Low 997 hPa centered on the South-East of the Bay of Biscay moving at 13 knots to the North-West to be centered on the North of the Bay of Biscay.
For Grande plage de Sion :
Warning strong breeze offshore.
We are 80% sure of the situation, because the atmosphere might be less unstable and showers rarer than forecast.
Overcast skies. Light showers. In the evening, very cloudy skies to overcast.
Light showers progressively becoming less frequent. ESE force 4 in the middle of the day turning S force 5 in the evening. Gusts reaching 28 knots in the evening. Moderate sea. Moderate, long swell from SW then low from SSE in the evening. Excellent visibility becoming good in the evening.