Fog developing into low cloud during the morning, storms developing in the afternoon.Some showers from late morning.In the evening, warning: storms: considerable electrical activity. Heavy showers. S force 2 turning W force 1 in the middle of the day then SSW. Gusts reaching 9 knots in the morning. Smooth to slight sea. Low, short swell from NW. Visibility reduced by fog becoming poor in the middle of the day then reduced by fog.