High 1026 hPa centered on the North of the Bay of Biscay moving at 10 knots to the North-West to be centered on Brittany.
For Siouville :
No gale warning.
We are 90% sure of the situation, because the atmosphere might not be as stable as forecast.
Very cloudy. No precipitation. In the evening, good clear periods but lots of cloud, too.
No precipitation. SW force 4 in the middle of the day becoming WSW force 3 in the evening. Gusts reaching 21 knots in the middle of the day. Slight sea. Low, short swell from W. Excellent visibility becoming good in the evening.