Due to the degradation of weather conditions, Météo France places the Alpes-de-Haute-Provence Department in vigilance “Orange” Thunderstorms, this Wednesday, August 13, 2025 from noon and until 9 p.m. “”The meteorological phenomenon will start around 12 noon in high altitude areas (Ubaye, Mercantour) before quickly shift to all the valleys of the department“, Details, in a press release, the prefecture, which calls for the population for caution. The Hautes-Alpes are also on alert this afternoon, specifies Météo France Sud-Est on X..
Important accumulation of rain
Cumulative rain of 50 to 70 mm are expected “in a very short time“. Thunderstorms can be accompanied by hailstorms that can be in a diameter”large“and gusts of wind up to 80 km/h.
This Tuesday, August 12, localized storm episodes had already struck the Southern Alps, notably the Ubaye valley and the Briançonnais where the Montgenèvre pass was cut to traffic due to mudslides.
The Alpes-de-Haute-Provence remain in a vigilance “orange” heat wave and in “yellow” “alert” rain-round. The Hautes-Alpes are also placed in a vigilance “orange” heat wave and thunderstorms and “yellow” alert “rain floods.