g2subset (grib2 subset) allows you to subset (time, field, level, or region) a GRIB2 file and
sends you the result
Subdirectory
|    akrtma.20251208 |
|    akrtma.20251207 |
|    akrtma.20251206 |
|    akrtma.20251205 |
|    akrtma.20251204 |
|    akrtma.20251203 |
|    akrtma.20251202 |
|    akrtma.20251201 |
|    akrtma.20251130 |
|    akrtma.20251129 |
NCEP NOMADS Version 1.2