2023-11-02 20:12:54
Bad weather linked to the end of storm Ciaran will affect New Aquitaine in the coming hours but in no way comparable to the attacks suffered by Brittany. It is mainly the coasts of Gironde, Landes and Pyrénées-Atlantiques which should be concerned, according to information from Météo-France this Thursday.
From Friday midnight and until Friday afternoon, significant precipitation and strong winds are expected “on the coast and inland in this area”, specifies Météo-France. Gironde is placed on orange alert for the wind from Friday midnight to 6 a.m. “Strong gusts will blow on the Aquitaine coast, as well as on the coastal area of Gironde: they could reach 100 to 120 km/h, even 130 km/h on the coast and 90 to 110 km/h on the western part of the department. Trees that are still leafy on waterlogged soils will be all the more vulnerable and aggravating factors to take into account” indicates the prefecture of Nouvelle-Aquitaine this Thursday evening.
Waves “of 4 to 9 meters expected”
The Landes and the Pyrénées-Atlantiques are placed on orange alert for the wind which could also reach 130 kmh on the coast, waves-submersion (until Friday morning), rain-floods (until Friday 4 p.m.). For this latest alert, “the entire department is concerned,” specifies the Pyrénées-Atlantiques prefecture, “with locally sustained and lasting rain, sometimes stormy. Rainfall accumulations of 50 to 80 mm are expected.” The other departments in the region are on yellow alert, particularly for rain and wind.
The situation will remain very disturbed throughout the weekend. “Meteo France is forecasting a phenomenon of significant winds across the entire Atlantic coast between Friday and Monday,” the Atlantic maritime prefecture announced this Thursday evening. This risk will also be accompanied by a risk of wave-submersion, with sea force 6 to 7 and waves of 4 to 9 meters which are expected on the Atlantic coast. »
Several train lines canceled
The SNCF announced this Thursday evening “that no trains will run on Friday until 10 a.m. on certain lines on the Atlantic coast and in the south of the network. » Travelers are asked to “anticipate or postpone their trip. »
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Increased risk of Belharra wave
Until the end of Friday morning, “the weather and maritime conditions will be met to trigger the legendary Belharra wave”, estimates the Pyrénées-Atlantiques prefecture, in a press release. For this wave, linked to the geology of the underwater plateau of Belharra Perdun, to arise, a significant swell, strong tidal coefficients and in particular a southerly wind are required. It can reach up to 20 meters high.
In the wake of storm Ciaran which will hit the north west of France more directly, a swell of up to seven meters is expected this Friday on the Basque coast, “with a major risk of erosion and landslides on the facade rocky,” warns the Pyrénées-Atlantiques prefecture. The Corniche road, between Hendaye and Ciboure, was closed to traffic from 4 p.m. this Thursday, and is not expected to reopen for several days, while the Corniche path, on the cliffside, is closed at public and traffic by prefectural decree since November 2021. Notice to the most curious who are asked not to take unnecessary risks.
Saving the oysters of the Banc d’Arguin, before Christmas
In the Arcachon Basin, oyster farmers have already suffered from storm Céline. Particularly on the Banc d’Arguin, part of the parks find themselves silted up after its passage. “Our fear for the days to come is to know if the Banc d’Arguin will continue to advance and cover the oyster farming equipment which could not be saved in recent days,” explains Alexandra Teixeira, communications manager at the Committee. Regional Shellfish Farming Arcachon Aquitaine. There is therefore a fear that the sand will continue to advance and cover the entire production and that this will destroy everything, knowing that the production of the Banc d’Arguin was already enormously impacted last weekend. [par la tempête Céline] and we are two months away from Christmas. »
This Thursday, the oyster farmers who can are active because it is their last chance to recover their equipment and their production, then the next window made possible by the tidal coefficients will be November 13.
Many closed beaches
The beaches of Lacanau will all be closed this weekend until Sunday inclusive. Also at Teste-de-Buch, on the Arcachon Bay, vehicle parking and access to ocean beaches are prohibited until Monday, November 6 in the evening. Access to Vendays-Montalivet beach is also prohibited and it is strongly recommended not to go into the forest.
At Cap Ferret, the latest bad weather did not cause any flooding but accelerated erosion, particularly on the southern tip of the peninsula. “In one week, we lost two to three meters on Horizon beach, in front of the first aid station,” points out Philippe de Gonneville, the mayor of Lège-Cap-Ferret. This is worrying. »
As a precaution, until Monday, the ocean beaches between Sémaphore and Pointe and Truquet beach are closed, as well as the outdoor market, playgrounds, sports fields, and the Grand Picquey pier. A decision taken “in relation to the fairly large presence of vacationers,” explains the elected official. There are among them people who are not used to experiencing gales. » This is the fourth storm since the end of a summer that played into overtime this year. “We are paying the price, because we know that conflicts between very warm air masses and cold air masses can generate this kind of depression,” laments the mayor. It is with concern that winter is looming on the peninsula.
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