Recently there has been increased interest in forecasting changes in precipitation intensity and patterns in a warming climate. However, current Global Climate Models (GCMs) do not resolve regional characteristics of precipitation.I will briefly describe the dynamical downscaling process, in which a high resolution regional model (WRF), is driven by a global climate model (CESM). In order to validate the downscaling system against observational data I will show data from so-called "hindcasts" (forecasts of historical climate) and compare to two reanalysis products (CFSR and NARR). I will conclude with some sensitivity experiments regarding the configuration of the WRF model.