天氣小觀:模式看壞,下週鋒面雲雨帶減弱 - 颱風討論
By Mia
at 2021-04-03T10:25
at 2021-04-03T10:25
Table of Contents
天氣小觀:南亞副高分裂東移,模式看壞,下週鋒面雲雨帶減弱
原先預報的清明連假過後的鋒面,
雖然太平洋高壓如預期西風槽逼著東退,但南亞副高卻分裂副高東移往中南半島,
導致後期低空噴流減弱無法帶上印度洋水氣,因此模式看壞後期的鋒面雲雨帶降水。
模式預報,由於南海副高壟罩,台灣出現高溫,
北方冷空氣依舊活動在長江流域以北,
不過蒙古冷高壓已經準備南下了,明起東北季風增強降溫,
往年4月中旬過後就是準備和東北季風說掰掰的時節了,
但蒙古/西伯利亞冷高壓目前還有餘力揮軍南下,因此降溫還是很明顯。
地面東北季風南下後,開始抬升台灣附近的暖空氣,
然而,
南方副高已經不是省油的燈,由於南海副高目前重新增強,
因此明天南下的冷鋒只剩下東北季風的地形雨,
中南部山區就看東北季風減弱後,東北風的背風低壓是否可配合熱對流降雨。
週四以後另一波西風槽再壓下,
南海副高減弱南退,並且準備銜接南亞副高分裂東移,
與分裂東移的南亞副高單體結合後,
一週尾聲,
南海副高又增強了。@@
同時部分模式也預報了,一週尾聲遠方的西北太平洋高壓崛起了。
太平洋高壓也要來了嗎。@@
往年4月是太平洋高壓崛起後與南亞副高(此時孟加拉灣西南季風尚未爆發)連結,
因此4月是太平洋高壓勢力範圍最大的時節。(4月最大,8月最強)
不過,對需要水的台灣,就是久旱偏逢連高壓,
如果4月春雨再不明顯,
就只能等5月梅雨和南海西南季風爆發。
(以上供參囉)
--
原先預報的清明連假過後的鋒面,
雖然太平洋高壓如預期西風槽逼著東退,但南亞副高卻分裂副高東移往中南半島,
導致後期低空噴流減弱無法帶上印度洋水氣,因此模式看壞後期的鋒面雲雨帶降水。
模式預報,由於南海副高壟罩,台灣出現高溫,
北方冷空氣依舊活動在長江流域以北,
不過蒙古冷高壓已經準備南下了,明起東北季風增強降溫,
往年4月中旬過後就是準備和東北季風說掰掰的時節了,
但蒙古/西伯利亞冷高壓目前還有餘力揮軍南下,因此降溫還是很明顯。
地面東北季風南下後,開始抬升台灣附近的暖空氣,
然而,
南方副高已經不是省油的燈,由於南海副高目前重新增強,
因此明天南下的冷鋒只剩下東北季風的地形雨,
中南部山區就看東北季風減弱後,東北風的背風低壓是否可配合熱對流降雨。
週四以後另一波西風槽再壓下,
南海副高減弱南退,並且準備銜接南亞副高分裂東移,
與分裂東移的南亞副高單體結合後,
一週尾聲,
南海副高又增強了。@@
同時部分模式也預報了,一週尾聲遠方的西北太平洋高壓崛起了。
太平洋高壓也要來了嗎。@@
往年4月是太平洋高壓崛起後與南亞副高(此時孟加拉灣西南季風尚未爆發)連結,
因此4月是太平洋高壓勢力範圍最大的時節。(4月最大,8月最強)
不過,對需要水的台灣,就是久旱偏逢連高壓,
如果4月春雨再不明顯,
就只能等5月梅雨和南海西南季風爆發。
(以上供參囉)
--
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