天氣概況~2012/08/05 - 颱風討論
By David
at 2012-08-05T08:36
at 2012-08-05T08:36
Table of Contents
這兩天比較多事情~趁出門前聊聊天氣~
昨天台灣如預期位於蘇拉減弱後的低壓跟海葵颱風之間的氣流輻合區~
中南部有南風帶來水氣~北台灣則逐漸受到海葵帶來的偏北氣流影響~
天氣並不穩定~南部由南風帶來的水氣還蠻多的~造成南台灣普遍而較大的降雨~
北台灣則是在北風進來後~在午後激發出熱對流並且往宜蘭方向擴散~也帶來頗多降雨~
對流活動此起彼落~今天天亮以前在台中的山區又有一塊對流發展出來~
顯示大氣的穩定度並不高~因此今天下雨的可能性還是比較大的~
今天隨著海葵颱風來到琉球附近~風向會逐漸轉為全面的北風到西北風~
目前颱風外圍的中高雲系已經慢慢來到台灣上空~風向也正在由北往南陸續轉變~
迎風面上的中部以北地區(山脈西側)可能逐漸會有局部短暫陣雨出現~
其它地方要注意午後熱對流發展擴散的現象~
預估還是會有比較旺盛的對流出現~因此午後外出的話要多關心雷達上的變化~
明後兩天週一週二(6~7號)受海葵颱風外圍環流影響的情況將更趨明顯~
颱風在台灣北邊西進~朝向浙江中北部沿海逼近~
台灣的風向由西北轉西再轉西南風~
明天大致還是西北轉偏西風的過程~後天的風向就會比較明顯的轉為西南風為主~
預估明天週一在中部以北地區持續有迎風面短暫陣雨出現的機會~
午後在山區仍有局部旺盛熱對流發展的現象~並且順風向往東擴散~
北部東北部海域的風浪增強~要到海邊活動恐怕是比較不適合的~
台灣海峽中北部沿海也會有風浪轉強的現象~
明晚以後風向繼續轉變~南部地區要開始注意西南風帶來的水氣影響~
不過比較主要受西南風影響的時間應該要從後天週二開始~
迎風的中南部地區出現陣雨或短暫陣雨的機會明顯提高~甚至有雷雨會出現~
其它地方午後也有較大雷雨發生的可能性~
到了週三(8號)海葵颱風進入大陸~強度逐漸減弱~
不過接下來大概會有好幾天台灣都還是以西南風為主的天氣型態~
中部以南地區為迎風面~持續有短暫陣雨或雷雨~
其它地方午後也要注意中到大雷雨出現的情況~
雖然西南風的風速不會很強~看起來不到西南"氣流"的程度~
但是帶來的水氣仍會比較多~因此造成未來這一段時間內天氣都不是很穩定~
即使海葵颱風進入大陸明顯減弱後~西南風仍會持續影響數天的時間~
有一直持續影響到下週末(11~12號)的可能~
天氣型態的轉變要等到太平洋高壓重新西伸加強~
時間點預估至少要等到一週以後才有機會了~
海葵颱風過去一段時間大致如預期的順著高壓邊緣往琉球靠近~
目前已經逼近那霸東北方近海~
結構逐漸調整~並且逐漸甩開南側大團的季風對流雲系~
成功轉變成一個中等大小的颱風環流~
核心的部分逐漸內縮~從JMA的雷達觀察可以看到核心環流圈也慢慢在建立中~
顯示強度正在加強~週邊的大氣環境也還算蠻適合的~
預估在CISK機制發揮下~強度會繼續成長~
颱風北側的太平洋高壓已經伸展到華東地區~
未來兩三天內大致都還是這樣的情況~因此預估將穩定引導海葵撲向浙江中北部沿海~
因為起跑點的緯度已經較偏高~所以台灣避開了海葵的直接侵襲~
但是距離不算太遠~外圍環流仍有影響~情況大致就如上述所提~
海葵襲擊浙江後~這波季風槽東側的最後一個系統TD-13W也將逐漸北上~
雖然它有機會變成1212號奇洛基颱風~但是應該是屬於遠洋自生自滅的颱風~
再來就要等太平洋高壓在季風槽南側較低緯度的海域重新北抬西伸加強的過程~
預估8月中旬會逐漸完成高壓北抬的變化~
然後新一輪的颱風活動會回歸到正常的熱帶洋面~也就是偏向菲律賓東方到關島一帶~
預期要再有颱風接近或影響台灣~時間點可能要等到8月的下旬去了~
不過大氣環流的轉變會不會更加快還需要多注意~
