天氣概況~2013/08/16 - 颱風討論

By Suhail Hany
at 2013-08-16T09:16
at 2013-08-16T09:16
Table of Contents
雖然說都是位於大低壓帶中~大氣不穩定~不過每天的天氣狀況仍是會有些不同~
前天尤特帶來的水氣甚多~迎風降雨以及熱力對流降雨相當明顯~
到昨天隨著低壓帶更往東延伸~帶中的低壓環流漸漸成形~
原本從南海東北部直接上來的水氣輸送帶逐漸被往東拉出去~
較為明顯的水氣輸送變成從巴士海峽往東北東伸展到琉球以南~
直接吹向台灣的水氣少了一些~迎風降雨還有午後對流的降雨量都跟著減少~
目前在台灣仍然在大低壓帶中~但是隨著台灣以東還有那霸東南兩個低壓的發展拉扯~
較明顯的水氣輸送如同先前文章所提到的~被吸引而偏離台灣~
南台灣~包括台南以南到恆春半島~還有台東南側可能受到水氣輸送帶邊緣影響~
仍會有短暫陣雨或雷雨出現的機會~不過降雨比較陣性~有回波進來才有降雨~
水氣少了些~不過大氣仍是不穩定的狀態~
因此其他地方還是要注意午後熱對流的發展以及擴散的狀況~
預期今天到明天(16~17號)中午過後沿著中央山脈仍然容易有午後熱對流出現~
並且還是會有局部較旺盛的對流帶來大雨的機會~
平地的部分就要看對流擴散的方向而定~
隨著東部海域低壓環流的醞釀~午後對流發展後可能會比較偏向西南方擴散~
提醒大家下午出門還是要特別小心注意一下~
記得攜帶雨具~並且隨時注意雷達上的變化情況~
前往山區或溪流邊活動更要多加留意午後的天氣轉變~
沿海的風雖然不大~但是浪可能還是不小~海邊活動也要小心~
台灣以東目前有兩個低壓系統~
一個就在石垣島南方(98W)~另一個在琉球那霸東南方遠海(99W)~
98W環流較小~但是較為完整~99W環流大~不過結構鬆散~
兩者屬於同一個大低壓環流內~兩個中心勢必要做出整合~
目前的看法是98W會緩慢向東移動~大致保持較為完整的環流~
99W寬鬆的大環流則是往西延伸~逐漸把98W包圍~
然後兩者漸合為一個大環流系統~兩中心可能互旋~
98W繼續緩慢東進~99W則以較快的速度順著逆時針軌跡運動~
先西北西~轉西~再轉西南西~繞過琉球本島附近後逐漸趨向台灣近海~
但是隨著98W逐漸發展加強~99W可能是越來越弱的情況~靠近台灣時應該已經不明顯~
殘餘的環流雲層則預估從周日(18號)起對北臺灣有些影響性~
可能造成非午後熱對流的降雨情況增多~降雨雲層從海上飄進北臺灣~
但周日主要的天氣變化應該還是落在午後山區發展的熱對流身上~
對流發展的旺盛與否對於降雨的變化影響較大~
下周一(19號)起則是要開始注意98W漸趨發展後的移動狀況~
以目前的高壓形態預測來看~98W發展後向西偏移的機會不低~
有可能直接就會往台灣東部靠近過來~對天氣的影響值得密切觀察~
由於北邊的高壓應該還是蠻強勢的維持東西向帶狀形態~
較高緯度的短波槽對於這條橫亙在日本~韓國到華北的帶狀副高壓影響有限~
因此現在傾向認為98W西進趨向台灣的機會大~
但到時98W的強度是否會達到颱風等級還有待觀察~
如果真的靠近~可能是在下周二到周四(20~22號)間會經過台灣附近~
以現在高壓的強度預估~只要移動的方向明確~移速應該不會太慢~
等到這波系統西移離開後~再來就是季風槽整體向西收縮撤退的過程~
順利的話~副高壓將隨之往南調整~並且再度西伸向台灣到華南一帶~
8月下旬後半應該有機會回到正常高壓籠罩的夏季天氣~
不過這中間仍有變化的可能性~目前還有點言之過早~只能說趨勢上應該會是如此~
總之~未來這兩三天台灣這邊要注意不穩定大氣引發的午後旺盛熱對流降雨~
對追風有興趣的朋友則要密切觀察台灣以東兩個低壓互動整合的變化~
