Heavy rainfall, lightning, gusts of wind and hail are expected in the strong summer storms announced by Météo-France for this Saturday, June 29. 31 departments are on orange alert.
An orange “storm” alert has been issued for Saturday, June 29, in 31 departments as a strong storm episode will cross most of the country, according to Météo France.
From the end of the night, strong storms will occur from Landes to Poitou. They will mainly be accompanied by heavy rain, and locally by hail.
List of departments concerned: Landes, Gironde, Charente-Maritime, Charente, Deux-Sèvres, Vienne, Cher, Nièvre, Yonne, Côte-d’Or, Jura, Saône-et-Loire, Doubs, Territoire de Belfort, Haute-Marne, Aube, Haute- Saône, Ardennes, Marne, Meuse, Bas-Rhin, Moselle, Vosges, Meurthe-et-Moselle, Allier, Ain, Cantal, Lot, Aveyron and Tarn.
Rainfall accumulations over a few hours could reach 50 to 80 mm. In the morning these storms will extend to Centre-Val-de-Loire, while from Pays de Loire to Ile-de-France, Champagne-Ardenne and Lorraine, cloudy passages may give rise to locally stormy showers but more isolated.
Similarly, from Occitanie to the Provence-Alpes-Côte d’Azur region, the sky will be very overcast and some showers will be possible from the morning. But at the same time, a more marked stormy deterioration will approach the Pyrenees, and will quickly extend towards the Massif Central.
In the afternoon, from the east of the Pyrenees to Limousin, then to Auvergne Rhône-Alpes, the storms will become strong and multiply, giving high intensities of rain, sometimes hail and powerful gusts of wind.
Some preserved regions
This area of storms will head towards the Centre-Val-de-Loire, the east of the Île de France and Bourgogne Franche-Comté at the end of the afternoon, to reach the Grand-Est in the evening, with continued heavy rain, violent gusts of wind and hail, particularly in the north-east of the country where these storms will be the most violent.
Only the regions from Brittany to Nord-Pas-de-Calais, as well as Corsica, will remain away from this bad weather, and will keep a calmer but cloudy weather. The south-easterly wind will blow quite strongly until the beginning of the afternoon from PACA to the Massif Central.
Morning temperatures will be between 8 and 13 degrees from Brittany to Belgium, 15 to 20 degrees elsewhere, up to 21 to 22 degrees in Corsica. In the afternoon, it will be 18 to 23 degrees near the Channel and the Atlantic, 23 to 28 degrees elsewhere, but up to 27 to 32 degrees from the Grand-Est to Berry, Rhône-Alpes and PACA, and in Corsica, locally 34 in the Alsace plain and on the Isle of Beauty.
