Fairly cloudless skies becoming changeable during the morning, storms developing in the afternoon.Risk of some spots of rain in the morning, heavy showers in the afternoon.In the evening, warning: storms: considerable electrical activity. Warning: violent squalls. NW force 1 turning W in the middle of the day then ENE force 2. Gusts reaching 18 knots in the middle of the day. Slight sea. Low, fairly long swell from NNE. Poor visibility becoming reduced by fog in the middle of the day then reduced by fog.