JTWC????? - 颱風討論
By Emma
at 2018-10-02T04:05
at 2018-10-02T04:05
Table of Contents
不囉唆,上圖
http://i.imgur.com/WcjfBJ3.jpg

10010927Z
PGTW T7.5 CI6.5
http://i.imgur.com/mYhAzwO.jpg

10011215Z
PGTW T7.5 CI6.5
JTWC:125knots 933mb
http://i.imgur.com/M5ZAqUR.jpg

10011500Z
PGTW T7.5 CI7.0
http://i.imgur.com/jZQC75y.jpg

10011800Z
PGTW T7.0 CI7.0
JTWC:135knots 922mb
兩個點:
1.死守德法的滯後性
給強度時大可忽略德法的限制直接給強度。
因為德法的滯後性主要是建立在全年所有颱
風的觀測平均值上,對於RI這種小樣本會被
平均掉。因此德法滯後對於RI颱風是很不適
用的。甚至WMO都提過為了更精準的數據鼓
勵有進行颱風預報的機構去突破限制。
JTWC過去也不是沒做過這種事,難以理解
這次死抱著滯後不放的點在哪裡。
2.莫名其妙的對應強度
你說今天預報員保守點不去挑戰德法,好,
可以理解。但這對應強度是啥鬼?
一個已經擁有CMG+WMG,連續兩報受限於
滯後只能給CI6.5的颱風,給125kts??????
一個上一報CMG+WMG,這一報W+WMG但
CMG環接近合格,受限於滯後連續兩報CI7.0
的颱風,給135kts?????
CI6.5可以對應130kts CI7.0可以對應145kts
尤其這個颱風PGTW/KNES/RJTD/SATCON
四種JTWC的分析法全部支持140+
結果給135?????
這個強度給145kts都嫌少了,給135是來搞笑?
沒想到都2018了,12年過去了,還能看到西
馬隆慘案重演
真的是一肚子火欸…
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Sent from JPTT on my Sony G8142.
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Tags:
颱風
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