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Storm Nils: France Braces for Impact as Red Alerts Issued for Flooding and 140km/h Winds
France is facing a severe weather event as Storm Nils sweeps across the country, bringing with it the threat of damaging winds and widespread flooding. Authorities have issued red alerts for several departments, urging residents to take immediate precautions. This is a developing story, and Archyde.com is committed to bringing you the latest updates as they unfold.
Red Alerts in Effect: Where is Storm Nils Hitting Hardest?
The Aude department is currently on red alert for extremely strong winds, with gusts expected to exceed 140 km/h. Simultaneously, Météo France has placed Gironde and Lot-et-Garonne on red alert due to “significant and lasting” flooding along the Garonne river. The storm, fueled by a deepening depression in the near Atlantic, is currently impacting Aquitaine and is forecast to move towards the English Channel.
Wind Speeds and Orange Alerts: A Broad Impact
Beyond the red alert zones, fifteen departments are under orange wind alert, including Ariège, Aveyron, Charente-Maritime, both Corsican departments, Haute-Garonne, Gers, Hérault, Landes, Lozère, Pyrénées-Atlantiques, Hautes-Pyrénées, Eastern Pyrenees, and the Tarn. Corsica is already experiencing strong gusts, with 120-140 km/h expected on Cap Corse. Languedoc-Roussillon is bracing for winds of 120-150 km/h. The Weather Channel notes that the intensity isn’t just due to the depression itself, but a wind acceleration effect between the Massif Central and the Pyrenees.
Flooding Threat: Garonne River at Risk
The flooding situation is particularly concerning in Gironde and Lot-et-Garonne, where overflows on the Garonne river are anticipated to be “very significant” from Wednesday night into Thursday. Vigicrues predicts water levels could surpass those seen in January 2022 and even rival the levels of February 2021. The intense rainfall, particularly in the West and South-West, is exacerbating the risk, with up to 10 mm/h expected between Brittany and Pays de la Loire.
The Venturi Effect: Why These Winds Are So Strong
Meteorologists explain that the strong southerly winds are a result of a phenomenon called the Venturi effect. The terrain between the Massif Central and the Pyrenees acts like a funnel, compressing the westerly flow from the Atlantic and accelerating the wind as it rushes towards the plains of Languedoc, and Roussillon. This effect is creating exceptionally strong gusts in exposed areas like the Corbières, the Lauragais threshold, and the Cévennes ridges. Gusts of 150 to 160 km/h are possible in the tramontane, with peaks potentially reaching 200 km/h on certain summits.
While these speeds are substantial, they are currently expected to remain below the extreme values observed during the storm Klaus in January 2009, which saw regional records exceed 180 km/h in Perpignan and 200 km/h at Cap Béar.
As Storm Nils continues its path, staying informed and heeding the advice of local authorities is crucial. For the latest updates, safety guidelines, and potential travel disruptions, visit Archyde.com regularly. We’ll continue to monitor the situation and provide timely, accurate information to help you stay safe and prepared.