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Evaluation of global medium range forecast system of T511L60

GAN Shaohua,SHAN Junhui,GUO Weidong(Meteorological Center of the Air Force,Beijing 100843,China)  
To study the characteristics of the global medium range forecast system of T511L60 operating,standardized statistics methods recommended by World Meteorological Organization(WMO) were conducted using the forecast data from May 2008 to May 2010 in the paper.The verification results of 500 hPa height show the nearly seven days valuable forecast time over the North Hemisphere and between six and seven days valuable forecast time over Asia.Rain verifications show that the T511L60 system has better performance in the threat score and forecast bias than Japan model over China in the five day slight rain forecast.Results also show that the same performance or better performance in the heavy rain and storm rain but lower performance in the moderate rain compared with the Japan model.
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