. Development of Regional FV3 with CCPP Advanced Physics

Abstract
In this poster we present the development of the regional FV3 (Finite-Volume Cubed-Sphere Dynamical Core) with advanced physics contained in the CCPP (Common Community Physics Package). FV3 has been chosen as the atmospheric dynamical core for NOAA's Unified Forecast System (UFS) and is now being tested at various scales and configurations, ranging from short-term convective weather to seasonal coupled applications. It is expected that a FV3-based configuration will be used in the next GFS (Global Forecast System) upgrade planned for 2019. The CCPP is designed to facilitate the implementation of physics innovations in state-of-the-art atmospheric models, the use of various models to develop physics, and the acceleration of transition of physics innovations to operational NOAA models. Following a presentation of the overall software architecture of the FV3-SAR (Stand Alone Regional) and its connection with CCPP, the impact of different combinations of the cloud microphysics and PBL schemes on weather forecasts are investigated through a case study of Hurricane Irma, focusing on temperature, humidity, radiation, wind fields, precipitation, as well as hurricane track and intensity. The statistics of the system performance of different combinations are evaluated with traditional verification metrics including bias, root mean square error (RMSE), mean absolute error (MAE), and the correlation between observation and model outputs.