WRF-NMM Users Page

WRF Post Processor Software Package

Funding to maintain WRF-NMM at the DTC has ended and support will no longer be provided. To download HWRF, please see: www.dtcenter.org/HurrWRF/users. To download WRF-ARW, please see: www2.mmm.ucar.edu/wrf/users . To download NEMS-NMMB, please see: www.dtcenter.org/nems_nmmb/users.To download UPP, please see: www.dtcenter.org/upp/users.

WRF Post Processor Overview

Please note: No new updates will be provided for the WRF Post Processor software package and support is being phased out. Please migrate to the replacement package - Unified Post Processor (UPP).

The NCEP WRF Postprocessor was designed to interpolate both WRF-NMM and WRF-ARW output from their native grids to National Weather Service (NWS) standard levels (pressure, height, etc.) and standard output grids (AWIPS, Lambert Conformal, polar-stereographic, etc.) in NWS and World Meteorological Organization (WMO) GRIB format. This package also provides an option to output fields on the model's native vertical levels.



The GEMPAK utility nagrib is able to decode GRIB files. Hence, GEMPAK is able to decode GRIB files generated by the WRF Post-Processing package and plot horizontal fields or vertical cross sections. GEMPAK has an online users guide at http://www.unidata.ucar.edu/software/gempak/tutorial/layout5.html

A sample script named run_wrfpostandgempak, which is included in the scripts/ directory, can be used to run wrfpost, copygb, and plot some fields using GEMPAK. This script can be modified to customize fields for output.


The GrADS utilities Grib2ctl.pl and Gribmap are able to decode GRIB. These utilities and instructions on how to use them to generate GrADS control files are available from http://www.cpc.ncep.noaa.gov/products/wesley/grib2ctl.html. The GrADS package is available from http://grads.iges.org/grads/grads.html. GrADS has an online Users' Guide at http://grads.iges.org/grads/gadoc/. A list of basic commands for GrADS can be found at http://www.iges.org/grads/gadoc/commandsatt.html.

A sample script named run_wrfpostandgrads, which is included in the scripts/ directory, can be used to run wrfpost, copygb, and plot some fields using GrADS.