Application of the WRF Double-Moment Six Class Microphysics Scheme for Tropical Convection within the Model for Prediction Across Scales.

This study aimed to enhance precipitation forecasting accuracy within the Model for Prediction Across Scales (MPAS) framework. This was achieved by integrating the double-moment 6-class (WDM6) microphysics scheme from the Weather Research and Forecasting (WRF) model. The objective was to examine two distinct weather occurrences: 1 - a squall line that moved eastward across the Eastern Caribbean from November 28th to 30th, 2016, and 2 - a mesoscale convective complex (MCC) that influenced Barbados on June 17th, 2021. To accomplish this, the study conducted a comparative analysis of simulation outcomes for both events using three different microphysics schemes: WDM6, WRF single-moment 6-class (WSM6), and the Thompson microphysics scheme. Preliminary findings from the study indicate that the simulation outcomes using the WDM6 microphysics scheme were more aligned with observed data in terms of both the intensity and spatial distribution of precipitation. This suggests that incorporating the WDM6 microphysics scheme into the MPAS framework led to improved accuracy in simulating these specific weather events. This study sheds light on the benefits of using advanced microphysics schemes, like WDM6, in enhancing weather simulations within the MPAS framework. The observed improvements in precipitation simulation underscore the potential for more accurate representation of complex weather phenomena, contributing to better forecasting and understanding of weather events.