天氣概況~2009/10/18~盧碧颱風~ - 颱風討論

By Mia
at 2009-10-18T09:31
at 2009-10-18T09:31
Table of Contents
目前的焦點集中在盧碧颱風身上
過去兩天盧碧的走向以及強度變化大致都跟預想的差不多
強度屬於穩定增強~環境雖然不錯但是高層缺少了強有力的外流管道
靠著自身建立的高層反氣旋來進行高層輻散的角色~比較沒有瞬間增強的機會
但是昨天在眼牆建立後~強度增強的情況也比前天要來得明顯許多
路線上也如預期的先偏西後轉偏北~偏北角度果然甚大~轉向角較尖銳
陷入西風槽造成的高壓弱點鞍場內因此速度大為減慢~昨天一天一路搖擺北飄
今天看起來逐漸會走到關鍵點的位置上
西風槽昨天接近颱風正北方~目前正在通過颱風以北
槽底的位置大約在25~26N左右~離颱風還是遠了一些(超過5個緯度)
對於鞍場東側高壓的影響力也來到最大~
盧碧昨晚到今晨不但偏北飄移~甚至有北北東移動的現象
這都是東側引導高壓明顯被槽線削弱的現象
但是颱風的速度仍然不快~這表示颱風只是順著高壓形狀的變化而移動
鞍場西側的高壓對它仍有相當的牽制力~槽底也沒有真正勾到颱風
如果沒有這兩個因素~盧碧現在應該已經轉向成功加速往東北走了
而槽線即將通過颱風正北~現在還拉不到的話~也就大致可以確定不會帶走颱風
華北目前還有一個西風槽正在東移中
不過似乎跟前面正影響颱風的這個西風槽太接近
兩相干擾下~後面要移出的槽強度相對較弱~東移過程中加深的幅度也不會太大
預估今天盧碧仍然陷於鞍場內~仍將緩慢北飄~甚至向北北東到東北偏移
環境上在今天白天到明天清晨之間(未來24小時)的變化則為~
颱風正北的西風槽A逐漸東移淺化~後續的西風槽B東進到日本海但是不夠深厚
台灣經琉球到日本南方海面一帶~也就是颱風北側跟西北側將逐漸被反氣旋負渦度取代
這將誘使鞍場兩邊的高壓逐漸在颱風北面連接~特別是西環高壓的擴大增強
引導盧碧重新轉向西北西或偏西方向移動
目前個人預估轉西的點應該會在18N線上下~明天白天(24小時後)就可能轉西回頭
而轉西後表示高壓脊建立~引導加強~颱風速度也將逐漸加快~
下週三到週五之間(21~23號)將在呂宋島北端或呂宋北方海域由東向西通過
目前有模式作出通過呂宋島附近這段期間可能有些許偏西南西的走向出現
這也是有可能的~看起來跟槽後脊與西環副高壓疊加壓迫有關
不過會不會發生還有待觀察
暫時看起來颱風直撲台灣的機會不大~但是經過台灣以南的距離遠近很重要
未來兩天還需要密切觀察這個變化的實際情況
至於共伴的效果如何~明天再來聊這個部分~模式的預測仍較分歧
盧碧颱風的強度方面也很有趣~
過去一天隨著眼牆建立~結構趨於成熟~強度明顯提升(目前為115Kts)
不過大家也可以發現颱風環流雲系明顯的緊縮
特別是核心部分縮小的相當顯著~颱風整體雲層看起來也沒有之前來的那麼龐大
這個一方面是颱風渦度加強~環流原本就趨向於收緊(本體部分結構相當不錯)
另一方面也跟西風槽後帶來的乾空氣有關
雖然沒有直接侵蝕到核心環流~不過也確實消減了盧碧原本龐大的外圍雲帶
預估未來24小時西風槽後下來的乾空氣會趨緩
而颱風恢復西進後~接近呂宋島的過程中也將跟南海的西南季風主力搭上線
因此未來盧碧的強度仍看好會繼續增強
特別是三天後接近呂宋島之前可能達到強度顛峰~上看5級颱風的程度仍是有機會
暫時看起來最缺的還是高空外流通道~
西風槽幅散對它幫助不大~TUTT則遠退到中太平洋一帶也幫不上忙
盧碧靠自己自立自強~強度發展會比較緩慢~比不上開外掛的颱風那樣暴衝
但是慢慢磨也可能磨出可怕的威力~可以密切的留意看看
至於今天明天台灣的天氣不錯~主要都是槽後較乾空氣的影響
雖然乾空氣會趨緩~不過地面高壓以及颱風外圍下沉仍然會讓天氣維持穩定
只有迎風的東北部東部雲量較多~山區有零星的飄雨機會
溫度上白天普遍有陽光~還算是溫暖舒適
夜晚清晨中北部東北部東部會比較涼~南部東南部則是舒適等級
海邊風浪較大~特別是盧碧颱風的長浪接近~到海邊活動請特別注意
後天週二(20號)起盧碧颱風外圍的雲層逐漸靠近過來
天氣情況才可能會開始有些變化出現
