For U 171 wreck :
No gale warning.
The reliability of the situation is assessed at 90%.
Cloud and long sunny periods. Light showers. In the evening, overcast skies.
No precipitation. W force 5 in the middle of the day becoming force 4 in the evening. Gusts reaching 24 knots in the evening. Rough to very rough sea. Moderate, long swell from WSW. Excellent visibility.