天氣概況~2008/07/21 - 颱風討論
By Enid
at 2008-07-21T09:36
at 2008-07-21T09:36
Table of Contents
寫到一半無線網卡居然當掉= =
沒有時間重寫~只好簡單的敘述一下了~
昨天的天氣已經恢復到比較正常的夏季型天氣
雖然山區還是有午後雷雨~但是範圍比模式預期要少得多
大部分平地都是晴朗炎熱為主
目前太平洋副高壓從日本附近往西南延伸經琉球到台灣附近
呈現東北-西南狀的傾斜
今天台灣附近的風向仍以偏西南風到偏南風為主
天氣將維持晴午後雷雨的型態~午後雷雨的範圍跟雨量都不大
主要都是下在山區~平地的天氣算是蠻好的
溫度偏高~紫外線很強~提醒大家要做好防曬跟防中暑的準備
未來副高壓的型態將逐漸作出調整
由目前的傾斜狀慢慢北抬拉平~轉變成偏東西向的高壓脊
高壓的主要勢力位於日本附近~邊緣向西延伸到東海一帶
台灣的風向也會在未來兩天逐漸從目前的西南風偏南風調整為偏東到東南風為主
天氣持續晴朗穩定炎熱~山區有局部的午後熱對流降雨
再來要特別注意的就是目前在琉球以東海面上的的擾動97W
過去一天它在溫暖的洋面上持續醞釀
旋轉的相當明顯~不過還未能完全轉化為暖心系統(中心附近仍無雲)
未來在太平洋高壓引導下將緩慢偏西移動
由於它的環流範圍頗大~在雲層逐漸組織發展的過程中中心會有跳動的情況
因此會顯得路徑有些不穩定
但是大體仍是以偏西移動為主~整體低壓區自東向西移動
接下來兩三天將緩慢移到琉球東南方海域
預料未來隨著高壓型態調整~大氣環境的條件將有所好轉
不論輻合或是輻散都會有改善的機會
加上它可能經過的海域海溫甚高~對它的發展加強有利
擾動強度將逐漸增強~來到台灣東方海面時應該已經是熱帶低壓甚至是颱風強度
如果北邊高壓的型態變化不大的話
這個擾動有直撲台灣而來的潛在危險
但是高壓勢力隨時可能會有變化~只要稍為弱一點擾動就可能轉往琉球一帶北上
因此還需要觀察2~3天才會明朗
目前來看影響台灣跟影響琉球的機會大概是五五波
以台灣剛剛遭受卡玫基豪雨的情況來看~這一隻還是不來會比較好
但是天氣並非人類所能掌控~只能以戒慎的心情來看待變化的過程
以上簡單供參考囉~
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颱風
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