For Grienenbergsee : No gale warning.
The reliability of the situation is good.
Skies changeable becoming very cloudy in the afternoon. No precipitation.
In the evening, fair weather with mostly clear skies. WNW force 2 in the morning turning NNW force 3 in the middle of the day. Gusts reaching 16 knots in the middle of the day. Visibility reduced by mist becoming excellent in the middle of the day then poor.