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 for cells with an upstream area greater than 50km2.
The persistence 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%).
