Départ
Today in Sion, instability will build during the day.
Clouding over with thunderstorms developing in the morning, very cloudy with possibility of thunder storms in the afternoon. No precipitation in the morning, light showers in the afternoon. Light winds.
We are 80% sure of the situation, because the atmosphere might be less unstable and showers rarer than forecast.
Temperatures will vary between 21 and 32°C, it will be very warm in the afternoon.
Tonight, skies clearing but continuing risk of storms.
Light showers progressively becoming less frequent. Light winds.
