Status: gribw library for grib-1 only in operational use at NCEP and used at other places I use it daily documentation is for good C programers who know GRIB-1 the documentation is limited OTOH non-C programs with limited GRIB experience have modified existing example code gribw utility for grib-1 only some people use it routinely but I consider it a failed experiment I haven't used it for years so I don't support it anymore.