git clone https://github.com/wrf-model/WPS      # Version 4.40 at the time

For older version, check the WPS stable branches on the GitHub repository and its official website.

export WRF_EM_CORE=1    # Explicitly select ARW core developed by NCAR 
export WRF_NMM_CORE=0   # Not NMM core
export WRF_DA_CORE=0    # Not WRFDA
export WRF_CHEM=0       # Not WRF-Chem

export NETCDF=${EBROOTNETCDFMINFORTRAN:-${EBROOTNETCDF}} # Required
export HDF5=${EBROOTHDF5}                                # To enable HDF5 (Recommend)
export JASPERINC=$EBROOTJASPER/include                   # For GRIB2 IO (Recommend)
export JASPERLIB=$EBROOTJASPER/lib                       # For GRIB2 IO (Recommend)
export WRFIO_NCD_LARGE_FILE_SUPPORT=1                    # Enable large file support (Recommend)