Installing wgrib2 on Ubuntu - greencoder/gfstext GitHub Wiki

This was much easier than trying to install on macOS:

wget ftp://ftp.cpc.ncep.noaa.gov/wd51we/wgrib2/wgrib2.tgz
tar -xvf wgrib2.tgz
cd grib2
make
sudo cp wgrib2/wgrib2 /usr/local/bin/
cd ..
rm -rf grib2