[gradsusr] Combining Message's

[Jeff Lake]

Iam attempting to take the NDFD 3hr forecasts
and make them 6hr..
I went cross eyed in the GrADS docs trying to find an answer either way ..

I'll explain my operation,
receive the NDFD GRIB via LDM, use DeGRIB to break each GRIB into
individual .flt and .ctl, which ends up being 3 hours individually
I would like to combine 2, to get a forecast period of 6hrs

is this a possibility with GrADS ?? wgrib2?? or ??

-- 
-Jeff Lake
MichiganWxSystem.com
WeatherMichigan.net
TheWeatherCenter.net
GRLevelXStuff.com