For U 171 wreck :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Fair weather with mostly clear skies. In the evening, skies with few clouds.
NNW force 3 turning W force 4 in the middle of the day then becoming force 5. Gusts reaching 23 knots in the evening. Slight sea. Low, short swell from W. Excellent visibility.