Clouding over with thunderstorms developing in the morning, storms developing in the afternoon.Risk of showers in the morning, showers in the afternoon.In the evening, warning: storms: considerable electrical activity. Heavy showers. ESE force 2 in the morning temporarily SE force 3 in the middle of the day. Gusts reaching 13 knots in the middle of the day. Moderate sea. Low, fairly long swell from S. Visibility reduced by mist becoming good in the middle of the day then reduced by mist.