Two months of precipitation are expected in 48 hours, according to Alix Roumagnac, president of Prédict, a subsidiary of Météo-France which alerts localities in the event of a dangerous climatic phenomenon. Interviewed by France blue , it confirms that up to 300 mm of rain which is expected during the weekend of All Saints in Hérault and Gard.
Orange vigilance in three departments
Since this Friday, October 29, Gard and Lozère have been tinged with orange to signal the rain-flood vigilance that will be required in these departments. Ardèche was added to the list of departments in orange in the morning, this Friday.
?? 3 deposits in #vigilanceOrange
Stay informed on https://t.co/rJ24zzmmy4 pic.twitter.com/JeJ9hu3U3f
– VigiMétéoFrance (@VigiMeteoFrance) October 29, 2021
17 other departments are placed in yellow vigilance, according to the Weather Vigilance bulletin at 4 p.m. This is the case of Hérault and Aveyron which undergo the same Cevennes episode, a phenomenon caused by the encounter between cold air of polar origin at altitude and masses of hot and humid air coming from the Mediterranean. In the departments concerned, “The weak rains will intensify at the end of the day” this Friday, warns Météo France.
The episode will last until Sunday but “The intensity and location of the most intense precipitation will be specified when the time comes”, specifies the meteorological agency.
# WeatherTomorrow Beginning of the Cévennes episode with sustained rains expected in the afternoon on the relief. A disturbance crosses the country from the west and will water a large western half. https://t.co/oAkxOPa1eb
?? Hilton via @infoclimat pic.twitter.com/pw4vea8dCZ
– Météo-France (@meteofrance) October 28, 2021
Strong winds in Brittany
In the rest of France, Finistère, Côtes-d’Armor and Manche are on yellow alert for strong winds. This is also the case for the Pyrénées-Atlantiques, Hautes-Pyrénées, Haute-Garonne, Ariège, Saône-et-Loire, Ain, Rhône, Loire, Isère and Drôme.
Finally, the Bouches-du-Rhône and the Var are on yellow alert for thunderstorms and flood risks.
The rest of the weekend of All Saints promises to be rainy and windy across the country. Heavy rains will begin this Friday, especially in southern Brittany, Pays de la Loire and Charente.
According to Météo France, the accumulation in the departments that are not affected by the alerts will remain between 40 and 60 mm of precipitation.