A few days after the torrential rains fell on the Lyon region, new thunderstorms are expected this Thursday afternoon. A stormy degradation will arrive by the Atlantic coast in the late afternoon and early evening from Brittany to Aquitaine, but it will be "of lesser intensity", forecasts Météo France. At 9 am this Thursday, 28 departments are placed in yellow vigilance by the forecaster.
🟡⛈️ #Vigilancejaune#Orages for #Vendée, #LoireAtlantique, #MaineEtLoire.#Morbihan, #Finistère.#cotedarmor tomorrow Thursday from mid-afternoon. In addition to the #foudre, significant rainfall intensities in places expected.
➡️Stay informed about https://t.co/DmFQwi3dce . pic.twitter.com/YANJMpz3nd
— Weather France West (@MeteoFrance_O) June 7, 2023
From midday, clouds should appear from the Grand Est to Auvergne-Rhône-Alpes, and north Paca, as well as the relief of Corsica, with "some showers, even a clap of thunder on the different reliefs of the east".
This change in weather is caused by the Oscar Depression from the Atlantic, which interacts with warm air on the surface in France.
⛈️A change of weather is brewing over the Atlantic...
The #Oscar #BorrascaOscar depression is involved: approaching = deterioration of conditions in the West: #orages possible near the Atlantic Thursday night, then p-ê + largely Friday. But why?
— Weather France West (@MeteoFrance_O) June 6, 2023
On the temperature side, it will be hot with 26 to 30 ° C announced in the country, and up to 31 ° C on the Centre region or Agenais.
Stormy weather is expected to continue Friday afternoon and into the evening over a large western and southern half of the country. Weather France forecasts "strong accumulations of precipitation in a short time" and hail all day.
And for the weekend? On Saturday, rare showers are expected on a line from Normandy to the Mediterranean. Elsewhere, the sky will be milder and temperatures between 25 and 30 ° C. On Sunday, thunderstorms could settle on the northern and eastern half of the country. 30 ° C are expected in Alsace.
The country is observing unusual weather with significant rainfall accumulations since mid-May over the southern half of the France, while the rest of the country has suffered a lack of rain, accentuated by a "drying" wind. A phenomenon that can be explained by a "blockage" since mid-May on the Mediterranean basin, a depression; around the British Isles, an anticyclone. "With fairly warm air, the low-pressure zone generates cloud formation and leads to disturbances. Conversely, the anticyclonic blockade further north brings sunny and dry weather, "explained Sébastien Léas, forecaster at Météo France.