RAMS is a merging of basically three models that were designed to simulate different atmospheric circulations. These were a non-hydrostatic cloud model (Tripoli and Cotton, 1982) and two hydrostatic mesoscale models (Tremback et al., 1985 and Mahrer and Pielke, 1977). The capability of RAMS was recently augmented with the implementation of 2-way interactive grid nesting. Because of this, the modelling system contains many options for various physical and numerical processes. These options are listed below.

The following options are currently available in configuring a model: