西南風持續,天氣仍不穩定~2015/08/13
昨天起隨著太平洋高壓西伸,
高壓邊緣的偏南風到西南風逐漸把南海的水氣往台灣附近推送,
昨天開始迎風的中南部沿海地區已經有降雨的狀況,
中午過後山區發展的熱對流雷雨也變多,今天這樣的現象又更明顯了一些,
尤其午後的熱對流發展十分旺盛,
許多地方一下子累積雨量就有數十毫米之多,降雨的強度頗強。
預估高壓邊緣未來數天仍持續停留在台灣東南方,台灣上空的西南風仍較強,
帶來較多水氣,中部南部一整天有短暫陣雨或雷雨,
夜晚到清晨這段期間因為海陸風的加入,降雨特別容易發生,
其他地方則要留意午後熱對流發展降雨,可能有局部較大雨勢發生的機會,
整體天氣不穩定,周末期間打算安排假期活動的朋友可能要注意一下。
目前在關島東南方海域有兩個低壓擾動系統,在大氣條件支持的狀況下,
兩個擾動看來都有發展加強的趨勢,結構逐漸鞏固,螺旋雲帶也漸趨明顯,
預估未來兩天應該會繼續發展為熱帶性低氣壓,甚至是颱風。
短時間內兩個系統大致都會往西移動,
下周之後太平洋高壓的強弱狀況會決定颱風是否靠近台灣,
由於後期看起來北邊大陸上有短波槽活動,因此高壓強弱的變動性還蠻大的,
加上兩個低壓擾動之間的互相牽制作用,
整個大氣型態比起蘇迪勒的時候來講要複雜許多,仍需要繼續觀察後續的變化。
以上簡單供參考~
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