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In order to provide quantitative reference for WAFS's users, selecting the GRIB data in the areas and levels in common use in WAFS products, the numerical analysis and comparison were made of the objective analysis of wind and temperature from the National Meteorological Center and the forecast results of the WAFS (wind, temperature) at the same time in the form of the root-mean-square error (RMSE). The WAFS wind and temperature predictions are usually short-term predictions, which are closer to the objective analysis fields than long-term wind and temperature predictions. The forecasts for low levels are closer to the objective analysis fields than the forecasts for higher levels. In additional, v vector forecast with is superior to u vector, and most of the wind errors come from u vector.