天氣概況~2012/08/01~蘇拉颱風逼近東北部近海~ - 颱風討論
By Steve
at 2012-08-01T09:51
at 2012-08-01T09:51
Table of Contents
本來昨晚想加發一篇文~不過有事在忙加上變化不大~就留到現在一起發~
過去一天蘇拉大致如預期的搖搖擺擺往北北西到西北方向移動~
雖然走的晃來晃去~不過如果把過去路線拉成平滑線條的話~偏西的分量的確是有出來~
一方面是台灣的地形在拉它~另一方面也是因為逐漸靠近台灣北部海域東風急流的關係~
不過從氣壓場來看~因為丹瑞颱風快速靠近九州南部~跟蘇拉連成大範圍低壓帶~
氣壓梯度較強的區域跟蘇拉的核心保持距離~使得蘇拉一直無法邁開大步移動~
其實這算不上藤原效應~因為到目前兩個颱風都還沒有因為交互作用產生異常的"移動"~
蘇拉雖然慢~但是這跟沒接上引導的關係較大~
丹瑞則是在引導很強的狀況下高速前進~想要被蘇拉牽引的機會似乎也不大~
引導不夠強~包括地形以及颱風旋轉內力的beta效應等作用力影響就會變大~
沒有特殊變化的話~預估蘇拉颱風仍將繼續搖搖擺擺往宜蘭東方海面靠近~
也就是逐漸朝台灣東北部海域接近過來~
今晚到明晨間就會慢慢來到宜蘭的東方~
此時關鍵性的地形作用會不會把它往西拉進來就非常重要了~
如果有~中心登陸東北角的可能性就很高~
如果沒有~出現西北颱路線的可能性就相對較大~
未來24小時內的變化應該會非常有意思~大家不妨多多注意~
颱風的強度跟昨天比起來是有再增強的~
如昨天預期的~核心環流向內收緊~眼睛的部份結構也比昨天要好一些~
不過受制於北邊東海不斷有高壓下沉造成的乾空氣捲入影響~
整個眼牆始終鞏固不好~往往看似建立卻又很快的出現缺口~
不是蘇拉不努力~而是乾空氣的干擾太過明顯了一點~
雖然核心環流內縮~但是外圍還是很寬廣~
因此昨天一天台灣迎風面陣風陣雨不斷~特別是雨下的很多~迎風的宜蘭山區雨量驚人~
只是大家也可以發現風力似乎強度變化不大~一整天不上不下的~
這也是氣壓場比較均勻的現象~連帶呼應上面提到蘇拉移動不快的原因~
內圈收縮後~要等到中心更靠近後~氣壓才會迅速下降~
這時候氣壓差有出來~就會感受到風力快速加強的現象~
目前颱風的位置有所改變~台灣附近的風向也逐漸由前兩天的東風東北風漸轉偏北風~
宜蘭地區持續是最明顯的迎風面區域~北北東-南南西走向的回波還是不斷的甩進來~
然後是花蓮一帶~回波也是持續甩入~
台北這邊則有些變化~原本風向偏東時延著雪山山脈存在的回波逐漸消失~
加上陽明山區的阻擋~風雨的感覺反而有點變小的現象~
桃竹苗一帶持續是順向的風~跟地形的交角也不大~呈現有風雨少的狀態~
要等到西北風能夠進來時~北部地區的風雨才會再度變大~山區雨量也才會快速增加~
中部以南地區的背風低壓正順著風向改變往南移動~
未來可能逐漸轉移到台灣東南部海域~
中南部地區仍然要等到西北風跟西南風能夠進來後~風雨才會明顯起來~
花蓮以南地區未來則是要注意何時開始出現焚風的情況~
整體而言~隨著颱風靠近~風雨應該是會增強的~不過各地的情況不同~
今天感受最大的區域仍是在花蓮以北~北部地區大概下午傍晚以後西北風進來~風雨會再起
中部以南地區目前的看法仍是要等到明晨以後~颱風更靠近東北角時~
西北風範圍往南蔓延~西南風也逐漸能進來時~風雨才會趨於明顯~
雖然主要的西南氣流似乎有逐漸被東邊的99W所拉走~
但是西南風只要能進來~中南部山區仍會有出現明顯爬山流降雨的情況~不能掉以輕心~
花蓮以南到台東一帶由於逐漸會進入背風低壓區~風雨的情況不是很明顯~
大概到今晚以後要開始留意焚風發生~西北風過山下沉就可能造成焚風~
明天白天將是颱風離台灣最近的一段時間~
前面提到中心是進來還是近海通過就要看地形跟颱風怎麼互動而定~
包括北部東北部以及整個西半部地區都要嚴防強風豪雨~
花東地區則是要注意焚風現象~還有是否出現回南風~
一但有回南風~台東地區就可能出現風雨的情況~
明晚以後颱風將逐漸趨向大陸福建浙江交界區~
西南風仍將影響台灣中南部~不過影響也會隨颱風遠離而逐漸減小~
整體來看~這颱風對台灣還有一天半左右的影響時間~
請大家要持續做好防颱準備~萬事多小心~就能多一分保障~
