Very mild weather has invaded France and a good part of Western Europe since Sunday and at the start of the week, with values well above 20 degrees in most regions, and sometimes even 25 degrees! Then gradually rainy disturbances will invade the country between Wednesday and Thursday: a Mediterranean episode of the ‘Cévennes’ type will sometimes give very copious rain. Stéphane Nedeljkovitch from MeteoNews takes stock.
Great sweetness worthy of the end of summer in France
For several days the flow at altitude has been moving south to south-east over Western Europe, linked to a depression approaching the Bay of Biscay and high pressures centered over the Baltic countries.
As a result, temperatures are clearly rising in France, with maximums more and more often exceeding the 20 degree mark since this weekend and Monday, with even a peak of 27.5 degrees recorded in Dax on Monday.
And it will be the same again this Tuesday and tomorrow Wednesday, with temperatures which will be very clearly above seasonal values. In fact, we expect a median of around 23 to 25 degrees in both the North and the South of the country, i.e. a excess of almost five to ten degrees compared to normal and a level worthy of early September.
Increasingly rainy from Wednesday, and ‘Cévennes’ type episode in perspective
But temperatures will slowly drop in the second part of the week, with the arrival of disturbances from the Atlantic. These rains will then be taken up in a southerly flow, which will cause a activation of rains on the Mediterranean rim and in particular in Languedoc, Ardèche and the Cévennes from Wednesday.
Between Wednesday, Thursday and again partly Friday, the rainfall accumulations will sometimes be very significant, particularly in the part mentioned above (nearly 180 to 200 liters of water per square meter), but also overflowing to the edge of Auvergne (between 60 and more than 100 liters)…
The rest of the country will also be well watered in general, but with much less significant accumulations (between 10 and 30 or even 40 millimeters locally): it will however be necessary to monitor areas recently affected by floods such as in Ile-de-France, in the Center or West of the country…
