Development of a real-time wind gust product with 1-kilometre-per-hour resolution for China region

According to the applications for weather forecast, strong convection monitoring and warning services, a 1km/1h wind gust product on China region was produced by using the hour-by-hour wind gust speed observations and model forecast data, which were adopt after the procedure of quality control, space-time matching and fusion analysis. This product is updated with a 5-minute lag with the overall RMSE is 1.9 m/s for the independent test and 0.7 m/s for the non-independent test. The results indicated the error of the product tends to increase obviously with the wind speed increasing, and the accuracy decrease continuously with the number of samples decreasing, but the quality of this product improve effectively comparing to the model prediction in high speed of wind gust. Among them, the accuracy of wind speeds above magnitude 9 has improved nearly doubled (13.1%->24.8%), and the relative error has become significantly smaller (-35.8%->-26.0%). The development of this product can support in disaster prevention and decision-making in respect of catastrophic gales and typhoons.