Low 987 hPa centered on West Channel moving at 21 knots to the East and rising to 996 hPa to be centered on the North-East of France.
For Gravelines :
No gale warning.
We are 75% sure of the situation, because the high pressure system could move in more quickly than forecast.
Very cloudy skies to overcast. Rain gradually becoming less frequent in the morning, possibility of a few spots in the afternoon. In the evening, very cloudy skies to overcast.
No precipitation. E force 3 turning NE in the middle of the day then NNW. Gusts reaching 20 knots in the morning. Slight sea. Low, short swell from NNE. Poor visibility becoming poor in the middle of the day then good.