g2subset (grib2 subset) allows you to subset (time, field, level, or region) a GRIB2 file and
sends you the result
Subdirectory
|    akrtma.20260930 |
|    akrtma.20260929 |
|    akrtma.20260928 |
|    akrtma.20260927 |
|    akrtma.20260926 |
|    akrtma.20260925 |
|    akrtma.20260924 |
|    akrtma.20260923 |
|    akrtma.20260922 |
|    akrtma.20260921 |
NCEP NOMADS Version 1.2