Excessive boundary-layer cloudiness has been a problem within the Coupled Hydrosphere-Atmosphere Research Model (CHARM), a model of the Great Lakes' regional climate system that uses the Regional Atmospheric Modeling System (RAMS) as the basis for its atmospheric component. Some of this problem stems from continued land surface evapotranspiration following the formation of fog. An altered formulation of evapotranspiration in the presence of fog helps to abate the resulting temperature and precipitation biases. Various configurations of vertical resolution are also tested for their effect on stratus cloud cover, and hence radiation, over long terms