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This section documents and provides learning resources about the different CEMS-Flood data formats and structures.

CEMS-Flood data are available in the following formats:

• GRIB2
• NetCDF4   

GRIB2 is the official supported format, however, NetCDF4 is also supported for some of the datasets (see Table 1). More information on the two formats can be found in the GRIB2 and NetCDF4 sections.

Table 1 - Available data formats by data access service. The auxiliary files are indicated in green.

CEMS-Flood has two services for different spatial domains, EFAS (for Europe) and GloFAS (for the world), each consisting of: 

• Five model outputs: Historical, Forecast, Reforecast, Seasonal Forecast, and Seasonal Reforecast.
• Auxiliary datasets

Table 2 - Information on EFAS and GloFAS grids