Hi Helin, > Do you know if there is any program to convert Netcdf to Grib? > I want to use CCM3 output to drive MM5, and MM5 pre-processor can only > handle Grib data. Thanks. You may be able to use the Lats4D software, available from http://dao.gsfc.nasa.gov/software/grads/lats4d/ to convert netCDF to GRIB. To use this, you have to first install the GrADS software, since Lats4D is a GrADS script. --Russ _____________________________________________________________________ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu