天氣概況~2011/06/13
隨著時間來到6月中旬~在梅雨遠離台灣後~緊接著就進入了比較單純的夏季天氣型態~
昨天如預期是一個午後山區有熱對流發展的天氣型態~
中北部山區的熱對流發展較明顯~平地的部份則是以宜蘭的降雨較多~
今天開始一連大概有5~6天的時間都是這種典型的夏季天氣~
上午多雲到晴~午後山區有熱對流發展並且往平地擴散~
高壓稍強一點時降雨會少一點~高壓弱一點時則會多一些~
目前看起來今天到明天午後降雨會比較多~週三到週五會比較少~
由於台灣主要還是位於高壓北側的關係~風向以偏南到西南風為主~
因此熱對流擴散的方向都是往中北部到東北部東部的平地擴散~
中部以南平地受到影響的範圍比較有限~
不過還是提醒大家午後外出最好都能攜帶雨具~
熱對流發展常常都有可能會超乎預期~並不能良好的預測跟掌握~
前往山區或溪流邊活動時務必要多留意午後天氣的變化~
因為吹西南風的關係~所以南部地區仍要注意海面上的小範圍雲層是否移入~
夜晚到清晨在西南部沿海的海陸風環流也可能造成小範圍的局部輻合降雨現象~
不過這種變化應該都是很局部的~影響有限~
溫度方面持續高溫悶熱~溫度高點普遍可能達到33~35度~
只有午後下點雨才能消暑~不然一直到晚間都還是很悶熱的~
特別是在都市裡面~熱島效應很可能讓高溫維持到深夜以後~
外出時防曬的準備不可少~現在的紫外線指數動輒可達危險等級~
曬個10~15分鐘就有曬傷的可能~
要有明顯的天氣變化可能要等到颱風或熱帶擾動靠近才會發生~
目前從中南半島經南海~菲律賓到關島附近都是季風槽的區域~
其中一個發展較好的擾動渦漩94W即將進入南海南部~未來有發展的機會~
另外也要注意延伸到菲律賓東南方海面的季風槽東端區域~
不排除會有另外的擾動渦漩發展起來~
未來幾天這些南方季風槽中的擾動變化都很值得留意~
以上先簡單供參考囉~
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