EFAS provides medium-range flood forecast indicators based on an ensemble hydrological forecasting system and, for some river points, an additional post-processing. They are calculated up to a 10-day lead time.
EFAS medium-range flood forecast products are displayed as colour coded overview maps and time series information at reporting points that can be viewed under the ‘Flood Summary’ layer of the map viewer. There are five main products:
- The ‘Reporting Points’ layer (from 8th October 2019).
- The ‘Flood Probability’ layers.EFAS 5-year exceedance probability layers
- The ' EFAS Flood probability persistence' Probability layer.
- The ‘Threshold level exceedance’ layers.
- The ‘Rapid Flood Mapping’ and ’Rapid Impact Assessment’ layers.