James T. Frimel authored and/or contributed to the following articles/publications.
In order for NWP models to forecast tropical cyclone structure, size and intensity changes with fidelity, the inner core structure of these storms must be resolved at 1-3 km horizontal grid spacing. Currently, the NWS relies on both coarse-scale global models and regional scale higher resolution models to provide numerical guidance for tropical ...
The Developmental Testbed Center (DTC) tested two convective parameterization schemes in the Hurricane Weather Research and Forecasting (HWRF) Model and compared them in terms of performance of forecasting tropical cyclones (TCs). Several TC forecasts were conducted with the scale-aware Simplified Arakawa Schubert (SAS) and Grell–Freitas (GF) co...Institutions National Center for Atmospheric Research - NCAR National Oceanic and Atmospheric Administration - NOAA
Lack of spread is a common deficiency in ensemble models and results in over-confident and inaccurate forecasts. A number of options exist to increase the spread of an ensemble, including the use of multiple physics parameterizations or dynamic cores. However, implementation of these options can be cumbersome, costly, and suffer from certain t...Institution National Center for Atmospheric Research - NCAR