A westerly, strong and mostly variable flow prevails over the whole area.
For Berck sternes :
Warning strong breeze offshore.
We are 80% sure of the situation, because hail may not be as easy to predict.
Storms in the early hours. Showers with the possibility of hail. In the evening, very cloudy with risk of storms.
Showers with the possibility of hail. SW wind force 5 from the middle of the day. Gusts reaching 33 knots in the middle of the day. Moderate sea becoming slight in the evening. Low, fairly long swell from WSW. Excellent visibility.