For Urnersee, bei Altdorf : No gale warning.
We are 75% sure of the situation, because the high pressure system could move in more quickly than forecast.
Very cloudy skies to overcast. Violent showers . warning: hail!
In the evening, overcast skies but some breaks developing. Heavy showers. N force 3 in the middle of the day becoming NNW force 2 in the evening. Gusts reaching 19 knots in the middle of the day. Good visibility becoming good in the evening.