For Lac de Montriond : No gale warning.
We are 75% sure of the situation, because the atmosphere might be less unstable and showers rarer than forecast.
Very cloudy skies to overcast. Light rain.
In the evening, very cloudy skies becoming totally overcast. Light showers. SW force 1 in the middle of the day turning SSE in the evening. Gusts reaching 12 knots in the evening. Poor visibility becoming good in the evening.