Für La Tranche-sur-Mer :
No gale warning.
We are 70% sure of the situation, because the high pressure system could move in more quickly than forecast.
Clouding over with thunderstorms developing in the morning, skies clearing but storms likely in the afternoon. Light showers arriving in late morning, then dying out. In the evening, skies progressively clouding over with storms forming.
Showers with the possibility of hail. E force 3 becoming force 4 in the middle of the day then S force 3. Gusts reaching 22 knots in the evening. Smooth to slight sea. Low, short swell from WSW. Poor visibility becoming excellent in the middle of the day.