For Urnersee, Sisikon : No gale warning.
We are 80% sure of the situation, because in this type of situation, it is difficult to define precisely when the precipitation will begin.
Fairly cloudless skies becoming changeable during the morning, skies clouding over with storms forming in the afternoon. No precipitation in the morning, showers late in the day.
In the evening, changeable skies with risk of storms. Possibility of showers W force 2 turning NW in the middle of the day then NNW. Gusts reaching 13 knots in the middle of the day. Excellent visibility becoming good in the evening.