為何CWB預測8/30降雨機率不是100% - 颱風討論

By Kelly
at 2015-08-30T01:12
at 2015-08-30T01:12
Table of Contents
這幾天台灣受西南氣流影響,每天都下雨,
當然這是看到的結果。不過就預測而言,
至少8/30(日)白天降雨機率仍是相當高,
個人不敢預測100%,只能用直覺認為至少有數個縣市是100%。
不過CWB預測認為,8/30(日)白天全台沒任何縣市下雨機率100%。
http://i.imgur.com/OecnRLC.jpg
對於這點相當好奇,依此趨勢,CWB何以在西南氣流/季風期間,
不會預測西岸某縣市降雨機率100%呢?
10-30%不會降雨的可能性,是依據數值模擬,還是經驗或統計資料呢? @@
補充再請教個問題,
除了明顯/明確預測颱風走向將帶來降雨外,
大概還有哪些情況下,CWB才會預測降雨機率為100%呢?
--
當然這是看到的結果。不過就預測而言,
至少8/30(日)白天降雨機率仍是相當高,
個人不敢預測100%,只能用直覺認為至少有數個縣市是100%。
不過CWB預測認為,8/30(日)白天全台沒任何縣市下雨機率100%。
http://i.imgur.com/OecnRLC.jpg

對於這點相當好奇,依此趨勢,CWB何以在西南氣流/季風期間,
不會預測西岸某縣市降雨機率100%呢?
10-30%不會降雨的可能性,是依據數值模擬,還是經驗或統計資料呢? @@
補充再請教個問題,
除了明顯/明確預測颱風走向將帶來降雨外,
大概還有哪些情況下,CWB才會預測降雨機率為100%呢?
--
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