For Urnersee, bei Altdorf : No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Storms developing. Light showers.
In the evening, stormy but gradually improving. Showers. NNW force 2 in the middle of the day turning SSE force 1 in the evening. Gusts reaching 12 knots in the middle of the day. Excellent visibility becoming good in the evening.