For PONTOISE : No gale warning.
We are 85% sure of the situation, because the high pressure system could move in more quickly than forecast.
Fog developing into low cloud during the morning, very cloudy skies becoming totally covered in the afternoon. No precipitation.
In the evening, overcast skies. Light rain in the early hours. SE force 2 becoming ESE force 3 in the middle of the day then E. Gusts reaching 18 knots in the evening. Visibility reduced by fog becoming good in the middle of the day then good.