For U 171 wreck :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Skies with few clouds. In the evening, skies with few clouds.
SE force 5 in the middle of the day weakening force 3 in the evening. Gusts reaching 25 knots in the middle of the day. Moderate sea. Moderate, long swell from SW. Excellent visibility becoming good in the evening.