PLEASE NOTE THAT THE CONTENT IN THE EFAS USER GUIDE IS REFERRING TO THE UPCOMING EFAS v5.6 (release on Wednesday 25th February)
AND NOT TO THE CURRENT OPERATIONAL VERSION! 

YOU ARE WELCOME TO ACCESS AND TEST THE NEW VERSION ON: https://stage.efas.eu/react/map


The criteria currently in place for the issue of an EFAS Pre-Tasking request are listed below:

  • An EFAS Formal or Informal notification has already been sent to relevant EFAS partner(s). Pre-Tasking is not issued based on Flash Flood signal.
  • Total flood probability median (i.e. 50% probability) needs to exceed the 20-yr RP threshold.
  • Start of the event (i.e. median exceeding the 5-yr RP threshold) generally within 24-36 hours from the current time (can be less, cannot be more).
  • Area part of EFAS Condition of access.

Additional considerations:

  • The spread of the total probability shown in the reporting point pop-up window forecast is not very wide (high certainty in the forecasts).
  • The historical model performance (where available) is adequate indicating that the model is not lacking of process representation.
  • Adequate accuracy of water balance (hydrological simulation driven by the most recent meteorological observations), indicating that the initial model conditions are correct.
  • The forecast should be persistent and affecting a reasonably long stretch of a river (as displayed in the layer "Flood probability"- layer from the "Flood summary" tab).
  • Presence of a signal from the Rapid Impact Assessment layer can considered as supporting information.
  • Flows are not significantly affected by reservoirs.

   

Example of the forecasts from EFAS-IS for the event in northeast Romania during late spring 2025

 


 Comparison between Pre-Tasking criteria and EFAS Formal and Informal notifications criteria


EFAS NOTIFICATIONPRE-TASKING E-MAIL
Start of the event in EFAS forecast> 48 hours (Formal), could be lower (Informal)24-36 hours
Probability≥ 50% (Formal), ≥ 40% (Informal) of 5-y RP (Total probability)> 50 % of 20-y RP (Total probability)
Recipientsall partners in the catchmentonly affected partners (according to the Area of Interest)
Attachmentsnonearea of interest (*.geojson, *.kml)


Didn't find what you were looking for? Send us a message at info@efas.eu or go to the EFAS webpage and use the contact form. 

  • No labels