A westerly, weak and particularly variable flow prevails over the whole area.
For Berck sternes :
No gale warning.
For the night from Tuesday to Wednesday W wind force 3 continuing all night. Gusts reaching 18 knots in the early part of the night.
Smooth to slight sea. Low, short swell from W. Excellent visibility. Daytime of Wednesday 19 august : The atmosphere will remain unstable.
Skies changeable to very cloudy. Light showers all day. In the evening, cloudy spells, sometimes dense.
Possibility of showers WNW force 3 becoming force 4 in the middle of the day then W. Gusts reaching 18 knots from the middle of the day. Smooth to slight sea. Low, short swell from W. Excellent visibility.