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Parameters

• Output type:  forecast

  • only one forecast product per centre is expected for verification - the best available one for the common inter-comparison

• Output time: 00, 6, 12, 18 UTC (depending on availability)

• Output frequency: between 1 and 6 hours (including step 0 encoded as forecast type as well)

  • the model output steps should be the shortest available
• Wave parameters should be obtained from the full 2-D spectrum (we stress this fact as there seems to be some confusion about wave parameters' names and definitions even in the latest WMO GRIB2 code tables)

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• Providers are asked to provide full sample data from one model run containing all expected parameters, steps, forecast types etc.
• Naming convention for sample data:
  wave_<Organization<centre WMO origin>_acronym>_<YYYYMMDDRR>_<prod/test>_fc.grib2
  acronym listed in the table below
  prod/test ... production or test version of the data
  fc ... forecast (step 0 should be also encoded as of forecast type)
• Merge all parameters from all steps for given model run and output type into one file:
  e.g. wave test forecasts from ECMWF on the 1st of September 2017, 12Z  => wave_ECMWFecmf_2017090112_test_fc.grib2
• Put sample data on ecgate to a directory with reading permission
  • alternatively use any other downloadable location (e.g. google drive)

  • alternatively use this ftp:

    Show If
    special @anonymous
    Alert Log in to see ftp details

    
    

    Show If
    special @authenticated
    Code Block host: ftp.ecmwf.int user: observations passwd: observations2013 directory: wave

    
    

• The naming convention for future production data might change

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