Abstract:Effective and smooth transitions from research and development to operational implementation play important parts in promoting the development of meteorological enterprise. Since 2000, the National Oceanic and Atmospheric Administration (NOAA) of the United States of America has begun to organize several test beds to implement the transitions from research and development to operations, and the test beds have become an integral part of the weather enterprise, bridging research and forecast services. This paper briefly introduces an overview of the different test beds of NOAA and their main achievements, and highlights organization and Spring Experiment of the HWT (Hazadous Weather Testbed). By forecasting experiments in severe convective weather, quantitative precipitation forecast, hurricanes, and aviation weather, we can see that developing the probabilistic forecast products of different types of severe convective weather, quantitative precipitation forecast, and the tropical storm force winds is an important development goal of the U.S. weather service. The Spring Experiment of HWT showed that high resolution “convection allowing” numerical weather prediction (NWP) models ［hereafter convection allowing models (CAMs)］ are the technical foundation for developing fine probabilistic forecasting operation, and the development of CAMs and data assimilation, testing and application of CAMs forecasts can provide objective technical support for probabilistic forecasts of severe convective weather and quantitative precipitation. The achievements and organization of GOES R (Geostationary Operational Environmental Satellite R series) Proving Ground can also provide a reference for the application of FY 4 (Fengyun 4) satellite data.