Development of Multiple-Nest Capability in the Operational Global Forecast System

The FV3 dynamic core, developed originally at the Geophysical Fluid Dynamics Laboratory (GFDL), was coupled to the global forecast system’s physics suite at National Centers for Environmental Prediction (NCEP) and GFDL's microphysics within the Next-Generation Global Prediction System program. It has evolved to a unified earth system model for NOAA’s operations, i.e. FV3GFS. AOML, in partnership with GFDL and EMC, have further advanced the FV3GFS by implementing the multiple-nest capacity within the global model. We will demonstrate how this capacity has the potential to improve 5-7-days of hurricane forecasting especially when there are multiple storms in the globe. The new capacity forms the baseline for multiple-moving nests under development within the next-generation hurricane analysis and forecast system (HAFS).