For U-Boat :
No gale warning.
The reliability of the situation is good.
Clouding over with thunderstorms developing in the morning, warning: storms in the afternoon: considerable electrical activity. Showers in late morning, heavy showers dying away in the afternoon. In the evening, changeable skies with risk of storms.
Possibility of showers SSW force 3 becoming S force 2 in the middle of the day then SSW. Gusts reaching 11 knots in the morning. Smooth to slight sea becoming smooth in the evening. Low, short swell from SSE. Good visibility becoming good in the evening.