Clouding over with thunderstorms developing in the morning, warning: storms in the afternoon: considerable electrical activity.Fairly heavy showers for a time.In the evening, clear periods developing. Light showers progressively becoming less frequent. W force 2 turning N in the middle of the day then SE force 1. Gusts reaching 8 knots in the middle of the day. Smooth to slight sea. Low, short swell from NE. Visibility reduced by mist becoming poor in the middle of the day then reduced by mist.