Low 980 hPa centered to the South-West of Ireland moving at 20 knots to the East to be centered on the South-West of England.
For Grève des Fosses :
Warning fresh gale offshore.
We are 80% sure of the situation, because the atmosphere might be less unstable and showers rarer than forecast.
Skies very cloudy, risk of thundery outbreaks during the afternoon. Light showers all day. In the evening, very cloudy.
Possibility of showers SSW force 5 becoming SW force 6 in the middle of the day then WSW. Gusts reaching 40 knots in the middle of the day. Slight sea becoming moderate in the middle of the day. Low, fairly long swell from NW. Excellent visibility.