g2subset (grib2 subset) allows you to subset (time, field, level, or region) a GRIB2 file and
sends you the result
Subdirectory
|    gefs.20120516 |
|    gefs.20120515 |
|    gefs.20120514 |
|    gefs.20120513 |
|    gefs.20120512 |
|    gefs.20120511 |
|    gefs.20120510 |
|    gefs.20120504 |
g2sub 1.1.0.beta-6 and comments: Wesley.Ebisuzaki@noaa.gov, Jun.Wang@noaa.gov