Dear Praveen,

For GRIB2 format, in namelist.input, you can set io_form_history to 10.

io_form_history:

The output format in which the history file (wrfout_d0*) will be written

Available Options:

2 = netCDF (default; recommended)

1 = binary format (no supported post-processing software available)

4 = PHDF5 format (no supported post-processing software available)

5 = GRIB1 format

10 = GRIB2 format

11 = parallel netCDF format

102 = split netCDF (no supported post-processing software available)

Morteza Babaei Thank you for the answer. I have tried the above method but it still dint work.

Dear Praveen,

For using GRIB2 format, you need to install WRF with additional libraries.

See WRF user guide Chapter 3.

https://www2.mmm.ucar.edu/wrf/users/docs/user_guide_v4/contents.html

For grib format you can change compiler flag from O3 to O2 in configure.wrf also more information you can get in https://www2.mmm.ucar.edu/wrf/users/docs/user_guide_v4/contents.html