The average wind was recorded at 96 km/h at Cap Ferret, but with gusts to 132 km/h. The Cap Ferret buoy counted a swell with a minimum wave height of 8 meters and a maximum of 13.9 meters with a period of 12.1 seconds. Finally, a surge of 0.52 meters is observed on the Eyrac site in Arcachon at the height of high tide.
If the coast of Nouvelle-Aquitaine was generally little affected by the storm, says the report, the impact was still real on the beaches of the Basin. It has even been described as harsh in places. There has been no erosion at Grand Crohot. The water arrived at the foot of the dune at Torchère and Horizon. “At the root of Mimbeau, a slight erosion of the top of the beach profile was noted. »
The Pilat dune attacked
On the beaches of La Teste-de-Buch, things are more complicated as erosion and the movement of the ocean are disrupted by the exit from the Arcachon basin. Thus, the observatory notes the Formation of a small erosion cliff at the base of the Pilat dune, having led to a retreat of the dune base of 0.5 to 1 meter, and an erosion microcliff approximately 25-30 cm high on the top of the beach. but in Gaillouneys, that is to say to the south of the dune, it is the opposite: a significant sedimentary accretion at the top of the beach!
