榖雨春雷響~09/04/20 - 颱風討論

By Frederic
at 2009-04-20T20:27
at 2009-04-20T20:27
Table of Contents
今天是24節氣中的榖雨~是春天的中的最後一個節氣
意味著百穀之雨~即將進入夏季的開端
很湊巧的今天有鋒面通過~而且情況又是相當有趣的過程
因為鋒面似乎又"高低分離"了..XD
原因同樣是因為冷空氣不夠強的關係
清晨前地面鋒來到福建沿海後就出現停滯不前的現象
中高層的槽線則持續向東移出~推動中高層的鋒先行掃過台灣
配合北邊氣旋的加深發展~暖濕輸送明顯
因此高層鋒過境時帶來了劇烈的強對流發展
因為風向偏南~降雨最多的地方如預期的是在中部以及南部山區
北部雖然也是打雷降雨~但是雨勢就明顯較小
至於地面鋒目前似乎才正在通過北台灣上空
這也使得雲圖上看起來強對流都已經過去了~但是北台灣卻還不時有驟雨的情況
http://www.jma.go.jp/jp/gms/imgs_c/0/infrared/0/200904202030-00.png
從地面風的變化也可以發現~今天白天到傍晚都持續是南風為主
目前北台灣才正在逐漸轉為西風到西北風
而持續受到鋒前南風影響的中南部山區也持續有降雨回波在山區維持不散
雖然強對流一掃而過~降雨的確是如預期的趨於緩和了
但是地面鋒過境的時間比預期晚得多~因此今晚各地還是容易有局部短暫的驟雨出現
北部東北部以及中南部的山區仍有局部較大降雨的機會
天氣真正要穩定可能要到明天~地面鋒也東移南壓後~
較乾的微弱東北風接手影響台灣~
除迎風面仍有零星降雨以外~其他地方的天氣將好轉
不過鋒面會停留在巴士海峽~南部的朋友也要稍微留意是否有殘留的雲層影響
溫度方面也要等到明天北台灣才會稍微轉涼~較為舒適
中南部則還是相當暖熱的情況
CWB的預報也修正為較穩定的好天氣~不再堅持預測一堆降雨
最後一提的是南海南部~原本在菲律賓南部的低壓環流已經進入這邊
對流雲團持續爆發~可能逐漸會有較明顯的LLCC發展出來
未來對它的演變需要特別注意~
以上先簡單供參考囉~
--
意味著百穀之雨~即將進入夏季的開端
很湊巧的今天有鋒面通過~而且情況又是相當有趣的過程
因為鋒面似乎又"高低分離"了..XD
原因同樣是因為冷空氣不夠強的關係
清晨前地面鋒來到福建沿海後就出現停滯不前的現象
中高層的槽線則持續向東移出~推動中高層的鋒先行掃過台灣
配合北邊氣旋的加深發展~暖濕輸送明顯
因此高層鋒過境時帶來了劇烈的強對流發展
因為風向偏南~降雨最多的地方如預期的是在中部以及南部山區
北部雖然也是打雷降雨~但是雨勢就明顯較小
至於地面鋒目前似乎才正在通過北台灣上空
這也使得雲圖上看起來強對流都已經過去了~但是北台灣卻還不時有驟雨的情況
http://www.jma.go.jp/jp/gms/imgs_c/0/infrared/0/200904202030-00.png

從地面風的變化也可以發現~今天白天到傍晚都持續是南風為主
目前北台灣才正在逐漸轉為西風到西北風
而持續受到鋒前南風影響的中南部山區也持續有降雨回波在山區維持不散
雖然強對流一掃而過~降雨的確是如預期的趨於緩和了
但是地面鋒過境的時間比預期晚得多~因此今晚各地還是容易有局部短暫的驟雨出現
北部東北部以及中南部的山區仍有局部較大降雨的機會
天氣真正要穩定可能要到明天~地面鋒也東移南壓後~
較乾的微弱東北風接手影響台灣~
除迎風面仍有零星降雨以外~其他地方的天氣將好轉
不過鋒面會停留在巴士海峽~南部的朋友也要稍微留意是否有殘留的雲層影響
溫度方面也要等到明天北台灣才會稍微轉涼~較為舒適
中南部則還是相當暖熱的情況
CWB的預報也修正為較穩定的好天氣~不再堅持預測一堆降雨
最後一提的是南海南部~原本在菲律賓南部的低壓環流已經進入這邊
對流雲團持續爆發~可能逐漸會有較明顯的LLCC發展出來
未來對它的演變需要特別注意~
以上先簡單供參考囉~
--
Tags:
颱風
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