Violent Thunderstorms and Heavy Rain on Sunday: Orange Warning extended to Four Departments by Météo France
At the same time, almost the entire country is on yellow alert due to thunderstorms and/or rain-flood phenomena.
Chaotic weather in part of France this Sunday 21st September, 2025. After one saturday marked by locally strong thunderstorms, of the violent phenomena are of new expected in the country. Consequence, Meteo France triggered orange vigilance for storms and rain-floods and extended it in its 6 a.m. bulletin this Sunday to four departments:
- Drôme
- Bouche-du-rhône
- Vaucluse
- Var
At the same time, almost the entire country is on yellow alert due to thunderstorms and/or rain-flood phenomena. Météo France does not rule out “a worsening of vigilance in the departments bordering those in orange during the next updates of the map”.
Pour dimanche 21 septembre 2025 :
🟠 4 départements en Vigilance orangeRestez prudents et informés :https://t.co/JGz4rTUvHP pic.twitter.com/h4O426EiRK
— VigiMétéoFrance (@VigiMeteoFrance) September 21, 2025
“An explosive cocktail to generate active storms”
“Sunday morning, the well-established rainstorm line is organized from the Mediterranean towards the Rhône valley and Provence”, explains to news.fr Yann Amice, meteorologist and founder of the site Weathernco.
Warm, humid air, continuously fed by the sea, will encounter colder air at altitude: an explosive cocktail to generate active thunderstorms.
Gusts, hail, sustained electrical activity…
Virulent and not very mobile storms in these areas of the south-east could lead, in places, to heavy accumulations of rain, which could give the equivalent of a month of precipitation in a few hours. The meteorologist anticipates also violent gusts of wind can reach or even exceed 100 km/h, localized hail and sustained electrical activity.
“In summary, we will have a typical Mediterranean episode”, points out Yann Amice.
Thunderstorms also on Monday
During the night from Sunday to Monday, storms risk becoming locally violent between Provence, Var and the Alpes-Maritimes.
Monday morning, stormy activity will continue on the coast of Var and Côte-d’Azur, but also in western Corsica.
In other regions, the weather will remain very disrupted on Monday.
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