Currently, the Weather Research and Forecasting Non-hydrostatic Mesoscale Model (WRF-NMM) model system serves as the dynamical core of the NAM model. The WRF replaced the Eta model on June 13, 2006.
At present, the WRF-NMM serves as the central component of the NAM forecasting system. The WRF assumed control from the Eta model on June 13, 2006.