g2subset (grib2 subset) allows you to subset (time, field, level, or region) a GRIB2 file and
sends you the result
Subdirectory
|    nfcens.20130523 |
|    nfcens.20130522 |
|    nfcens.20130521 |
|    nfcens.20130520 |
|    nfcens.20130519 |
|    nfcens.20130518 |
|    nfcens.20130517 |
|    nfcens.20130516 |
g2sub 1.1.0.beta-6 and comments: Wesley.Ebisuzaki@noaa.gov, Jun.Wang@noaa.gov