Thursday, 16 January 2020: 9:00 AM
252A (Boston Convention and Exhibition Center)
The Finite Volume Cubed Sphere (FV3) model was chosen by NCEP as the common dynamic core for the use in the proposed Unified Forecast System (UFS), a framework which will streamline the operational forecast suite across multiple predictive scales. To help realize this goal, a stand-alone regional (SAR) version of the FV3 has been developed through multi-laboratory (NSSL, GSD, EMC, and NCAR) collaboration. This configuration of the FV3 is intended to be used across scales, from hydrostatic (~13 km) to convection-allowing (~3 km) horizontal grid spacing. To test FV3 forecasts of severe weather and its antecedent environment at convection-allowing scales, we will perform controlled comparisons (using same initial and lateral boundary conditions with similar physics and domains) between the CCPP-enabled SAR-FV3 and the Advanced Research Weather Research and Forecasting (WRF-ARW) model. The initial conditions for the SAR runs will be obtained from NSSL experimental Warn-on-Forecast (WoF) domain forecasts from 2018 and 2019 using the ARW-WRF system. Our results will focus on comparisons of specific forecasts as well as on objective verification analyses.
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