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About WRF |
| The Weather Research and Forecast Model (WRF) project is developing a next generation mesoscale forecast model and assimilation system that will advance both the understanding and prediction of mesoscale precipitation systems. The model incorporates advanced numerics to solve the governing equations, advanced data assimilation techniques, a relocatable multiple grid nesting capability and improved physics particularly for the treatment of convection and mesoscale precipitation. It is intended for a wide range of applications, from idealized research to operational forecasting, with a priority emphasis on horizontal grids of 1-10 km. Current numerical prediction models predominantly use a single physics package and a single numerical scheme; no options are available within the model. The WRF physics package is intended to be plug compatible to allow easy exchange of physics packages with other models. At least one representative package for each of physical processes necessary for mesoscale forecasts is included. The WRF design also allows for multiple numerical discretization schemes to solve the governing equations. The numerical scheme in the first release is an explicit scheme requiring a small time step for computational stability and hence more computational resources. Semi-implicit numerical schemes that allow for a larger time step will eventually be implemented. |