For Osterholz :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Good clear periods but cloud building. No precipitation. In the evening, cloud and long sunny periods.
No precipitation. WNW wind force 4 from the middle of the day. Gusts reaching 25 knots in the middle of the day. Smooth sea. Low from N. Excellent visibility.