下周看起來應該是有機會有低壓或是颱風自東向西經過台灣附近的情況~
以上先簡單供參考囉~
--
前天尤特帶來的水氣甚多~迎風降雨以及熱力對流降雨相當明顯~
到昨天隨著低壓帶更往東延伸~帶中的低壓環流漸漸成形~
原本從南海東北部直接上來的水氣輸送帶逐漸被往東拉出去~
較為明顯的水氣輸送變成從巴士海峽往東北東伸展到琉球以南~
直接吹向台灣的水氣少了一些~迎風降雨還有午後對流的降雨量都跟著減少~
目前在台灣仍然在大低壓帶中~但是隨著台灣以東還有那霸東南兩個低壓的發展拉扯~
較明顯的水氣輸送如同先前文章所提到的~被吸引而偏離台灣~
南台灣~包括台南以南到恆春半島~還有台東南側可能受到水氣輸送帶邊緣影響~
仍會有短暫陣雨或雷雨出現的機會~不過降雨比較陣性~有回波進來才有降雨~
水氣少了些~不過大氣仍是不穩定的狀態~
因此其他地方還是要注意午後熱對流的發展以及擴散的狀況~
預期今天到明天(16~17號)中午過後沿著中央山脈仍然容易有午後熱對流出現~
並且還是會有局部較旺盛的對流帶來大雨的機會~
平地的部分就要看對流擴散的方向而定~
隨著東部海域低壓環流的醞釀~午後對流發展後可能會比較偏向西南方擴散~
提醒大家下午出門還是要特別小心注意一下~
記得攜帶雨具~並且隨時注意雷達上的變化情況~
前往山區或溪流邊活動更要多加留意午後的天氣轉變~
沿海的風雖然不大~但是浪可能還是不小~海邊活動也要小心~
台灣以東目前有兩個低壓系統~
一個就在石垣島南方(98W)~另一個在琉球那霸東南方遠海(99W)~
98W環流較小~但是較為完整~99W環流大~不過結構鬆散~
兩者屬於同一個大低壓環流內~兩個中心勢必要做出整合~
目前的看法是98W會緩慢向東移動~大致保持較為完整的環流~
99W寬鬆的大環流則是往西延伸~逐漸把98W包圍~
然後兩者漸合為一個大環流系統~兩中心可能互旋~
98W繼續緩慢東進~99W則以較快的速度順著逆時針軌跡運動~
先西北西~轉西~再轉西南西~繞過琉球本島附近後逐漸趨向台灣近海~
但是隨著98W逐漸發展加強~99W可能是越來越弱的情況~靠近台灣時應該已經不明顯~
殘餘的環流雲層則預估從周日(18號)起對北臺灣有些影響性~
可能造成非午後熱對流的降雨情況增多~降雨雲層從海上飄進北臺灣~
但周日主要的天氣變化應該還是落在午後山區發展的熱對流身上~
對流發展的旺盛與否對於降雨的變化影響較大~
下周一(19號)起則是要開始注意98W漸趨發展後的移動狀況~
以目前的高壓形態預測來看~98W發展後向西偏移的機會不低~
有可能直接就會往台灣東部靠近過來~對天氣的影響值得密切觀察~
由於北邊的高壓應該還是蠻強勢的維持東西向帶狀形態~
較高緯度的短波槽對於這條橫亙在日本~韓國到華北的帶狀副高壓影響有限~
因此現在傾向認為98W西進趨向台灣的機會大~
但到時98W的強度是否會達到颱風等級還有待觀察~
如果真的靠近~可能是在下周二到周四(20~22號)間會經過台灣附近~
以現在高壓的強度預估~只要移動的方向明確~移速應該不會太慢~
等到這波系統西移離開後~再來就是季風槽整體向西收縮撤退的過程~
順利的話~副高壓將隨之往南調整~並且再度西伸向台灣到華南一帶~
8月下旬後半應該有機會回到正常高壓籠罩的夏季天氣~
不過這中間仍有變化的可能性~目前還有點言之過早~只能說趨勢上應該會是如此~
總之~未來這兩三天台灣這邊要注意不穩定大氣引發的午後旺盛熱對流降雨~
對追風有興趣的朋友則要密切觀察台灣以東兩個低壓互動整合的變化~
下周看起來應該是有機會有低壓或是颱風自東向西經過台灣附近的情況~
以上先簡單供參考囉~
--
Tags:
颱風
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