question on GFS forecast data

[jianjun5212]

I am a new user and have some question:

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In .yaml file:

dates:
start: 2021-03-23 00:00:00
end: 2022-01-01 18:00:00
frequency: 6h

input:
grib:
path:/gfs.{date:strftime(%Y%m%d)}/{date:strftime(%H)}/atmos/gfs.t{date:strftime(%H)}z.pgrb2.0p25.f072

In grib.py, the line s = s.sel(valid_datetime=dates, **kwargs) encounters an issue because dates correspond to the start date (e.g., 2021-03-23T00:00:00), whereas valid_datetime represents the GFS forecast lead time date (e.g., 2021-03-26T00:00:00 for a 72-hour lead time). This discrepancy results in len(s) == 0. How can I align the start date with the file_name date to correctly select the data?

How can I specify different lead times in the config file using a range of values, such as lead_time: [24, 48, 72, 96]?