g2subset (grib2 subset) allows you to subset (time, field, level, or region) a GRIB2 file and
sends you the result
Subdirectory
   nam.20250708 |
   nam.20250707 |
   nam.20250706 |
   nam.20250705 |
   nam.20250704 |
   nam.20250703 |
   nam.20250702 |
   nam.20250701 |
NCEP NOMADS Version 1.2