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.
Warm sun all day. In the evening, clear skies.
NE force 2 turning WSW force 3 in the middle of the day then W. Gusts reaching 14 knots in the evening. Smooth sea becoming smooth to slight in the evening. Low, fairly long swell from WSW. Excellent visibility.