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The following is a description of the pre-operational release of EFAS v5.2, which will be made available from 04 July 2024 in a test phase. EFAS v5.2 is expected to be launched operationally in August 2024. For an overview of other EFAS releases, please see: the EFAS versioning system. 

To test the pre-operational EFAS v5.2 version, you must access the EFAS Stage Platform: https://stage.efas.eu/efas_frontend/#/home

Please submit any feedback you have on EFAS v5.2 updates using the EFAS feedback form: https://european-flood.emergency.copernicus.eu/en/form/feedback

Summary

EFAS v5.2 introduces several minor changes to the system, including:

• Revised Notification criteria for Formal and Informal notifications: 
  
  • optimized criteria for the issue of Formal and Informal notifications are based on a new methodology for the computation of the total probability of exceedance of the 5r 5 yr RP threshold of the grand ensemble encompassing all Numerical Weather Predictions.
    
  • improved definition of the area of validity of Formal and Informal notifications.
  • revised layers in the EFAS Map Viewer:  (a)  5-year exceedence < 48 h and 5-year exceedence > 48 h replaced the layers Flood Probability < 48 h and Flood Probability > 48 h, respectively; (b) Flood probability layer replaced the former Flood persistence layer; (c) Reporting Points pop-up window has been updated to show total probability and grand ensemble. link to new calculation page: placeholder - EFAS 5-year exceedance probability and  placeholder - EFAS Flood Probability
  • improved EFAS notifications email to include a link to a preview feature in the Notifications Archive Dimitar Tasev
• FID now on rapid impact assessment layer? Dimitar Tasev 
• Reporting point updates: label change, probability tables updates, updates to hydrographs,   Juan Pereira Colonese & Corentin Carton de Wiart  changes also need to be made in: placeholder - EFAS Reporting Points page. Reporting points alert levels are now based on the new total probability. For each point new total probability tables and combined hydrograph are shown.

• Stations metadata updates - Stations metadata have been updated to better align them with the hydrological data collected by EHDCC.  Cinzia Mazzetti 
• Update flood protection dataset for the EFAS Rapid Risk Assessment, - Calum Baugh  check if only internal?
• Major rivers layers Juliana Disperati / Dimitar Tasev to explain changes
• 'new' ftp process for EFAS? Arthur Ramos to confirm

This upgrade of EFAS has no impact on the EFAS modelling results.

Technical details Arthur Ramos