The Hydrometeorological Prediction Center (HPC) has a broad mission that includes providing the nation expertise in heavy precipitation, winter weather, and medium range forecasting. The Hydrometeorology Testbed–HPC was established in 2004 to support the transfer of research results into HPC operations and stimulate forecast improvements. Over the past two years the testbed has established the quantitative precipitation forecasting (QPF) component of the annual Hazardous Weather Testbed Spring Experiment and the HMT-HPC Winter Weather Experiment. Both experiments are built on active collaborations with academics, government lab scientists, and operational forecasters throughout the weather enterprise to explore uses of high-resolution and ensemble model guidance in a near real-time forecasting environment. This unique synergy provides a practical research-to-operations and operations-to-research environment that is difficult to simulate elsewhere. A particularly close partnership with the NCEP/Environmental Modeling Center has been established, which has positively impacted model development as well as educated experiment participants. An overview of the Spring and Winter Weather Experiments and their key results will be shown, with particular emphasis on the tangible transition successes and practical challenges.