For Bielersee-Unterwasserquellen : No gale warning.
We are 75% sure of the situation, because in this type of situation, it is difficult to define precisely when the precipitation will begin.
Sun but cloud increasing in the morning, very cloudy with possibility of thunder storms in the afternoon. Light showers arriving in late morning, then dying out.
In the evening, changeable skies with risk of storms. Possibility of showers WNW force 2 turning N in the middle of the day then NNE. Gusts reaching 15 knots in the evening. Excellent visibility.