The following is a description of the operational release of EFAS v5.2, which was launched on 13 August 2024. For an overview of other EFAS releases, please see: EFAS versioning system.
Summary
EFAS v5.2 introduces several minor changes to the system, including:
- Revised Notification criteria for Formal and Informal notifications:
- Optimised 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 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 exceedance < 48 h and 5-year exceedance > 48 h replace the layers Flood Probability < 48 h and Flood Probability > 48 h, respectively;
- (b) Flood probability layer replaces the former Flood probability persistence layer;
- (c) Reporting Points pop-up window has been updated to show total probability and grand ensemble.
- Improved EFAS notifications email to include a link to a preview feature in the Notifications Archive.
- Optimised 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 5 yr RP threshold of the grand ensemble encompassing all Numerical Weather Predictions.
- Stations metadata have been updated to better align them with the hydrological data collected by EHDCC.
- Updated flood protection levels layer using new information in EU member states
- Updated Major Rivers layer derived from 4 different datasets: FAO AQUASTAT, EU hydro, Natural Earth, and GRDC; improved visualisation of river network and river names.
- Updated documentation on FTP Access
This upgrade of EFAS has no impact on the EFAS modelling results.
Technical details
Pre-release date (available on stage platform) | 2024-07-03 |
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Release date | 2024-08-13 |
In test suite | n/a |
EFAS internal number | 20 |
Archiving of data | ECFS, MARS, CDS |
Reference climatology (for thresholds/ anomalies) | 1992-01-01 to 2022-12-31 |
EFAS Historical | 1992-01-01 to near present |
Reforecasts | tbc |
Horizontal projection | EPSG4326 |
Horizontal resolution | 0.01667 x 0.01667° |
Temporal resolution | 6-hourly |