Bulletin Strong waves are expected Thursday afternoon on the tip of Brittany
Strong waves are expected Thursday in Morbihan and Finistère. Like here in 2022 in Plobannalec-Lesconil. — Fred Tanneau/AFP
Watch out for high tides. Finistère and Morbihan have been placed this Thursday morning in orange vigilance “vagues-submersion” by Meteo-France. In the afternoon, an episode of strong waves is expected on the tip of Brittany around the open sea.
“In a context of high tides, the conjunction high sea levels and very strong waves require special attention,” Météo-France in a morning bulletin.
The strong swell will ease next night
The south-westerly wind remains strong on the coast, and maintains strong seas at sea. which is combined with a powerful West-North-West swell generated by the strong winds blowing offshore, and spreading over the entire Atlantic seaboard.
This strong swell must continue all day Thursday, then start to cool. s’attenuate in the night of Thursday to Friday.
On the other hand, the atmospheric conditions are at the origin of a rise in sea level (surcote), adding to the from sea levels already to high during the high tide on Thursday afternoon (coefficient 96).
The conjunction of this strong swell and these high sea levels could cause submersions by crossing of sea waves on the low or vulnerable parts of the coast of Finistère and Morbihan, mainly at high tide on Thursday afternoon.