For Alpnachersee-Grenzstein : No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Skies very cloudy to overcast in the morning, sunny in the afternoon. No precipitation.
In the evening, skies with few clouds. NNE force 2 in the morning turning SSW in the evening. Gusts reaching 10 knots from the middle of the day. Good visibility becoming excellent in the middle of the day.