C3S2_413_bis Lot 1: Maintenance and extension of the Operational Windstorm Service

Description du marché

The objective of Lot 1 is to ensure the continued operational delivery, maintenance, and scientific robustness of the Operational Windstorm Service and its ERA5-based extra-tropical cyclone (ETC) diagnostics, datasets, applications and notebooks, while extending the service to meet evolving user needs, especially for insurance/catastrophe modelling, by strengthening QA, providing L2 user support and updated training material, and preparing migration to ERA6 through targeted testing and sensitivity assessment. The extension work includes broadening the geographic domain beyond Europe (to at least Northern Hemisphere mid-latitudes, and potentially Southern Hemisphere), adding variables and derived products (e.g., precipitation linkage, return periods), improving downstream-relevant statistics (including UNSEEN/synthetic/analogue/AI generative approaches with benchmarking and documentation), developing storm indicators usable across reanalysis and climate projections (CMIP/CORDEX) without explicit storm tracking, and co-developing user-driven case studies and online demonstrators with clear documentation and dissemination assets in coordination with ECMWF and (where relevant) Lot 2.

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