Storm surge flood warning system

Storm surge flooding information is produced by Météo-France in collaboration with SHOM. SHOM provides real time sea level observations, tide predictions, expertise in coastal hydrodynamics and information on extreme levels and bathymetry (ocean depth).


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The storm surge flood warning system was implemented under the Plan to Prevent Coastal Flooding and Flash Floods, presented by Jean-Louis Borloo, Minister of Ecology, Energy, Sustainable Development and the Sea, at the Council of Ministers on 13 July 2010.


What is storm surge flooding?


Storm surges can cause severe flash flooding along the coast, in harbours and the mouths of rivers.

They are caused by extreme high sea levels due to the combination of several events:

  • the intensity of the tide (sea level mainly due to astronomical phenomena and geographical configuration). The higher the tidal coefficient, t