"unimplemented grid type:"

a grid type needs to be added to grib2ctl, it's not hard if you know the "pdef". Send me the "pdef" and grid type, and I'll have a new grib2ctl in a few minutes. (Assuming that GrADS supports the grid type.)

gribmap complains about some files from nic.fb4.noaa.gov

some of these GRIB files have non-GRIB data before the first GRIB record. The length of the non-GRIB section is too large, some programs (gribmap) may assume that the file is not in GRIB. To trim the file, use a new version of wgrib (1.5.0+).

wgrib oldfile | wgrib oldfile -i -grib -s -o newfile
grib2ctl.pl newfile >newfile.ctl

some ngm files from nic.fb4.noaa.gov

Seen some ngm files which have data on 4 different grids. Gribmap can only handle one grid at a time, and grib2ctl simply was not written for multiple grids types. My suggestion is to make a new GRIB file using one grid type. The following will extract all the records with grid type "N".

wgrib -s oldfile >junk1
wgrib -V oldfile | grep "grid=" >junk2
paste junk1 junk2 >junk3
grep ":grid=N:" < junk3 | wgrib -s -i oldfile -grib -o newfile

Some ETA files will not display

Some of the ETA grids are too big for GrADS. It is a problem with GrADS and not grib2ctl.

Monthly mean Reanalysis files from TAPE are not right.

The tape archive of monthly mean include both the mean and variance. Grib2ctl cannot handle mixed files. You need to separate the means the the variances and run grib2ctl on the new files.

wgrib -s old | grep ":var" | wgrib -s -i old -grib -o var.grib
wgrib -s old | grep -v ":var" | wgrib -s -i old -grib -o mean.grib
grib2ctl.pl var.grib >var.ctl
grib2ctl.pl mean.grib >mean.ctl

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