Météo-France nevertheless warns of locally heavy accumulations in a short time, exceeding 100 to 150 mm. The forecaster also anticipates whirlwind phenomena along the coast.
This vigilance level responds to stormy rains expected along the Mediterranean coast. Heavy rainfall is forecast from Saturday afternoon in the Gard and Bouches-du-Rhône, the two coastal departments targeted first.
In its Saturday bulletin, Météo-France indicates that showers are already affecting the Gard and Bouches-du-Rhône. They are expected to continue throughout the day, before spilling slightly eastward.
Hérault is included in the system only for its eastern part. The forecaster specifies that this spillover will occur without particular severity, after the showers pass over the two neighboring departments.
The Bouches-du-Rhône prefecture stresses that the soils, already particularly wet after recent rainy episodes, increase the risk of runoff and flooding. It calls for the utmost vigilance.