天氣概況~2009/06/19~蓮花颱風~ - 颱風討論

By Sandy
at 2009-06-19T09:53
at 2009-06-19T09:53
Table of Contents
今天一到公司就開始忙~好不容易9點多才可以坐下來發文..Orz
經過一天~JMA終於在昨天下午睡醒了~直接把03W升格為蓮花颱風..XD
蓮花颱風形成後由於引導氣流不明顯~到目前為止大致都還在原地附近打轉
從昨天白天到今天清晨正好逆時針的繞了一個小圈
颱風結構也略有發展~至少低層的環流看起來還不差
高層對流受到高空下來的南亞高壓北來風影響被吹成"禿頭"狀態
整體雲系有點不對稱~雲層偏向中心以南的部位
從環境上來看短時間內還有再略為增強的機會
不過隨著副高壓如預期的從颱風以南伸進來~
西南風跟高層北風產生的垂直風切環境也慢慢在形成中
逐漸會對蓮花颱風強度的發展造成阻礙~因此對於這個颱風的巔峰強度並不看好
有可能只會達到輕度颱風的中間等級
而副高壓從南側伸展~從日本以南的鋒面雲系到台灣以東的90W再到蓮花颱風本身
正好成為一個狹長的東北~西南走向的低壓帶
北方黃河流域到日韓一帶不斷有短波槽東移~小槽小脊不停變換
槽不強~但是不斷東移仍使得副高壓無法有非常突破性的改變
更高層的南亞高壓則大致位於青藏高原上~過去一天並沒有明顯的變化產生
整體來看大環境的變動不大~未來兩三天似乎也沒有大動作調整的跡象
因此判斷蓮花颱風的大方向仍將往東北或北北東移動~
實際上從清晨到上午的雲圖來看~它已經有順著轉圈之勢開始往東北緩慢前進的現象
不過大方向確立之後~再來就要看細部的角度變化了~這也是對台灣影響大小的關鍵
目前的預測從東北東到北北東的方向都有~分歧度還蠻大的
決定的點在於90W跟蓮花颱風之間的空隙變動狀況
90W移動的速度比較快~蓮花則走得比較慢
兩者之間的空隙有逐漸拉大的可能
這樣一來就有機會讓兩者之間產生小範圍的高壓區~甚至讓副高壓見縫插針
因此目前個人的看法是傾向會先走東北~然後轉向北北東
以逆轉的拋物線路徑移動的機會較大
也就是往台灣海峽南部或是恆春半島靠近的可能性較高
而這兩種路線對台灣來說似乎都不太有利
往海峽南部走然後北上~即使中心不登陸~也會帶來頗強的西南氣流
中南部免不了會有豪大雨的機會~後續颱風北上後西南氣流可能還會影響好幾天
而直接靠近恆春半島或是南部地區當然威脅也就更大了
不只有豪雨~還有較強風勢的情況會出現
後續也還會有西南氣流影響台灣
預估影響最大的時間正好就落在週六到下週一這段時間
目前颱風速度還不快~一但開始移動之後速度就會逐漸加速
氣象局有可能在今晚到明天會陸續發布颱風警報
今天颱風的外圍已經有部份雲層開始進來了~南部一早就下了雨
不過今天白天颱風對台灣的影響還不大~目前這些雲應該很快就會慢慢散去
後續還會有些外圍雲層可能影響花東以及恆春半島一帶~帶來局部的短暫陣雨
其他地方則是多雲午後有局部雷雨的天氣~西半部的山區普遍都有可能發生
今晚起到明天白天受颱風外圍環流的影響~東半部以及南部逐漸轉為陣雨的天氣
北部也將轉為有短暫陣雨的情況~中部受影響較小~但也會有局部降雨發生
其中在東南部以及恆春半島的雨勢會比較明顯~
再來的情況就要看颱風的路線而定了~颱風路線越靠近台灣則週日的天氣就會越糟糕
目前還無法有很明確的預測~應該今天再觀察一下就會比較明朗
總之這個週末將會遇上颱風來襲~提醒大家到下週一之前的行程都要有調整的準備
下週之後也還要注意西南氣流的影響~天氣狀況可能還是不太好
