National Weather Service United States Department of Commerce

 

The National Weather Service in Charleston is currently running three domain configurations of the NOAA/NWS Science and Training Resource Center (STRC) Environmental Modeling System (EMS). EMS is a complete, full-physics, state-of-the-science numerical weather prediction (NWP) package that incorporates dynamical cores from both the National Center for Atmospheric Research (NCAR) Advanced Research WRF (ARW) and the National Center for Environmental Predictions' (NCEP) non-hydrostatic mesoscale model (NMM) releases into a single end-to-end forecasting system. The EMS Package allows for a wide range of configuration, physics, micro-physics, and parameterization schemes. Below is a general description of how the models are configured to run at the National Weather Service in Charleston. Each of the models run at 3 hour intervals out to 24 hours. Each model domain is initialized using the Earth System Laboratory's Rapid Refresh Model (RAP). The models have their boundaries initialized using the NCEP Global Forecast System (GFS) Model.

Description of the 15KM WRF-ARW

Domain & Run Information for the 15KM WRF-ARW:
       Primary Time Step         :  75 Seconds
       Grid dimensions (NX x NY) :  120 x 120
       Vertical Layers (NZ)      :  45
       Grid Spacing              :  15 km

     Model Physics                  
       Dynamics                  :  Non-Hydrostatic               
       Cumulus Scheme            :  Kain-Fritsch
       Microphysics Scheme       :  New Thompson Graupel
       PBL Scheme                :  Yonsei University

Description of the 5KM WRF-ARW

Domain & Run Information for the 5KM WRF-ARW
       Primary Time Step         :  25 Seconds
       Grid dimensions (NX x NY) :  155 x 155
       Vertical Layers (NZ)      :  45
       Grid Spacing              :  5 km
         
     Model Physics
       Dynamics                  :  Non-Hydrostatic
       Cumulus Scheme            :  Grell 3D Ensemble
       Microphysics Scheme       :  New Thompson Graupel
       PBL Scheme                :  Yonsei University

Description of the WRF-NMM

Domain & Run Information for the 12KM WRF-NMM
       Primary Time Step         :  25 Seconds
       Grid dimensions (NX x NY) :  176 x 330
       Vertical Layers (NZ)      :  40
       Grid Spacing              :  12 km
                  
     Model Physics
       Dynamics                  :  Non-Hydrostatic
       Cumulus Scheme            :  Kain-Fritsch
       Microphysics Scheme       :  Ferrier Microphysics
       PBL Scheme                :  Mellor-Yamada-Janjic