逐漸跟另一個擾動97W產生合併~
兩者合併後~尤特的環流明顯較登陸菲律賓前要擴大許多~
移動的方向也跟預估的一樣~出現一段往西偏折且加速的過程~
現在尤特已經大致來到香港以南~
跟97W的合併過程已經結束~逐漸回歸到正常的高壓引導走向~
從現在的高壓形式來看~尤特將回到西北西或西北的走向~
持續朝粵西沿海至雷州半島一帶前近~大概明晚就會在這一帶登陸~
強度方面有開始增強的趨勢~出海後合併掉97W~擴大後的環流已經整理的差不多了~
在登陸前仍有加強的可能~對於粵西至海南島等地有嚴重的威脅性~
其次就是稍遠一點的港澳地區~還有後續颱風可能移入的廣西~
提醒今天起未來幾天內要前往這些地方的朋友都要特別注意~
對台灣來說則是比較希望尤特的外圍環流可以來降降溫~
昨天開始颱風的外圍已經逐漸影響到花蓮台東至恆春半島一帶~有降雨發生~
不過其他地方的影響還不明顯~北部地區位於偏東風過山後的下沉區~一樣是熱烘烘~
今天颱風外圍環流雲層北上的情況比昨天要更明顯一點~
雖然主要的降雨還是發生在花東至恆春半島等地~但是其他地方的雲量已經增加不少~
預估今天台灣附近仍以偏東到東南風為主~
宜蘭以南至恆春半島的東半部地區有較高的降雨機會~
東南部有局部大雨出現的可能~
西半部則大致為多雲的天氣為主~午後山區要注意是否有熱對流發展的狀況~
晚間起隨著颱風更往西移~風向會慢慢轉為東南風至偏南風~
南部地區的降雨機會將會逐漸增加~不排除也會有局部性大雨的情況出現~
各地沿海的風浪都比較大~尤其是東南部以及南部沿海~海邊的活動最好能避免~
北部地區今天白天仍可能有強陣風的現象~但是會比昨天要減弱一些~
明天周三(14號)台灣附近大致為東南到偏南風~水氣量還會再增多~
花東地區~恆春半島以及南部地區有短暫陣雨或雷雨~並且有局部較大雨勢~
中部以北到東北部地區則是多雲午後有熱對流降雨的天氣~
可能有中到大雷雨發生的機會~天氣狀態不穩定~請大家都要特別注意~
周四(15號)起雖然尤特颱風已經遠離並且登陸減弱~
但是太平洋高壓的勢力也將要北抬東退~台灣將陷入相對的季風槽低壓帶內~
預估一直到下周的天氣都不穩定~
水氣多且氣壓低~容易有對流雲層發展的狀況~
風向大致為偏南到西南風~因此中部以南還有台東至恆春半島等地要特別注意降雨~
目前的模式預測來看降雨的訊號比較明顯~連續數天都可能有較大雨勢出現的機會~
雖然吹向台灣海峽南部一帶的西南風不是特別強(未達LLJ程度)~
海上的水氣不見得會一股腦的全灌進陸地來~
但從周四開始的大約5~7天內還是要請中南部東南部的朋友多加注意~
最好能隨時觀察一下雷達上回波移動發展的最新狀況~
中部以北到東北部還有花蓮地區的天氣也不穩定~尤其是午後的熱對流發展~
可能有旺盛的熱對流發展現象~出現大雷雨的機會偏高~
這種狀況看起來也可能會持續好幾天~
其他非午後降雨的機會就要看雲層移動的實際情況了~這部分比較難以預測~
再來還要注意的就是季風槽中是否有新的擾動系統發展~
週末到下週初在台灣以東到琉球附近海域~也就是季風槽東端仍可能有擾動發展的機會~
但能否成形要看高壓的配合狀況~
如果高壓退的較遠或勢力偏弱~高壓東風不夠強的話~正渦度強度不足~擾動就旋不起來~
有可能一直維持一大片的低壓帶~當中的小渦旋都長不大的情況~
相對的如果高壓配合的話~在季風槽東端就會是最容易旋出擾動的地方~
一但有擾動發展就必須看距離台灣是遠還是近~越近當然影響就越大~
比較遠一點的話~相反的會把水氣給拉走~台灣這邊的降雨反而會減少~
未來的變數還蠻大的~特別是周六(17號)以後的狀況~
必須要觀察擾動是否成形以及距離的遠近而定~
請大家也要隨時留意最新的天氣消息囉~
以上簡單供參考~
--
這個颱風如預期侵襲呂宋島~昨天出海後逐漸跟另一個擾動97W產生合併~
