Description of "ARW" WRF-EMS Model at RNK
The model is currently run on a cluster of 4 dual "quad core" (8 CPU each) 64 bit Linux workstations (2.33 GHZ). Total system memory is 16GB. A total of 19 CPUs are being utilized for model processing.
Post processing is completed on one of the quad core Linux workstations for display of model information on AWIPS, as well as posting to the web in gempak format.
The current model configuration is listed below in detail. We are running a 4km domain stretching from just south of the Great Lakes in the northwest corner to just off the coast of southeast North Carolina, utilizing the RUC13 analysis (hybrid vertical coordinates) for the initialization (we recently switched from using the LAPS analysis), with boundary conditions provided by NAM (12km) short range forecasts. The model is NOT utilizing a cumulus parameterization scheme, so produces convection explicitly. It also uses high resolution and frequently updated land surface soil temperature/moisture and sea surface temperature data provided by the NASA SPoRT group in Huntsville, AL (http://weather.msfc.nasa.gov/sport/)
General Model Settings (These may vary at times):
Model Computational Domain Information WRF Core : Advanced Research WRF (ARW) Number of Domains : 1 Upper left corner : 42.65N, 89.81W Lower right corner : 33.01N, 77.03W Grid Dimensions : 280x270 Grid Spacing : 4.0 km Map Projection : Lambert conformal Timestep : 60 seconds Vertical ETAP Levels : 31 Pressure at Model Top : 50 mb WRF Run Dynamics Configuration Model Dynamics : Non Hydrostatic Time Integration : Runge-Kutta 3rd Order Turbulence and Mixing Option : Simple diffusion WRF Run Physics Configuration Cumulus Scheme : None Microphysics Scheme : Lin et al. Scheme Boundary Layer Scheme : Yonsei University Scheme Land-Surface Scheme : Noah 4-Layer Land Surface Model Number of Soil Layers : 4 Source of Landuse and Soil Data : Standard Initialization (SI) Surface Layer Scheme : Monin-Obukhov Scheme Include Surface Fluxes : Yes Long Wave Radiation : Rapid Radiative Transfer Model (RRTM) Short Wave Radiation : Dudhia Scheme Radiation Timestep : Auto Minutes Include Cloud Effects : Yes