...
- All accumulations shall start from the beginning of the forecast
- The initial state (forecast step zero) must not be included (as it should be 0 value field by definition)
Parameters archived since previous post-processing
- Some parameters (2m tmin/tmax, 10m wind gust) shall be archived with varying length of time range intervals:
0-1/1-2/2-3/4-5/5-6/6-9/9-12/../27-30
Find further in this page GRIB2 files examples including header outputs etc
...