兩者合併後~尤特的環流明顯較登陸菲律賓前要擴大許多~
移動的方向也跟預估的一樣~出現一段往西偏折且加速的過程~
現在尤特已經大致來到香港以南~
跟97W的合併過程已經結束~逐漸回歸到正常的高壓引導走向~
從現在的高壓形式來看~尤特將回到西北西或西北的走向~
持續朝粵西沿海至雷州半島一帶前近~大概明晚就會在這一帶登陸~
強度方面有開始增強的趨勢~出海後合併掉97W~擴大後的環流已經整理的差不多了~
在登陸前仍有加強的可能~對於粵西至海南島等地有嚴重的威脅性~
其次就是稍遠一點的港澳地區~還有後續颱風可能移入的廣西~
提醒今天起未來幾天內要前往這些地方的朋友都要特別注意~
對台灣來說則是比較希望尤特的外圍環流可以來降降溫~
昨天開始颱風的外圍已經逐漸影響到花蓮台東至恆春半島一帶~有降雨發生~
不過其他地方的影響還不明顯~北部地區位於偏東風過山後的下沉區~一樣是熱烘烘~
今天颱風外圍環流雲層北上的情況比昨天要更明顯一點~
雖然主要的降雨還是發生在花東至恆春半島等地~但是其他地方的雲量已經增加不少~
預估今天台灣附近仍以偏東到東南風為主~
宜蘭以南至恆春半島的東半部地區有較高的降雨機會~
東南部有局部大雨出現的可能~
西半部則大致為多雲的天氣為主~午後山區要注意是否有熱對流發展的狀況~
晚間起隨著颱風更往西移~風向會慢慢轉為東南風至偏南風~
南部地區的降雨機會將會逐漸增加~不排除也會有局部性大雨的情況出現~
各地沿海的風浪都比較大~尤其是東南部以及南部沿海~海邊的活動最好能避免~
北部地區今天白天仍可能有強陣風的現象~但是會比昨天要減弱一些~
明天周三(14號)台灣附近大致為東南到偏南風~水氣量還會再增多~
花東地區~恆春半島以及南部地區有短暫陣雨或雷雨~並且有局部較大雨勢~
中部以北到東北部地區則是多雲午後有熱對流降雨的天氣~
可能有中到大雷雨發生的機會~天氣狀態不穩定~請大家都要特別注意~
周四(15號)起雖然尤特颱風已經遠離並且登陸減弱~
但是太平洋高壓的勢力也將要北抬東退~台灣將陷入相對的季風槽低壓帶內~
預估一直到下周的天氣都不穩定~
水氣多且氣壓低~容易有對流雲層發展的狀況~
風向大致為偏南到西南風~因此中部以南還有台東至恆春半島等地要特別注意降雨~
目前的模式預測來看降雨的訊號比較明顯~連續數天都可能有較大雨勢出現的機會~
雖然吹向台灣海峽南部一帶的西南風不是特別強(未達LLJ程度)~
海上的水氣不見得會一股腦的全灌進陸地來~
但從周四開始的大約5~7天內還是要請中南部東南部的朋友多加注意~
最好能隨時觀察一下雷達上回波移動發展的最新狀況~
中部以北到東北部還有花蓮地區的天氣也不穩定~尤其是午後的熱對流發展~
可能有旺盛的熱對流發展現象~出現大雷雨的機會偏高~
這種狀況看起來也可能會持續好幾天~
其他非午後降雨的機會就要看雲層移動的實際情況了~這部分比較難以預測~
再來還要注意的就是季風槽中是否有新的擾動系統發展~
週末到下週初在台灣以東到琉球附近海域~也就是季風槽東端仍可能有擾動發展的機會~
但能否成形要看高壓的配合狀況~
如果高壓退的較遠或勢力偏弱~高壓東風不夠強的話~正渦度強度不足~擾動就旋不起來~
有可能一直維持一大片的低壓帶~當中的小渦旋都長不大的情況~
相對的如果高壓配合的話~在季風槽東端就會是最容易旋出擾動的地方~
一但有擾動發展就必須看距離台灣是遠還是近~越近當然影響就越大~
比較遠一點的話~相反的會把水氣給拉走~台灣這邊的降雨反而會減少~
未來的變數還蠻大的~特別是周六(17號)以後的狀況~
必須要觀察擾動是否成形以及距離的遠近而定~
請大家也要隨時留意最新的天氣消息囉~
以上簡單供參考~
--
Tags:
颱風
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