天氣速觀:西南風減弱,太平洋高壓開始西伸,南部終於受梅雨鋒面的雷暴群影響 - 颱風討論

By Liam
at 2017-06-04T07:10
at 2017-06-04T07:10
Table of Contents
天氣速觀:西南風減弱,太平洋高壓開始西伸,南部終於受梅雨鋒面的雷暴群影響
昨晚起,出現兩件事,
大尺度西南風開始減弱,
以及小尺度因北部午後的降雨偏強,
造成入夜後,北部的冷空氣造成北部海平面氣壓梯度升高,
加上西南風減弱,終於使的原本略微北抬的颮線再度南移,
雷暴群往南部,掠過南高屏,
南高屏首度受到梅雨鋒面的颮線,尤其平地終於出現明顯降雨。
事實上,這種梅雨鋒面滯留時,日夜變化造成的漂移總是最難預測的。
不過也還好因為西南風的減弱,昨晚的降雨量比起前兩天減少,
這種西南季風減弱的原因,正是太平洋高壓的手伸進來了。
今天高壓的伸手動作,會促發低空噴流的加強,西半部還是要留意降雨。
模式預報,700帕氣流已經開始往北拱起,
梅雨鋒面今起會真正的北移,日夜變化的漂移可以忽略了,
今天受到太平洋高壓開始向台灣伸手的影響,
模式預報,台灣上空的低空噴流會一度加強,
因此,西南季風+鋒面還會有一波明顯降雨,以台灣西半部為主,
北部要留意的是,由於目前梅雨鋒面北抬,加上低空噴流加強,
模式預報北部沿海會有強烈對流系統出現。
如果又影響到北海岸,就會造成一波強勁豪大雨。
不過最新模式預報認為,太平洋高壓之手伸得很快,
24小時內,鋒面北抬的位置會到達北部外海,
不過,
仍要看東部外海的地面氣旋波出現的位置而定,
(一波加強的低空噴流,使西南風和東北風輻合後生成氣旋波)
如果氣旋出現的的位置偏向台灣東部,
那氣流輻合的區域就容易落在基隆北海岸,也就是強降雨區。
因此,今天西半部的低空噴流還有一波引爆降雨,
基隆北海岸要留意氣旋波生成的氣流輻合。
一切都是太平洋高壓之手,迫不及待了。
(快速說說,以上供參囉)
--
昨晚起,出現兩件事,
大尺度西南風開始減弱,
以及小尺度因北部午後的降雨偏強,
造成入夜後,北部的冷空氣造成北部海平面氣壓梯度升高,
加上西南風減弱,終於使的原本略微北抬的颮線再度南移,
雷暴群往南部,掠過南高屏,
南高屏首度受到梅雨鋒面的颮線,尤其平地終於出現明顯降雨。
事實上,這種梅雨鋒面滯留時,日夜變化造成的漂移總是最難預測的。
不過也還好因為西南風的減弱,昨晚的降雨量比起前兩天減少,
這種西南季風減弱的原因,正是太平洋高壓的手伸進來了。
今天高壓的伸手動作,會促發低空噴流的加強,西半部還是要留意降雨。
模式預報,700帕氣流已經開始往北拱起,
梅雨鋒面今起會真正的北移,日夜變化的漂移可以忽略了,
今天受到太平洋高壓開始向台灣伸手的影響,
模式預報,台灣上空的低空噴流會一度加強,
因此,西南季風+鋒面還會有一波明顯降雨,以台灣西半部為主,
北部要留意的是,由於目前梅雨鋒面北抬,加上低空噴流加強,
模式預報北部沿海會有強烈對流系統出現。
如果又影響到北海岸,就會造成一波強勁豪大雨。
不過最新模式預報認為,太平洋高壓之手伸得很快,
24小時內,鋒面北抬的位置會到達北部外海,
不過,
仍要看東部外海的地面氣旋波出現的位置而定,
(一波加強的低空噴流,使西南風和東北風輻合後生成氣旋波)
如果氣旋出現的的位置偏向台灣東部,
那氣流輻合的區域就容易落在基隆北海岸,也就是強降雨區。
因此,今天西半部的低空噴流還有一波引爆降雨,
基隆北海岸要留意氣旋波生成的氣流輻合。
一切都是太平洋高壓之手,迫不及待了。
(快速說說,以上供參囉)
--
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