For Lac de la Gruyère-Sur Mo : No gale warning.
We are 80% sure of the situation, because there is a doubt about the altitude of the rain-snow line.
Very cloudy. Showers towards the end of the night.
In the evening, very cloudy skies to overcast. Showers of rain and snow. SW force 4 in the middle of the day weakening NW force 1 in the evening. Gusts reaching 21 knots in the middle of the day. Excellent visibility becoming reduced by mist in the evening.