A storm will hit the south of France between Wednesday October 16 and Thursday October 17, causing locally very significant amounts of rain.
A few days after the Kirk depression, new disturbances arrived in France. From this Tuesday, October 15 in the evening, a rain-storm phenomenon present in Spain will gradually reach the Pyrenees then Languedoc-Roussillon, causing a “long-lasting Cévennes episode” according to Météo-France.
This phenomenon, well known to meteorologists, which refers to intense and localized storms, generally occurs in autumn when a warm and humid wind coming from the Mediterranean heads north and gets stuck against the mountainous reliefs of the Cévennes.
This disturbance is accentuated by the remains of ex-Hurricane Leslie “which is approaching Portugal” and “which will bring up a very gentle, even warm air mass flowing from south to southwest over the whole of the country”, details the specialized site La Chaîne Météo.
Heavy rain, 100 to 150mm expected
Heavy rainfall is expected in the southern half of the country. On Wednesday, Météo-France estimates that 100 to 150 mm of rain could fall on the Cévennes terrain. Precipitation will affect to a lesser extent the plains of Languedoc, where around 50 mm of rain is expected, the Provence-Alpes-Côte d’Azur region and eastern Corsica.
“On the border part of the Pyrenees with Spain, the rains will also be significant, up to 50 to 70 mm,” indicates Météo-France.
On Thursday, the disturbance will progress further north “undulating over a large center of the country”. From northern Occitanie to Burgundy, up to 60 mm of rain is forecast. On the plains of Languedoc and Provence-Alpes-Côte d’Azur, “unstable rains risk increasing compared to the day before”, fears Météo-France, with locally around 50 to 80 mm. On the relief of the Cévennes, we expect an additional 100 to 150 mm on Thursday.
After a historically rainy month of September, the reaction of rivers must be monitored.
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