變換莫測低壓帶~2015/07/20
今天上午台灣上空的降雨減小許多,看起來主要跟廣東沿海的低壓系統變化有關。
經過一番調整,廣東海面的低壓環流慢慢在海南島以東,
接近粵西沿岸處整理出一個比較清楚的環流中心,
跟先前不斷變動的不穩定中心不同,這一個看起來完整許多,
中國氣象局(CMA)也在中午時將它訂為一個熱帶性低氣壓(T.D)。
受到這個低壓環流的引導,今天上午比較強的氣流明顯往西偏到了福建、廣東沿海一帶,
雨勢相當大,相對來說,台灣僅位於強風區的邊緣,而且風向比較順地形,
因此降雨跟昨天相比減少許多。
接下來的降雨狀況仍要看這個低壓環流的變化,
預估它很快會進入大陸,西南氣流強風區應該會更往北進入大陸東南部,
如果位置仍偏西,對台灣的影響就會比較小,
但還是要密切觀察強風區是否往東延伸調整,這會影響到未來2天台灣的降雨多寡程度,
變動很大,仍請大家要密切留意,並且隨時做好準備。
以上簡單供參考囉~
http://i.imgur.com/gIIjwXg.jpg
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