Event weather update
Weather forecast - Saturday, 31 August
SATURDAY 31: unny this morning with cloudy intervals at around 3000/4000 m.
- Clouds thickening later on.
- After 3 PM, the first very localized thunderstorms. Thunderstorms becoming widespread from 5 PM to 10 PM.
- Possibility of a very heavy downpour lasting 30 minutes to 1 hour (15/25 mm).
- Higher amounts not excluded. In the case of a heavy downpour, a rapid and significant drop in temperature (by 5 to 8 degrees) is expected.
Highs:
- Chamonix: 27 degrees.
- Courmayeur: 25 degrees.
- Around 2000 m: 20 degrees with light winds followed by thermals.
- Around 2500 m: 17 degrees with southwest winds at 10/30 km/h.
Saturday night to Sunday: Still stormy in some places early in the night, then cloudy banks possibly clinging to the slopes, with the main cloud ceiling at around 3000/4000 m.
SUNDAY, SEPTEMBER 1: Some sunny intervals, with thunderstorms developing after mid-afternoon. Heavy thunderstorms in the late afternoon/evening.
- Chamonix: 13/25 degrees.
- Around 2000 m: 13/18 degrees.
- Next forecast at 5 PM.