以上先簡單供參考囉~
--
昨天台灣如預期位於蘇拉減弱後的低壓跟海葵颱風之間的氣流輻合區~
中南部有南風帶來水氣~北台灣則逐漸受到海葵帶來的偏北氣流影響~
天氣並不穩定~南部由南風帶來的水氣還蠻多的~造成南台灣普遍而較大的降雨~
北台灣則是在北風進來後~在午後激發出熱對流並且往宜蘭方向擴散~也帶來頗多降雨~
對流活動此起彼落~今天天亮以前在台中的山區又有一塊對流發展出來~
顯示大氣的穩定度並不高~因此今天下雨的可能性還是比較大的~
今天隨著海葵颱風來到琉球附近~風向會逐漸轉為全面的北風到西北風~
目前颱風外圍的中高雲系已經慢慢來到台灣上空~風向也正在由北往南陸續轉變~
迎風面上的中部以北地區(山脈西側)可能逐漸會有局部短暫陣雨出現~
其它地方要注意午後熱對流發展擴散的現象~
預估還是會有比較旺盛的對流出現~因此午後外出的話要多關心雷達上的變化~
明後兩天週一週二(6~7號)受海葵颱風外圍環流影響的情況將更趨明顯~
颱風在台灣北邊西進~朝向浙江中北部沿海逼近~
台灣的風向由西北轉西再轉西南風~
明天大致還是西北轉偏西風的過程~後天的風向就會比較明顯的轉為西南風為主~
預估明天週一在中部以北地區持續有迎風面短暫陣雨出現的機會~
午後在山區仍有局部旺盛熱對流發展的現象~並且順風向往東擴散~
北部東北部海域的風浪增強~要到海邊活動恐怕是比較不適合的~
台灣海峽中北部沿海也會有風浪轉強的現象~
明晚以後風向繼續轉變~南部地區要開始注意西南風帶來的水氣影響~
不過比較主要受西南風影響的時間應該要從後天週二開始~
迎風的中南部地區出現陣雨或短暫陣雨的機會明顯提高~甚至有雷雨會出現~
其它地方午後也有較大雷雨發生的可能性~
到了週三(8號)海葵颱風進入大陸~強度逐漸減弱~
不過接下來大概會有好幾天台灣都還是以西南風為主的天氣型態~
中部以南地區為迎風面~持續有短暫陣雨或雷雨~
其它地方午後也要注意中到大雷雨出現的情況~
雖然西南風的風速不會很強~看起來不到西南"氣流"的程度~
但是帶來的水氣仍會比較多~因此造成未來這一段時間內天氣都不是很穩定~
即使海葵颱風進入大陸明顯減弱後~西南風仍會持續影響數天的時間~
有一直持續影響到下週末(11~12號)的可能~
天氣型態的轉變要等到太平洋高壓重新西伸加強~
時間點預估至少要等到一週以後才有機會了~
海葵颱風過去一段時間大致如預期的順著高壓邊緣往琉球靠近~
目前已經逼近那霸東北方近海~
結構逐漸調整~並且逐漸甩開南側大團的季風對流雲系~
成功轉變成一個中等大小的颱風環流~
核心的部分逐漸內縮~從JMA的雷達觀察可以看到核心環流圈也慢慢在建立中~
顯示強度正在加強~週邊的大氣環境也還算蠻適合的~
預估在CISK機制發揮下~強度會繼續成長~
颱風北側的太平洋高壓已經伸展到華東地區~
未來兩三天內大致都還是這樣的情況~因此預估將穩定引導海葵撲向浙江中北部沿海~
因為起跑點的緯度已經較偏高~所以台灣避開了海葵的直接侵襲~
但是距離不算太遠~外圍環流仍有影響~情況大致就如上述所提~
海葵襲擊浙江後~這波季風槽東側的最後一個系統TD-13W也將逐漸北上~
雖然它有機會變成1212號奇洛基颱風~但是應該是屬於遠洋自生自滅的颱風~
再來就要等太平洋高壓在季風槽南側較低緯度的海域重新北抬西伸加強的過程~
預估8月中旬會逐漸完成高壓北抬的變化~
然後新一輪的颱風活動會回歸到正常的熱帶洋面~也就是偏向菲律賓東方到關島一帶~
預期要再有颱風接近或影響台灣~時間點可能要等到8月的下旬去了~
不過大氣環流的轉變會不會更加快還需要多注意~
以上先簡單供參考囉~
--
Tags:
颱風
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