This is a description of EFAS v4.1. For an overview of other EFAS releases, please see: EFAS versioning system
Summary
EFAS v4.1 is a change in the EFAS Flash Flood (ERIC) layer and general bug fixes.
Here is a a summary of the main changes:
- New criteria for plotting ERIC reporting points. They are now:- Catchments of less than 2000km2 (same threshold as before)
- 30% of the ensemble forecast a flood magnitude threshold greater or equal to the 5yr return period threshold (it was 10% only for EFAS v4.0)
 
- Bugfix to the method to calculate the lead time in the ERIC reporting points  
- Generate a spatial index file (.qix) with the ERIC reporting points to speed up the visualisation of the layer on EFAS-IS
EFAS v4.1 Evaluation Results
Technical details
| Release date | 2021-02-15 12UTC | 
|---|---|
| In test suite | 2021-02-12 12 UTC | 
| EFAS internal release | 019 | 
| Archiving of data | ECFS, MARS, CDS | 
| Reference climatology (for thresholds/ anomalies) | 1991-01-01 to 2017-12-31 | 
| EFAS Historical | 1991-01-01 to near present | 
| Horizontal projection | ETRS89 Lambert Azimuthal Equal Area Coordinate Reference System (ETRS-LAEA) | 
| Horizontal resolution | 5 x 5 km | 
| Temporal resolution | 6-hourly for medium range-monthly products, 24-hourly for seasonal | 
