For Lac de Montriond : No gale warning.
We are 80% sure of the situation, because the atmosphere might be less unstable and showers rarer than forecast.
Overcast with reduced visibility in the morning, very cloudy with possibility of thunder storms in the afternoon. Showers all day.
In the evening, very cloudy with risk of storms. Showers becoming less frequent. SSW force 3 in the morning becoming S force 2 in the middle of the day. Gusts reaching 22 knots in the morning. Visibility reduced by mist becoming good in the middle of the day then poor.