[gradsusr] cat *grib* > big_grib messes time frames

[Ivan Toman]

Hello GrADS users,

I'm experiencing problem with concatenating multiple gribs into single 
one if there are more than 255 grib files. If there is 255 or less, 
something like

cat *wrfprs* > grib.grb2

works as expected.

But, if I include 256 or more wrfprs gribs, time frames start to mess 
around (ie first frame in big grib is obvously not first frame/analysis 
of wrf simulation, although wgrib2 and GrADS say it is correct time).

I don't think there is size problem because gribs are relatively small 
and resulting big grib is under 400MB. I use grib2 format.


Did anyone experienced similar problem? Any other method to concatenate 
gribs into single one that might work better?

Thank you

Ivan Toman