EFAS medium-range forecast products

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.
• The 'EFAS Flood probability persistence' layer.
• The ‘Threshold level exceedance’ layers.
• The ‘Rapid Flood Mapping’ and ’Rapid Impact Assessment’ layers.