The ECMWF GRIB API is an application program interface accessible from C,
FORTRAN and Python programs developed for encoding and decoding WMO FM-92 GRIB
edition 1 and edition 2 messages. A useful set of command line tools is also
provided to give quick access to GRIB messages.

WWW: https://software.ecmwf.int/wiki/display/GRIB/Home