This back-to-school week is marked by the return of unstable weather conditions across the country.
In addition to the return of rain and storms, temperatures are trending downward and falling below normal.
This trend could continue throughout the first half of September.
Goodbye anticyclone, hello depressions! After a summery end to August, the weather conditions have deteriorated significantly this week of the start of the school year. Thus, showers and storms dominate or will dominate in most regions, at one time or another… However, reliability is becoming more and more limited as the days go by due to uncertainty about the exact positioning of the cold drop, this famous depression responsible for the instability. It will evolve between the Bay of Biscay and France and could generate bad weather in certain regions.
Rain, showers or storms will not spare any region
This Tuesday is gloomy from the South-West to the eastern regions with rain or showers of a thunderstorm nature. The accumulations can also be significant between the Pyrenees and the central regions. Conversely, the risk of showers will be more limited in the North-West, with beautiful clearings from Brittany to Vendée. In terms of temperatures, the heat is holding up in the east while the drop is marked in the South-West with only 19°C in Tarbes against 30°C in Alsace and even 32 to 33°C in Corsica.
On Wednesday, rain and storms will continue to spread to affect the centre-east, the Rhone Valley, but also part of Occitanie and all the Mediterranean departments. Accumulations will also need to be monitored in the South-East, with precipitation becoming intense the following night. Meanwhile, conditions will be less chaotic in the West, where the risk of showers will remain limited, leaving more room for sunny periods. The mercury will continue to fall, particularly towards the South-East.
Towards a very busy weekend
The risk of bad weather will become particularly pronounced at the end of the week. Precipitation is expected to be intense in the south-east of the country, where the rains could take on a Cévennes or more broadly Mediterranean character during the day on Thursday. Thunderstorms will also break out in the Pyrenees while everywhere else, clouds, clear spells and showers will alternate. Temperatures will be everywhere below seasonal norms with a wind blowing to the north. It will not be more than 18 to 21°C in most regions.
With the cold drop still present in the vicinity of France, the weekend will also be very unstable. It is in the southern half, where the risk of sustained rain and thunderstorms will be the most marked, from New Aquitaine to the Mediterranean regions. The northern half, meanwhile, could find more clement weather conditions with generous sunshine. Temperatures will generally remain 3 to 6°C below seasonal norms.
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It is not the big blue that should dominate on the horizon of the next weekend, quite the contrary. Instability will continue to develop, particularly in a large southern half, on Saturday. Sunday and the following days, the risk of showers will become widespread again. Temperatures, although slightly increasing, will remain below seasonal norms. This trend should also continue next week. Autumn thus seems to want to settle in for the long term.
