Overview
- Following Friday's sunny spell with highs near 20–26°C, thunderstorms are set to build on Saturday from the west into Brittany, Pays‑de‑la‑Loire and Normandy.
- Météo‑France expects a broadly rainy Sunday across the country with fewer lightning strikes but steadier rain and daytime values easing toward 18–20°C.
- In Provence, local forecasts call for 15–20 mm of rain, up to 30 mm in places, with gusts near 60–70 km/h in the Calanques on Sunday morning.
- The turn in the weather stems from a cold upper‑level low, which is a pocket of chilly air high in the atmosphere, working with a small depression near Portugal that boosts instability.
- Ouest‑France reports Maine‑et‑Loire under a yellow thunderstorm alert with hail risk and about 20 mm of rain expected on both Saturday and Sunday.