大雨灌爆中南部 今明更凶猛 - 颱風討論

By Agnes
at 2013-05-20T08:29
at 2013-05-20T08:29
Table of Contents
2013-05-20 02:04 中國時報 【李宗祐/台北報導】
今年最強梅雨鋒面從台灣北部海域往南進逼速度減緩,北台灣昨日未如預期出現豪雨
,但中南部受鋒面前緣旺盛西南風引進暴雨影響,昨日被大豪雨灌爆。氣象局預測,這波
鋒面雲系今日全面南壓,西半部今日到周三雨勢更凶猛,從南到北都要嚴防大豪雨突襲。
周三前 南北嚴防大豪雨
氣象局觀測,從上周五到昨晚九時十分,各地累積雨量以高雄市桃源區四三九毫米居
冠,其次是嘉義縣阿里山四○七.五毫米,台中市、南投縣、屏東縣和台南市也有三百毫
米左右的降雨。昨日到晚間九時的單日降雨也是高雄市桃源區最多、高達二二三毫米;其
次是阿里山二一○毫米,南投縣仁愛鄉也有二百毫米,均超過二百毫米的大豪雨標準。
激烈對流雲系 全面侵台
但氣象局指出,過去三天在中南部流竄的暴雨,僅是梅鋒面前緣西南風引發的旺盛對
流胞,今日凌晨之後,鋒面系統挾帶的激烈對流雲系才會從台灣北部海域全面入侵台灣本
島。
原本預測今、明兩天是這波梅雨鋒面侵台降雨最凶猛的時間,但昨日最新氣象資料顯
示,雨勢最猛烈時間將延長到周三,整個西半部都可能出現大豪雨等級以上的災害性暴雨
。
雷雨胞突襲哪裡 難掌握
預報員張承傳指出,梅雨鋒面挾帶的旺盛對流雲系,很難事先精確掌握會在那些地區
引發暴雨。尤其台灣地形複雜,對流雲系跟地形交互作用後,很可能使對流胞更加旺盛發
展,通常要等到系統發展起來,在兩三小時前以雷達觀測,才能有效預測雷雨胞可能突襲
的位置。
總之,整個西半部今到到周三都有可能受暴雨突襲,各地都要提高警覺;東半部也有
豪雨或大雨發生機會。氣象局預測,這波鋒面將在台灣本島滯留到周四。周五起,隨著鋒
面移動到北部海域,各地雨勢減緩,但還是很不穩定,直到周日依舊有陣雨或雷雨發生。
http://news.chinatimes.com/focus/501013491/112013052000076.html
--
今年最強梅雨鋒面從台灣北部海域往南進逼速度減緩,北台灣昨日未如預期出現豪雨
,但中南部受鋒面前緣旺盛西南風引進暴雨影響,昨日被大豪雨灌爆。氣象局預測,這波
鋒面雲系今日全面南壓,西半部今日到周三雨勢更凶猛,從南到北都要嚴防大豪雨突襲。
周三前 南北嚴防大豪雨
氣象局觀測,從上周五到昨晚九時十分,各地累積雨量以高雄市桃源區四三九毫米居
冠,其次是嘉義縣阿里山四○七.五毫米,台中市、南投縣、屏東縣和台南市也有三百毫
米左右的降雨。昨日到晚間九時的單日降雨也是高雄市桃源區最多、高達二二三毫米;其
次是阿里山二一○毫米,南投縣仁愛鄉也有二百毫米,均超過二百毫米的大豪雨標準。
激烈對流雲系 全面侵台
但氣象局指出,過去三天在中南部流竄的暴雨,僅是梅鋒面前緣西南風引發的旺盛對
流胞,今日凌晨之後,鋒面系統挾帶的激烈對流雲系才會從台灣北部海域全面入侵台灣本
島。
原本預測今、明兩天是這波梅雨鋒面侵台降雨最凶猛的時間,但昨日最新氣象資料顯
示,雨勢最猛烈時間將延長到周三,整個西半部都可能出現大豪雨等級以上的災害性暴雨
。
雷雨胞突襲哪裡 難掌握
預報員張承傳指出,梅雨鋒面挾帶的旺盛對流雲系,很難事先精確掌握會在那些地區
引發暴雨。尤其台灣地形複雜,對流雲系跟地形交互作用後,很可能使對流胞更加旺盛發
展,通常要等到系統發展起來,在兩三小時前以雷達觀測,才能有效預測雷雨胞可能突襲
的位置。
總之,整個西半部今到到周三都有可能受暴雨突襲,各地都要提高警覺;東半部也有
豪雨或大雨發生機會。氣象局預測,這波鋒面將在台灣本島滯留到周四。周五起,隨著鋒
面移動到北部海域,各地雨勢減緩,但還是很不穩定,直到周日依舊有陣雨或雷雨發生。
http://news.chinatimes.com/focus/501013491/112013052000076.html
--
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