The Medium-range Forecasting Efficiency and Verificantion of T63 NWP in the Summer 1995

In order to understand the performance of T63 NWP and the efficiency of its products,the assessments and synoptic verifications are made for main rain-producing systems and circulation in the summer of 1995. The results show that forecasts by T63 model have significant improvements compared with that by T42. The 96-hours、 120-hours、 144-hours and 168-hours predictions by T63 model are considerably reliable for the motion of atmospheric long wave and extra-long wave. The forecast on tendence of large-scale circulation's evolution becomes better. They are considered to be valuable for the medium-range forecast. The forecasts by T63 model are better than that by T42 for the westerly system and subtropical high. It provides useful information for the medium-range forecast.

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