For this evaluation, retrospective HWRF forecasts for several storms in the Atlantic and Eastern Pacific basins will be produced using variations of the 2016 operational configuration; with results compared against the operational baseline. The variations will be tested as packages of improvements including multiple individual scheme changes to partially alleviate compensatory errors, where improvements to a specific scheme may result in little to no forecast improvement due to prior tuning of another related scheme (e.g. radiation and cloud microphysics). Specifically, we will discuss results related to recommended enhancements from developers to microphysics, PBL, and radiation parameterizations. Assessment will be done through a combination of physical process diagnostics as well as traditional track and intensity verification, including statistical significance. Additionally, verification of large-scale fields and storm scale evaluation will be explored to further investigate HWRF physics sensitivities.
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