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Hi again Carlos, I have it on expert authority that: The grib2 version of data always labels the grids #000 as that is the designation in the data that the grid is self describing. There is no provision in grib2 for both a grid number and a section 3 definition (unlike grib1). So, Carlos will have to use #000, or wildcard that section. At the bottom of the CONDUIT web page: http://www.unidata.ucar.edu/data/conduit/ldm_idd/gfs_files.html is: LDM patterns for selected processing ... # Pipe all GFS Grid #002/#003 to decoder (note includes new NCEP file NAMES) CONDUIT (ST.opnl/MT.gfs|prod/gfs.*pgrb[^2]) PIPE decoder ... You should follow this example to process the grid 3 grids. Cheers, Tom **************************************************************************** Unidata User Support UCAR Unidata Program (303) 497-8642 P.O. Box 3000 address@hidden Boulder, CO 80307 ---------------------------------------------------------------------------- Unidata HomePage http://www.unidata.ucar.edu **************************************************************************** Ticket Details =================== Ticket ID: UDU-273265 Department: Support CONDUIT Priority: Normal Status: Closed