Back to Table of Contents WHY CANT I FIND THE RADAR PRODUCTS IN MY AWIP12 GRIB OUTPUT FILE?
Assuming you are using the nam.tHHz.awip12FF.tm00 files at ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/nam/prod/nam.YYYYMMDD/ where HH is the cycle time = 00, 06, 12 or 18, FF is the forecast hour = 00, 01, 02 … 24 and YYYYMMDD is year, month & day; you are probably not seeing them because the new radar reflectivity fields are defined in NCEP GRIB parameter table version #129 (http://www.nco.ncep.noaa.gov/pmb/docs/on388/table2.html#TABLE129), and you are expecting them to be defined in the normal/default Table #2 (http://www.nco.ncep.noaa.gov/pmb/docs/on388/table2.html). We had to put them in this alternative table because Table 2 had no room for new parameters to be added. According to the GRIB documentation (see http://www.nco.ncep.noaa.gov/pmb/docs/on388/section1.html) you can find which Parameter Table is being used in octet 4 of the GRIB PDS (Product Definition Section). Looking at an inventory of the nam.t12z.awip1212.tm00 file found in ftp://ftpprd.ncep.noaa.gov/pub/data/nccf
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