今晚再繼續為大家分析~先簡單供參考囉~
--
經過一天~JMA終於在昨天下午睡醒了~直接把03W升格為蓮花颱風..XD
蓮花颱風形成後由於引導氣流不明顯~到目前為止大致都還在原地附近打轉
從昨天白天到今天清晨正好逆時針的繞了一個小圈
颱風結構也略有發展~至少低層的環流看起來還不差
高層對流受到高空下來的南亞高壓北來風影響被吹成"禿頭"狀態
整體雲系有點不對稱~雲層偏向中心以南的部位
從環境上來看短時間內還有再略為增強的機會
不過隨著副高壓如預期的從颱風以南伸進來~
西南風跟高層北風產生的垂直風切環境也慢慢在形成中
逐漸會對蓮花颱風強度的發展造成阻礙~因此對於這個颱風的巔峰強度並不看好
有可能只會達到輕度颱風的中間等級
而副高壓從南側伸展~從日本以南的鋒面雲系到台灣以東的90W再到蓮花颱風本身
正好成為一個狹長的東北~西南走向的低壓帶
北方黃河流域到日韓一帶不斷有短波槽東移~小槽小脊不停變換
槽不強~但是不斷東移仍使得副高壓無法有非常突破性的改變
更高層的南亞高壓則大致位於青藏高原上~過去一天並沒有明顯的變化產生
整體來看大環境的變動不大~未來兩三天似乎也沒有大動作調整的跡象
因此判斷蓮花颱風的大方向仍將往東北或北北東移動~
實際上從清晨到上午的雲圖來看~它已經有順著轉圈之勢開始往東北緩慢前進的現象
不過大方向確立之後~再來就要看細部的角度變化了~這也是對台灣影響大小的關鍵
目前的預測從東北東到北北東的方向都有~分歧度還蠻大的
決定的點在於90W跟蓮花颱風之間的空隙變動狀況
90W移動的速度比較快~蓮花則走得比較慢
兩者之間的空隙有逐漸拉大的可能
這樣一來就有機會讓兩者之間產生小範圍的高壓區~甚至讓副高壓見縫插針
因此目前個人的看法是傾向會先走東北~然後轉向北北東
以逆轉的拋物線路徑移動的機會較大
也就是往台灣海峽南部或是恆春半島靠近的可能性較高
而這兩種路線對台灣來說似乎都不太有利
往海峽南部走然後北上~即使中心不登陸~也會帶來頗強的西南氣流
中南部免不了會有豪大雨的機會~後續颱風北上後西南氣流可能還會影響好幾天
而直接靠近恆春半島或是南部地區當然威脅也就更大了
不只有豪雨~還有較強風勢的情況會出現
後續也還會有西南氣流影響台灣
預估影響最大的時間正好就落在週六到下週一這段時間
目前颱風速度還不快~一但開始移動之後速度就會逐漸加速
氣象局有可能在今晚到明天會陸續發布颱風警報
今天颱風的外圍已經有部份雲層開始進來了~南部一早就下了雨
不過今天白天颱風對台灣的影響還不大~目前這些雲應該很快就會慢慢散去
後續還會有些外圍雲層可能影響花東以及恆春半島一帶~帶來局部的短暫陣雨
其他地方則是多雲午後有局部雷雨的天氣~西半部的山區普遍都有可能發生
今晚起到明天白天受颱風外圍環流的影響~東半部以及南部逐漸轉為陣雨的天氣
北部也將轉為有短暫陣雨的情況~中部受影響較小~但也會有局部降雨發生
其中在東南部以及恆春半島的雨勢會比較明顯~
再來的情況就要看颱風的路線而定了~颱風路線越靠近台灣則週日的天氣就會越糟糕
目前還無法有很明確的預測~應該今天再觀察一下就會比較明朗
總之這個週末將會遇上颱風來襲~提醒大家到下週一之前的行程都要有調整的準備
下週之後也還要注意西南氣流的影響~天氣狀況可能還是不太好
今晚再繼續為大家分析~先簡單供參考囉~
--
Tags:
颱風
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