The Flood probability persistence layer shows where on the model river network EFAS forecasts a flood, showing the flood severity level together with the flood probability.
The
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persistence
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probability map combines the 2-year (yellow), 5-year (red) and 20-year (purple) total (combining all models) exceedance probabilities, averaged from the two most recent forecast runs. It is used in the definition of the reporting points, in a way that no dynamic point is generated below the minimum probability thresholds (50% / 30% / 30%).