Basics: Metgrid

The purpose of METGRID is to horizontally interpolate the meteorological data onto your model domain.
Output from metgrid.exe is used as input to WRF.

The simulation domain(s) are defined using information specified by the user in the "share" and "metgrid" sections of the WPS namelist. For detailed descriptions of the namelist.wps variables, in addition to suggestions for best practices, see our Best Practice WPS Namelist page.

 

STEPS to Run METGRID

**Note: This is just a brief description of the basic steps - meant to help you understand the process. If you currently have no data, or simulation you would like to run, you can wait until you get to the 'case studies' section, later, to try to follow along.

1. Edit the &share and &metgrid sections of the namelist.wps file.
2. Input to METGRID is the geo_em.dxx.nc output files from GEOGRID, and
    the intermediate output files from UNGRIB (e.g., FILE:YYYY-MM-DD_hh).
3.Run metgrid.exe
      ./metgrid.exe

   Output from this program will be:
    - met_em.d0X.YYYY-MM-DD_hh:00:00.nc - one file for per time, for each domain ("d0X" represents the domain).

Basics – WRF