鋒面徘徊,周末注意雨勢~2015/05/22 - 颱風討論

By Hardy
at 2015-05-22T20:32
at 2015-05-22T20:32
Table of Contents
先來看看過去這兩三天的預測跟實際狀況~
520鋒面如預期抵達台灣,白天期間由北往南緩慢移動,在台灣海峽有中小尺度對流爆發
配合鋒前的西南風不斷引入暖濕空氣,跟台灣地形有交角
對中北部平地有明顯的降雨,特別是中彰沿海雨量高達170~180毫米/日,
降雨集中在平地的因素是因為風不夠強的關係,對流降雨對平地影響較大,
入夜後鋒面迅速南下,白天長出來的中小尺度對流也正好進入消散期,整體降雨趨緩,
521鋒面位於台灣南端附近,廣東海面到台灣海峽南部持續有新的中小尺度對流爆發,
不過這一天台灣海峽到廣東海面的中低層風向比較偏南風,
也就是順著台灣地形,並沒有跟地形有明顯交角
對流多半在海上活動,真正的大雨區也都在海上,
飄向陸地的屬於對流發展後,高度較高部分的層狀雲,降雨雖然有,雨勢並不大,
今天522隨著華北有新一個短波槽東移,
滯留鋒面上在台灣西南方有低壓波動誘生的趨勢,
不過短波槽稍微淺了一點,波動雖然如預期被誘生,不過發展的幅度沒有很大,
低壓波動從白天開始逐漸向東北移動,目前正在通過台灣上空,
預估明天白天會來到台灣東北方海面,並且較為明顯的加深,
隨著低壓波動的通過,西南風有被帶動加強的趨勢,
今天南部的降雨明顯的增多了,特別是在屏東山區,累積雨量有部分地區超過100毫米,
這些變化到目前為止其實都在預期中,先前的文章裡也都有預估到,
至於接下來的變化可能是真正要觀察的重點,
預估隨著低壓波動通過台灣,明天周六(23日)會來到台灣東北方海面並且加深,
鋒面系統向西南拉出,繼續停留在台灣上空,
配合增強的西南風水氣,中小尺度對流發展預估會較為活躍,
各地都有機會出現陣雨或雷雨的天氣,西半部的雨勢比東半部要來得大,
有可能達到大雨,局部地區豪雨等級的雨量,並且有短時間瞬間強降雨發生的可能性。
後天周日(24日)鋒面仍在台灣上空,西南風還是比較強,提供較為充沛的水氣,
台灣附近中小尺度對流發展還是會比較活躍,西半部仍要注意大雨,
局部地區可能達到豪雨,東半部亦有可能出現大雨。
整體來看周末假期這兩天天氣狀況不佳,安排活動的朋友務必要特別注意。
下周一(25日)鋒面位置有開始往南移動的趨勢,
隨著鋒面往南,中部以北地區的降雨有機會從下半天起逐漸趨緩,
南部地區受影響還是比較大,持續是有陣雨或雷雨的天氣,
並且有大雨或局部豪雨發生的可能。
下周二(26日)鋒面可望更往南移動到巴士海峽,
除了南部仍有可能出現短暫陣雨或雷雨外,其他地方的天氣較為好轉,
但是午後仍可能出現較為旺盛的午後熱對流,戶外活動還是要留意天氣上的變化情況。
這幾天大家對於這波鋒面討論了非常多,
媒體上非常多聳動的用詞,老實說大家看久了也都該麻木了,
這幾年的寫文下來的心得,氣象預報還是用中性的詞句,正確的表達就好,
預報終究是預報,出錯或是有落差是難免的,
但是該提醒的就要提醒,當有可能發生風險狀況的時候,
即使很難報還是要把預測的結果告知大家,
相信每個專業的預報員都不會刻意去欺騙或是誇大,
至於接收到預報的人感受如何,也只能讓大家自己去決定了,
簡單供參考囉~
--
520鋒面如預期抵達台灣,白天期間由北往南緩慢移動,在台灣海峽有中小尺度對流爆發
配合鋒前的西南風不斷引入暖濕空氣,跟台灣地形有交角
對中北部平地有明顯的降雨,特別是中彰沿海雨量高達170~180毫米/日,
降雨集中在平地的因素是因為風不夠強的關係,對流降雨對平地影響較大,
入夜後鋒面迅速南下,白天長出來的中小尺度對流也正好進入消散期,整體降雨趨緩,
521鋒面位於台灣南端附近,廣東海面到台灣海峽南部持續有新的中小尺度對流爆發,
不過這一天台灣海峽到廣東海面的中低層風向比較偏南風,
也就是順著台灣地形,並沒有跟地形有明顯交角
對流多半在海上活動,真正的大雨區也都在海上,
飄向陸地的屬於對流發展後,高度較高部分的層狀雲,降雨雖然有,雨勢並不大,
今天522隨著華北有新一個短波槽東移,
滯留鋒面上在台灣西南方有低壓波動誘生的趨勢,
不過短波槽稍微淺了一點,波動雖然如預期被誘生,不過發展的幅度沒有很大,
低壓波動從白天開始逐漸向東北移動,目前正在通過台灣上空,
預估明天白天會來到台灣東北方海面,並且較為明顯的加深,
隨著低壓波動的通過,西南風有被帶動加強的趨勢,
今天南部的降雨明顯的增多了,特別是在屏東山區,累積雨量有部分地區超過100毫米,
這些變化到目前為止其實都在預期中,先前的文章裡也都有預估到,
至於接下來的變化可能是真正要觀察的重點,
預估隨著低壓波動通過台灣,明天周六(23日)會來到台灣東北方海面並且加深,
鋒面系統向西南拉出,繼續停留在台灣上空,
配合增強的西南風水氣,中小尺度對流發展預估會較為活躍,
各地都有機會出現陣雨或雷雨的天氣,西半部的雨勢比東半部要來得大,
有可能達到大雨,局部地區豪雨等級的雨量,並且有短時間瞬間強降雨發生的可能性。
後天周日(24日)鋒面仍在台灣上空,西南風還是比較強,提供較為充沛的水氣,
台灣附近中小尺度對流發展還是會比較活躍,西半部仍要注意大雨,
局部地區可能達到豪雨,東半部亦有可能出現大雨。
整體來看周末假期這兩天天氣狀況不佳,安排活動的朋友務必要特別注意。
下周一(25日)鋒面位置有開始往南移動的趨勢,
隨著鋒面往南,中部以北地區的降雨有機會從下半天起逐漸趨緩,
南部地區受影響還是比較大,持續是有陣雨或雷雨的天氣,
並且有大雨或局部豪雨發生的可能。
下周二(26日)鋒面可望更往南移動到巴士海峽,
除了南部仍有可能出現短暫陣雨或雷雨外,其他地方的天氣較為好轉,
但是午後仍可能出現較為旺盛的午後熱對流,戶外活動還是要留意天氣上的變化情況。
這幾天大家對於這波鋒面討論了非常多,
媒體上非常多聳動的用詞,老實說大家看久了也都該麻木了,
這幾年的寫文下來的心得,氣象預報還是用中性的詞句,正確的表達就好,
預報終究是預報,出錯或是有落差是難免的,
但是該提醒的就要提醒,當有可能發生風險狀況的時候,
即使很難報還是要把預測的結果告知大家,
相信每個專業的預報員都不會刻意去欺騙或是誇大,
至於接收到預報的人感受如何,也只能讓大家自己去決定了,
簡單供參考囉~
--
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