Considering this panel of actors, the exchanges will be focused on three different application scales:

• the national scale corresponding to the Vigicrues and Vigicrues flash systems operated by the SCHAPI, and the insurance losses modeling chain operated by the CCR.
• the regional scale corresponding to the forecasting chains developed by the local forecasting services such as SPC MedEst.
• the local scale corresponding to warning systems developed by local authorities. The corresponding actors will be invited to contribute to the reflection.

The currently existing operational warning systems, their current performances and limitations, and the wishes for evolutions and improvements expressed by the end users will be at the core of the reflection to shape the new modeling chains to be applied and tested on the considered case studies. This WP is organized in 3 main tasks, described hereafter.

Task 3.1: Analysis of currently existing warning tools and needs for improvements

This task aims to address the following questions:

• What are the main forecasting/warning issues raised by the case-studies?

• How do the current operational system perform and which improvements should be achieved?

Partners involved: All partners

Task 3.2: Definition of the structure of the new warning systems to be experimented

• How should the different data sources and modeling components be combined to provide significant advances?

• Which procedures and metrics should be used for a relevant evaluation of the proposed forecasting chains?

Partners involved: All partners

Task 3.3: Application and evaluation of the proposed warning systems

Partners involved: All partners