A southerly, very strong and variable flow prevails over the whole area.
For Calais :
No gale warning.
We are 90% sure of the situation, because flows might be far more disturbed than forecast.
For the night from Friday to Saturday S force 3 in the early part of the night becoming SSE force 2. Gusts reaching 12 knots in the middle of the night.
Smooth to slight sea becoming smooth at the end of the night. Low, short swell from W. Poor visibility becoming good in the middle of the night then good. Daytime of Saturday 20 december : The weather will become more uncertain during the day.
Very cloudy skies to overcast. The risk of seeing rain will remain low. In the evening, very cloudy.
Chance of light rain. SE force 2 becoming ESE force 3 in the middle of the day then SE. Gusts reaching 15 knots in the middle of the day. Smooth sea. Low, fairly long swell from W. Good visibility becoming good in the middle of the day then reduced by mist.