For Urnersee, Sisikon : No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Little cloud in the morning, skies becoming progressively hazier during the afternoon. No precipitation.
In the evening, good clear periods but cloud building. Showers towards the end of the night. SE force 1 turning NNW force 2 in the middle of the day then ENE force 1. Gusts reaching 9 knots from the middle of the day. Excellent visibility.