A southwesterly, strong and variable flow prevails over the whole area.
For Stornoway :
Warning moderate gale offshore.
The reliability of the situation is poor.
For the night from Thursday to Friday SSW force 4 in the early part of the night becoming force 5. Gusts reaching 33 knots in the middle of the night.
Moderate sea. Low, short swell from SW. Excellent visibility. Daytime of Friday 19 december : The atmosphere will remain unstable.
Very cloudy. But clear spells will become more and more widespread. Light showers all day. In the evening, good clear periods but cloud building.
Light showers. WSW force 5 in the morning becoming SW force 4 in the evening. Gusts reaching 36 knots in the morning. Moderate sea becoming slight in the middle of the day. Low, short swell from SE. Excellent visibility.