The following is a description of the latest operational release of EFAS
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v5.
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2, which was launched on 13
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August 2024.
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v5.
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2 introduces several minor changes to the system,
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- Post-processing updates:
- Increase temporal resolution of bias-adjusted method (real-time hydrograph) from 24 hours to 6 hours.
- Recalibration of all 1608 station models using the most up-to-date data available (1420 at 6-hourly, 188 at daily).
- River discharge observations are now obtained from a new hydrological database set up by EFAS Hydrological Data Collection Centre (HYDRO)
- Detailed documentation on the post-processing method and post-processing product (Real-time hydrograph) can be found on the dedicated wiki pages, following the release.
Introduction of TAMIR layers:
Four new hourly updated flash flood products developed during the TAMIR project are now available:
Flash flood impact forecasts summarised at the catchment level for four lead time aggregation windows: 0-6h, 07-24h, 25 - 48h, and 49 - 120h
An animated layer showing flash flood impact forecasts over the river network at each timestep for lead times from 0-120h
Accumulated precipitation estimates for the past 24h (updated twice per day)
An animated layer of the 80th percentile of ensemble rainfall forecasted at each timestep for lead times from 0-120h
- Detailed documentation on the TAMIR layers can be found on the dedicated TAMIR wiki pages, following the release.
Technical details
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2022-07-19 12UTC
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 |
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EFAS internal release
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Archiving of data | ECFS, MARS, |
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CDS | |
Reference climatology (for thresholds/ anomalies) | 1992 |
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-01-01 to 2022- |
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12-31 | |
EFAS Historical | 1992-01-01 to near present |
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Reforecasts | tbc |
Horizontal projection |
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EPSG4326 |
Horizontal resolution |
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5 x 5 km
0.01667 x 0.01667° | |
Temporal resolution | 6-hourly |
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