颱風外圍逼近,明起天氣漸轉變~2014/09/13
海鷗颱風過去一天大致如預期的沿著高壓邊緣向西到西北西方向移動,
強度也在不錯的大氣環境以及海溫支持下逐漸加強,
但是應該有朋友發現,它的速度並不快,這顯示雖然高壓的確是東西向擋在颱風北側,
但是引導的力量不是那麼的強大,所以颱風走的速度是稍微比較慢的情況。
呂宋島西側目前還沒有看到低層正渦度區域出現,這個也顯示環境東風並不是很明顯,
特別是在中低層的部分,相較之下,中高層的東風就比較顯著一些,
這種情況反應的結果就是,颱風強度越強,發展層面越高,受到東風的引導反而會越強,
速度可能加快,並且繼續沿著高壓邊緣西進,
目前模式預報以及各家氣象單位的預測也大致都反應這種結果。
對台灣來說,海鷗仍不具有直接的威脅,但是隨著颱風靠近呂宋島,
明天周日它的外圍環流就會逐漸影響東半部以及恆春半島的天氣,
時間越晚,天氣可能變化越明顯,逐漸轉為有短暫陣雨的天氣,
部分地區明晚以後將有出現較大雨勢的機會,請東半部以及恆春半島的朋友要多加注意。
雙北市明晚開始也會有出短暫陣雨的機會,
中部、南部明天的天氣大致仍不受影響,
山區有局部午後雷雨,不過降雨的情況應該不會很明顯,
平地則是以多雲到晴的天氣為主。
隨著風向轉東,北部地區明天可能有地形強陣風發生,恆春半島的風勢也會加強,
海峽逐漸吹起北風後,沿海地區也可能有較大陣風出現的機會,
台灣東半部、北部以及恆春半島沿海要留意浪逐漸加大的情況,
前往海邊活動務必注意安全。
以上簡單供參考囉
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