The edges of the Mediterranean will still be vigilant orange Saturday due to rain-flood, thunderstorms, strong and raw wind, according to a bulletin of Météo-France broadcast Friday. Elsewhere, the weather will be overcast and often slightly rainy. Near the Mediterranean, the rains will intensify on the Cevennes relief, then in the evening on the Gard and Herault plain, the Bouches-du-Rhône, the Var and the Alpes-Maritimes, with a stormy character for these 5 coastal departments.
The risks of rain-flooding will concern 7 departments: Ardèche (07), Lozère (48), Alpes-Maritimes (06), Bouches-du-Rhône (13), Gard (30), Hérault (34) and Var (83) . These last 5 departments will also be orange for Storms (30, 34 and 83). And 3 departments will be vigilant orange for strong wind: Ardèche (07), Isère (38), Loire (42). In addition, the departments of Ardèche (07), Aveyron (12), Bouches-du-Rhône (13), Gard (30), Hérault (34), Lozère (48) ) and Var (83) will be in orange alert for flood risk.
Thunderstorms and hail on the Southeast
By Saturday evening, we expect 200 to 300 mm of rain on the Cevennes relief with intensities of the order of 15 to 30 mm per hour. On the Gard plains, the eastern Hérault, the Bouches-du-Rhône and the Alpes-Maritimes, the stormy rains can give accumulations of 80 to 120 mm, or up to 180 mm on the Grasse Prealps. On the Var, the stormy rains will give accumulations generally between 120 and 150 mm, locally 180 to 250 mm even punctually a little more. Thunderstorms will discharge 40 to 80 mm for a few hours, sometimes accompanied by hail, strong gusts, or even swirling phenomena near the coast. These heavy rains should diminish significantly late afternoon on Saturday side Cevennes, but it will be necessary to wait for the night from Saturday to Sunday for the PACA region.
Gusts up to 120 km / h in Ardèche
Aggravating phenomena, the wind will blow in storm on the Cevennes peaks, very close to the coast. Strong waves will also be expected on the Languedoc coastline from next night. For the 3 departments in vigilance orange wind: the wind of south-east will continue to strengthen in the next hours of Friday, it will be particularly strong until Saturday morning on the heights of the Massif Central, with 100 to 120 km / h expected on the Ardèche plateau and the heights of Pilat, and over 100 km / h possible on the agglomeration of Saint Etienne and the valley of Gier down to Givors. The wind will be strong in the mountains on the Vercors and the inland Alps with gusts above 100 km / h at altitude that can thwart the activity of ski resorts. This wind could also affect the plain areas where structures have already been weakened by last week's snowfall.
Saturday, heavy rain storms will continue from Languedoc to the Côte d'Azur, accompanied by a strong wind from east to southeast with gusts can exceed 100 km / h on the coast and the heights. Showers will overflow in Corsica, as well as some thunderstorms on the east coast swept by a southerly southerly wind. On the edge of the departments in orange vigilance, the rains will be moderate from Auvergne to the Alps, with a rain-snow limit to 1,700 to 1,800 m, falling to 1,200 m in the evening on the Massif Central, when the rains weaken.
Overcast weather in the rest of the country
On the rest of the Hexagon, the weather will be gloomy. It will be overcast and slightly rainy from the North to Burgundy, a good part of the day on the Atlantic coast and the afternoon on the Southwest. From Normandy to the Center, and on the North-East, the weather will be drier but the sky very heavy, with morning greyness often slow to dissipate especially in the plain of Alsace. The west wind will turn west on the Atlantic seaboard and blow at 60/70 km / h, locally 80/90 in Aquitaine. The tramontane takes over the afternoon and reaches 100 km / h on the Roussillon at the end of the day and evening.
Temperatures will continue to slightly soften with a minimum of between 6 and 10 degrees in general, another 2 to 5 on the Grand Est, at the opposite 10 to 13 degrees near the Mediterranean. The maximum will peak between 7 and 10 degrees in the East, elsewhere they will range from 10 to 14 degrees in general, 15 to 17 around the Mediterranean, 17 to 19 in Corsica.