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However, NetCdf library , used to decode the grib2 format, does not provide a separate variable for each series. Netcdf library combines both accumulated series in one series (mixed intervals series)
In picture below there are two values for event time 2021-10-11 12:00 : the first one is accumulated value from the start of the forecast , the second one is accumulated value for the last 6 hours
Using property “Read_Grib2_Accumulation_Message_Number” we can specify which one is required:
<int key="Read_Grib2_Accumulation_Message_Number" value="1"/> or
<int key="Read_Grib2_Accumulation_Message_Number" value="2"/>
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