For Urnersee, bei Altdorf : No gale warning.
We are 80% sure of the situation, because the atmosphere might be less unstable and showers more frequent than forecast.
Cloud and long sunny periods. No precipitation in the morning, possibility of showers in late afternoon.
In the evening, skies clearing but continuing risk of storms. Possibility of showers SE force 1 turning N force 2 in the middle of the day then SE. Gusts reaching 13 knots in the evening. Excellent visibility.