鋒面接近中~09/04/12 - 颱風討論

By Rosalind
at 2009-04-12T23:04
at 2009-04-12T23:04
Table of Contents
工作的關係~照例提早來聊聊明天的天氣情況~
今天台灣在暖空氣的影響下~果然是個相當炎熱的天氣
天氣狀況大致還不錯~雖然有時雲多一點~但是大部分地方都可見陽光
入夜後的天氣狀況則開始有了一點改變
從今天一天的雲圖可以看出大陸西南有相當明顯的西南渦低壓發展
中高層伴隨有南支槽的建立~大陸西北則有西風北支槽配合跟著東移
冷空氣順著槽後氣流南下~加上槽前環境造成風場的變形
等溫線變得密集造成鋒生~目前大致從安徽的低壓中心向西南延伸到南嶺北部
鋒前有不少的雲層存在~並且隨著鋒面往東南壓而逐漸靠近台灣
不過因為輻合風場的關系~大範圍水平氣流往鋒線會合
台灣目前仍大致位於東南風到偏南風的範圍
迎風的東半部沿海有地形回波逐漸發展起來
廣東沿海以及福建南部沿海也是南風迎向陸地而造成降雨回波的建立
台灣北部近海則有東南氣流繞山造成的逆時針環流
今晚到明天上午隨著地面鋒持續靠近~台灣附近的風向可能再轉為西南風
北部近海的地形環流往北發展~東部沿海的降雨回波往東北發展
廣東福建沿海的降雨回波則會朝台灣過來
目前背風的中部北部逐漸變得迎風~加上又有降雨回波靠近過來
天氣將逐漸變得不穩定~部分地方有機會開始下點短暫陣雨~雨勢還不明顯
反而是目前迎風的宜蘭花蓮會暫時轉為背風~
至於鋒面本身仍然大約會在明天中午前後到達北台灣
到時候降雨的情況將會明顯的增加~中部北部東北部陸續轉為有陣雨的天氣
甚至有機會出現打雷的現象~部分地區雨勢較大
花蓮則應該要到明晚鋒面斷裂~東半段鋒面進入東部海面後才有比較大的下雨機會
南部東南部目前看起來明天下雨的可能性還不高
雲量比較多~但是應該下不了什麼雨
明晚持續受到鋒面雲雨帶影響~中部北部東北部東部有陣雨或雷雨
南部東南部仍為多雲到陰的天氣~降雨預估還是不明顯~雲雨帶位置仍較北邊
溫度部分~明天北台灣的高溫應該會比今天稍低~主要是雲多有雨的關係
明晚以後轉涼的情況將會較為顯著
中南部則還是比較暖熱的情況~冷空氣剛開始下來對中南部的影響有限
提醒大家明天外出要注意天氣方面的改變囉~
以上簡單供參考~
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