Jennifer, There is a netcdf-java program that converts Grib to netCDf and one to convert gempak to netCDF. The Grib to netCDF information is located at: http://www.unidata.ucar.edu/software/decoders/grib/grib2netcdf Here's a support message about how to convert gempak to netCDF; http://www.unidata.ucar.edu/support/help/MailArchives/gempak/msg05649.html Here's a support message about Gempak netCDF process. This is probably the most difficult process. http://www.unidata.ucar.edu/support/help/MailArchives/gempak/msg05305.html Note the the Gempak code support will be terminated in the near future, so I would suggest using one of the first 2 options. Robb... Ticket Details =================== Ticket ID: RSH-294708 Department: Support netCDF Decoders Priority: Normal Status: Open