目前颱風中心已經在雷達上清楚可見了~大家不妨多加利用~做即時的追蹤~
以上簡單供參考囉~
--
過去一天蘇拉大致如預期的搖搖擺擺往北北西到西北方向移動~
雖然走的晃來晃去~不過如果把過去路線拉成平滑線條的話~偏西的分量的確是有出來~
一方面是台灣的地形在拉它~另一方面也是因為逐漸靠近台灣北部海域東風急流的關係~
不過從氣壓場來看~因為丹瑞颱風快速靠近九州南部~跟蘇拉連成大範圍低壓帶~
氣壓梯度較強的區域跟蘇拉的核心保持距離~使得蘇拉一直無法邁開大步移動~
其實這算不上藤原效應~因為到目前兩個颱風都還沒有因為交互作用產生異常的"移動"~
蘇拉雖然慢~但是這跟沒接上引導的關係較大~
丹瑞則是在引導很強的狀況下高速前進~想要被蘇拉牽引的機會似乎也不大~
引導不夠強~包括地形以及颱風旋轉內力的beta效應等作用力影響就會變大~
沒有特殊變化的話~預估蘇拉颱風仍將繼續搖搖擺擺往宜蘭東方海面靠近~
也就是逐漸朝台灣東北部海域接近過來~
今晚到明晨間就會慢慢來到宜蘭的東方~
此時關鍵性的地形作用會不會把它往西拉進來就非常重要了~
如果有~中心登陸東北角的可能性就很高~
如果沒有~出現西北颱路線的可能性就相對較大~
未來24小時內的變化應該會非常有意思~大家不妨多多注意~
颱風的強度跟昨天比起來是有再增強的~
如昨天預期的~核心環流向內收緊~眼睛的部份結構也比昨天要好一些~
不過受制於北邊東海不斷有高壓下沉造成的乾空氣捲入影響~
整個眼牆始終鞏固不好~往往看似建立卻又很快的出現缺口~
不是蘇拉不努力~而是乾空氣的干擾太過明顯了一點~
雖然核心環流內縮~但是外圍還是很寬廣~
因此昨天一天台灣迎風面陣風陣雨不斷~特別是雨下的很多~迎風的宜蘭山區雨量驚人~
只是大家也可以發現風力似乎強度變化不大~一整天不上不下的~
這也是氣壓場比較均勻的現象~連帶呼應上面提到蘇拉移動不快的原因~
內圈收縮後~要等到中心更靠近後~氣壓才會迅速下降~
這時候氣壓差有出來~就會感受到風力快速加強的現象~
目前颱風的位置有所改變~台灣附近的風向也逐漸由前兩天的東風東北風漸轉偏北風~
宜蘭地區持續是最明顯的迎風面區域~北北東-南南西走向的回波還是不斷的甩進來~
然後是花蓮一帶~回波也是持續甩入~
台北這邊則有些變化~原本風向偏東時延著雪山山脈存在的回波逐漸消失~
加上陽明山區的阻擋~風雨的感覺反而有點變小的現象~
桃竹苗一帶持續是順向的風~跟地形的交角也不大~呈現有風雨少的狀態~
要等到西北風能夠進來時~北部地區的風雨才會再度變大~山區雨量也才會快速增加~
中部以南地區的背風低壓正順著風向改變往南移動~
未來可能逐漸轉移到台灣東南部海域~
中南部地區仍然要等到西北風跟西南風能夠進來後~風雨才會明顯起來~
花蓮以南地區未來則是要注意何時開始出現焚風的情況~
整體而言~隨著颱風靠近~風雨應該是會增強的~不過各地的情況不同~
今天感受最大的區域仍是在花蓮以北~北部地區大概下午傍晚以後西北風進來~風雨會再起
中部以南地區目前的看法仍是要等到明晨以後~颱風更靠近東北角時~
西北風範圍往南蔓延~西南風也逐漸能進來時~風雨才會趨於明顯~
雖然主要的西南氣流似乎有逐漸被東邊的99W所拉走~
但是西南風只要能進來~中南部山區仍會有出現明顯爬山流降雨的情況~不能掉以輕心~
花蓮以南到台東一帶由於逐漸會進入背風低壓區~風雨的情況不是很明顯~
大概到今晚以後要開始留意焚風發生~西北風過山下沉就可能造成焚風~
明天白天將是颱風離台灣最近的一段時間~
前面提到中心是進來還是近海通過就要看地形跟颱風怎麼互動而定~
包括北部東北部以及整個西半部地區都要嚴防強風豪雨~
花東地區則是要注意焚風現象~還有是否出現回南風~
一但有回南風~台東地區就可能出現風雨的情況~
明晚以後颱風將逐漸趨向大陸福建浙江交界區~
西南風仍將影響台灣中南部~不過影響也會隨颱風遠離而逐漸減小~
整體來看~這颱風對台灣還有一天半左右的影響時間~
請大家要持續做好防颱準備~萬事多小心~就能多一分保障~
目前颱風中心已經在雷達上清楚可見了~大家不妨多加利用~做即時的追蹤~
以上簡單供參考囉~
--
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