A primary objective of WFIP2 is to improve the physical and dynamical schemes used in operational forecast models, specifically NOAA's Rapid Refresh (RAP) and High-Resolution Rapid Refresh (HRRR). Model components and capabilities under development include the boundary-layer, surface-layer, and cloud parameterization schemes. Full “scale-aware” functionality within the boundary-layer and cloud parameterizations will also be developed, thereby making the RAP/HRRR physics suite well suited for a range of applications by the modeling community, regardless of grid spacing.
An overview of the model development plans and strategy will be presented. New model physics are tested at 13-km (RAP), 3-km (HRRR), and 0.75-km grid spacing, allowing for the validation of scale-aware functionality as well as the fidelity of model dynamics over steep topography. Preliminary model results incorporating next-generation RAP/HRRR physics, compared against WFIP2 in-situ observations, will be presented for selected cases that are deemed important for wind energy forecasting.