留意西南強風軸帶來的降雨~2015/07/18 - 颱風討論
By Sarah
at 2015-07-18T16:40
at 2015-07-18T16:40
Table of Contents
南卡颱風登陸日本後明顯減弱,留下大片的低壓帶在台灣附近及以南的海面上,
低壓帶南側存在西南季風的強風軸線,伴隨有大片的雲雨帶發展,
過去幾天這些雲雨帶位置偏南,並沒有直接影響台灣,
台灣位於低壓帶北側,大氣雖然不穩定,卻是以午後熱對流降雨為主。
隨著時間過去,低壓帶中已經發展出兩個較明顯的低壓中心,
一個位於琉球附近,是原本在巴士海峽發生,之後逐漸向東北移動並且加強的系統,
另一個則位於廣東海面,兩個低壓串聯成一個相當大範圍低壓環流。
南卡颱風北上消失後,太平洋高壓趁勢往西推擠,
整個大低壓環流逐漸往北移動,南側伴隨的西南強風軸也跟著往北移,
今天已經到了巴士海峽,預估隨著兩個低壓中心繼續往北發展,
西南強風軸的位置也將一路向北,也就是往台灣方向接近。
預估琉球海域的低氣壓距離台灣較遠,繼續北上後主要影響九州、韓國的天氣,
廣東海面的低氣壓則是我們要注意的焦點,預估它會逐漸靠近廣東、福建沿海,
之後繼續往華東一帶發展移動,本身加強的幅度可能有限,
但卻會帶動西南強風軸北上到台灣附近,
明天(19日)受到西南風逐漸加強的影響,
中部、南部以及台東要留意降雨逐漸增多增大的狀況,天氣將轉為陣雨的型態,
風速夠強的話,山區的迎風降雨尤其要留意,
北部、宜蘭到花蓮一帶則還是以午後雷雨為主,可能出現局部性的大雷雨,
整體天氣不穩定,跟這幾天有較大的變化,提醒大家要注意一下。
目前來看,西南風強風軸北上後,可能影響台灣3~4天左右,
預估要到下周四(23日)後,強風軸位置繼續北上,台灣受影響的狀況才會趨於緩和。
在這段期間內,迎風的中部南部以及台東等地要特別留意降雨的狀況,
並且注意較大雨勢可能造成的影響,
北部及宜蘭花蓮等地也會有雨,
特別是中午過後熱力作用加入造成的午後大雷雨,也需要小心留意。
往遠一點的地方看,太平洋高壓南側目前有哈洛拉颱風以及另一個小低壓系統存在,
這兩個系統將逐漸西進,未來的變化也值得注意。
以上簡單供參考囉~
http://i.imgur.com/BSiYirp.jpg
--
低壓帶南側存在西南季風的強風軸線,伴隨有大片的雲雨帶發展,
過去幾天這些雲雨帶位置偏南,並沒有直接影響台灣,
台灣位於低壓帶北側,大氣雖然不穩定,卻是以午後熱對流降雨為主。
隨著時間過去,低壓帶中已經發展出兩個較明顯的低壓中心,
一個位於琉球附近,是原本在巴士海峽發生,之後逐漸向東北移動並且加強的系統,
另一個則位於廣東海面,兩個低壓串聯成一個相當大範圍低壓環流。
南卡颱風北上消失後,太平洋高壓趁勢往西推擠,
整個大低壓環流逐漸往北移動,南側伴隨的西南強風軸也跟著往北移,
今天已經到了巴士海峽,預估隨著兩個低壓中心繼續往北發展,
西南強風軸的位置也將一路向北,也就是往台灣方向接近。
預估琉球海域的低氣壓距離台灣較遠,繼續北上後主要影響九州、韓國的天氣,
廣東海面的低氣壓則是我們要注意的焦點,預估它會逐漸靠近廣東、福建沿海,
之後繼續往華東一帶發展移動,本身加強的幅度可能有限,
但卻會帶動西南強風軸北上到台灣附近,
明天(19日)受到西南風逐漸加強的影響,
中部、南部以及台東要留意降雨逐漸增多增大的狀況,天氣將轉為陣雨的型態,
風速夠強的話,山區的迎風降雨尤其要留意,
北部、宜蘭到花蓮一帶則還是以午後雷雨為主,可能出現局部性的大雷雨,
整體天氣不穩定,跟這幾天有較大的變化,提醒大家要注意一下。
目前來看,西南風強風軸北上後,可能影響台灣3~4天左右,
預估要到下周四(23日)後,強風軸位置繼續北上,台灣受影響的狀況才會趨於緩和。
在這段期間內,迎風的中部南部以及台東等地要特別留意降雨的狀況,
並且注意較大雨勢可能造成的影響,
北部及宜蘭花蓮等地也會有雨,
特別是中午過後熱力作用加入造成的午後大雷雨,也需要小心留意。
往遠一點的地方看,太平洋高壓南側目前有哈洛拉颱風以及另一個小低壓系統存在,
這兩個系統將逐漸西進,未來的變化也值得注意。
以上簡單供參考囉~
http://i.imgur.com/BSiYirp.jpg

--
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