The Regional Atmospheric Modeling System (RAMS) was used to simulate the synoptic weather conditions of the Elmwood storm. The simulation was initialized and nudged using the Rapid Update Cycle (RUC) product of the Mesoscale Analysis and Prediction System (MAPS). Surface station reports were also incorporated into the initialization. The model uses mixed-phase bulk microphysics and represents surface exchange processes using the Land Ecosystem Atmosphere Feedback model, version 2 (LEAF-2). Longwave and shortwave radiative transfer incorporates the effects of water condensate and exchanges between vegetation and canopy air. Further simulations are performed with nested grids introduced into the synoptic-scale grid to capture the evolution of individual supercells. These are compared to simulations performed in horizontal-homogeneous environments, based on both model and VORTEX-derived soundings in the vicinity of the Elmwood storm. The influence of environmental heterogeneity on the evolution of the storms is examined.