NASA GHCC Weather Forecast System - WRF Model

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Real-time mesoscale model forecasts using the Weather Research and Forecast (WRF) model are being produced out to 48 hours twice each day at the NASA Short-term Prediction Research and Transition (SPoRT) Center. The current model configuration employs a 36 km domain that covers the continental United States and a 12 km nest over the Southeast. Web products from the first 12 h of a forecast are typically available at 11:00 am ( 11:00 pm) CDT for the 6:00 am ( 6:00 pm). Specific details on the model configuration are provided in the table below. Version 2.0.3.1 Dynamic core NCAR Eulerian Mass Horizontal grid size CONUS: 118 x 95 SE NEST: 121 x 121 Vertical levels 37 Horizontal grid resolution CONUS: 36 km SE NEST: 12 km Model top 100 kPa Initial and lateral boundary conditions NCEP Eta AWPS 212 grid Computational platform Linux Intel P3 Cluster (38 procs) Simulation length 48 hours Simulation run time 1 hour 37 minutes Time step CONUS: 225 seconds SE NEST: 75 seconds Cumulus parameterization Kain-Fritsch (New Eta) Scheme Cloud microphysics Lin et al. Scheme Shortwave radiation Dudhia Scheme Longwave radiation RRTM Scheme Land surface physics Noah Land-Surface Model PBL physics YSU scheme

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