在這之前是難得的好天氣~大家可以好好把握~
以上簡單供參考囉~
--
過去兩天盧碧的走向以及強度變化大致都跟預想的差不多
強度屬於穩定增強~環境雖然不錯但是高層缺少了強有力的外流管道
靠著自身建立的高層反氣旋來進行高層輻散的角色~比較沒有瞬間增強的機會
但是昨天在眼牆建立後~強度增強的情況也比前天要來得明顯許多
路線上也如預期的先偏西後轉偏北~偏北角度果然甚大~轉向角較尖銳
陷入西風槽造成的高壓弱點鞍場內因此速度大為減慢~昨天一天一路搖擺北飄
今天看起來逐漸會走到關鍵點的位置上
西風槽昨天接近颱風正北方~目前正在通過颱風以北
槽底的位置大約在25~26N左右~離颱風還是遠了一些(超過5個緯度)
對於鞍場東側高壓的影響力也來到最大~
盧碧昨晚到今晨不但偏北飄移~甚至有北北東移動的現象
這都是東側引導高壓明顯被槽線削弱的現象
但是颱風的速度仍然不快~這表示颱風只是順著高壓形狀的變化而移動
鞍場西側的高壓對它仍有相當的牽制力~槽底也沒有真正勾到颱風
如果沒有這兩個因素~盧碧現在應該已經轉向成功加速往東北走了
而槽線即將通過颱風正北~現在還拉不到的話~也就大致可以確定不會帶走颱風
華北目前還有一個西風槽正在東移中
不過似乎跟前面正影響颱風的這個西風槽太接近
兩相干擾下~後面要移出的槽強度相對較弱~東移過程中加深的幅度也不會太大
預估今天盧碧仍然陷於鞍場內~仍將緩慢北飄~甚至向北北東到東北偏移
環境上在今天白天到明天清晨之間(未來24小時)的變化則為~
颱風正北的西風槽A逐漸東移淺化~後續的西風槽B東進到日本海但是不夠深厚
台灣經琉球到日本南方海面一帶~也就是颱風北側跟西北側將逐漸被反氣旋負渦度取代
這將誘使鞍場兩邊的高壓逐漸在颱風北面連接~特別是西環高壓的擴大增強
引導盧碧重新轉向西北西或偏西方向移動
目前個人預估轉西的點應該會在18N線上下~明天白天(24小時後)就可能轉西回頭
而轉西後表示高壓脊建立~引導加強~颱風速度也將逐漸加快~
下週三到週五之間(21~23號)將在呂宋島北端或呂宋北方海域由東向西通過
目前有模式作出通過呂宋島附近這段期間可能有些許偏西南西的走向出現
這也是有可能的~看起來跟槽後脊與西環副高壓疊加壓迫有關
不過會不會發生還有待觀察
暫時看起來颱風直撲台灣的機會不大~但是經過台灣以南的距離遠近很重要
未來兩天還需要密切觀察這個變化的實際情況
至於共伴的效果如何~明天再來聊這個部分~模式的預測仍較分歧
盧碧颱風的強度方面也很有趣~
過去一天隨著眼牆建立~結構趨於成熟~強度明顯提升(目前為115Kts)
不過大家也可以發現颱風環流雲系明顯的緊縮
特別是核心部分縮小的相當顯著~颱風整體雲層看起來也沒有之前來的那麼龐大
這個一方面是颱風渦度加強~環流原本就趨向於收緊(本體部分結構相當不錯)
另一方面也跟西風槽後帶來的乾空氣有關
雖然沒有直接侵蝕到核心環流~不過也確實消減了盧碧原本龐大的外圍雲帶
預估未來24小時西風槽後下來的乾空氣會趨緩
而颱風恢復西進後~接近呂宋島的過程中也將跟南海的西南季風主力搭上線
因此未來盧碧的強度仍看好會繼續增強
特別是三天後接近呂宋島之前可能達到強度顛峰~上看5級颱風的程度仍是有機會
暫時看起來最缺的還是高空外流通道~
西風槽幅散對它幫助不大~TUTT則遠退到中太平洋一帶也幫不上忙
盧碧靠自己自立自強~強度發展會比較緩慢~比不上開外掛的颱風那樣暴衝
但是慢慢磨也可能磨出可怕的威力~可以密切的留意看看
至於今天明天台灣的天氣不錯~主要都是槽後較乾空氣的影響
雖然乾空氣會趨緩~不過地面高壓以及颱風外圍下沉仍然會讓天氣維持穩定
只有迎風的東北部東部雲量較多~山區有零星的飄雨機會
溫度上白天普遍有陽光~還算是溫暖舒適
夜晚清晨中北部東北部東部會比較涼~南部東南部則是舒適等級
海邊風浪較大~特別是盧碧颱風的長浪接近~到海邊活動請特別注意
後天週二(20號)起盧碧颱風外圍的雲層逐漸靠近過來
天氣情況才可能會開始有些變化出現
在這之前是難得的好天氣~大家可以好好把握~
以上簡單供參考囉~
--
Tags:
颱風
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