For Blattmann : No gale warning.
The reliability of the situation is assessed at 90%.
A few fair-weather cumulus clouds in the morning, some sun but cloud building in the afternoon. The risk of seeing rain will remain low.
In the evening, overcast skies. Showers. W force 2 freshening force 4 in the middle of the day then WSW force 3. Gusts reaching 23 knots in the middle of the day. Excellent visibility.