天氣小觀:週末擾動西移進入南海,北東輻合降雨 - 颱風討論
By Barb Cronin
at 2022-10-18T21:03
at 2022-10-18T21:03
Table of Contents
天氣小觀:週末東風波擾動西移進入南海,北部東部輻合降雨
昨天以前一連三天的尼莎颱風超大豪雨隨著尼莎遠離結束,
事實上,
昨天高空西風槽向東偏移,連帶太平洋高壓也東退,
台灣高空的輻散通道並沒有很強的噴流,
因此,昨天的秋颱共伴效應主要是地面噴流強力驅動,侷限在東北季風迎風面。
如果不看尼莎颱風帶上赤道氣團爬升在東北季風之上,
還真的很像是異常東北季風降雨(強勁東北季風+高空西風槽前輻散),
不過,
這個高空輻散通道到底還是尼莎颱風與太平洋高壓配置帶來的,
因此還是屬於"秋颱共伴的配置"(大氣中層的輻散噴流東海東側往台灣的弱延伸)
,只是這配置看來有點偏。
下個要注意的依舊是"秋季大氣地面秀",南方熱海一片,
新的擾動周末東移入南海,這次的擾動看來不大會成颱,
同時南亞高壓併入太平洋高壓系統後,太平洋高壓蹲下又跳躍發奮喷圖強短暫西伸華南,
因此,看來是東風波擾動的雲雨帶影響台灣東部/東北部/北部。
東風波撞進台灣東部/北部,宜蘭的畚箕地形還是最容易攔截水氣降雨。
之後再接上週日以後另一個冷高壓南下,東北季風增強降雨,北部東北部依舊多雨。
(簡單說說囉)
--
昨天以前一連三天的尼莎颱風超大豪雨隨著尼莎遠離結束,
事實上,
昨天高空西風槽向東偏移,連帶太平洋高壓也東退,
台灣高空的輻散通道並沒有很強的噴流,
因此,昨天的秋颱共伴效應主要是地面噴流強力驅動,侷限在東北季風迎風面。
如果不看尼莎颱風帶上赤道氣團爬升在東北季風之上,
還真的很像是異常東北季風降雨(強勁東北季風+高空西風槽前輻散),
不過,
這個高空輻散通道到底還是尼莎颱風與太平洋高壓配置帶來的,
因此還是屬於"秋颱共伴的配置"(大氣中層的輻散噴流東海東側往台灣的弱延伸)
,只是這配置看來有點偏。
下個要注意的依舊是"秋季大氣地面秀",南方熱海一片,
新的擾動周末東移入南海,這次的擾動看來不大會成颱,
同時南亞高壓併入太平洋高壓系統後,太平洋高壓蹲下又跳躍發奮喷圖強短暫西伸華南,
因此,看來是東風波擾動的雲雨帶影響台灣東部/東北部/北部。
東風波撞進台灣東部/北部,宜蘭的畚箕地形還是最容易攔截水氣降雨。
之後再接上週日以後另一個冷高壓南下,東北季風增強降雨,北部東北部依舊多雨。
(簡單說說囉)
--
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