Intense rain, snow and strong thunderstorms ... The weather will be very rough this Monday

The weather will be still rough this Monday over a large part of the country, with thunderstorms sometimes violent and heavy accumulations of rain to fear. This will be the case in particular in the South-West, where significant floods are expected on the Gascogne rivers, according to Météo-France forecasts.

Two departments, the Landes and the Gironde, also went on Sunday in red rain-flood alertness, while the orange vigilance for rain-flooding is maintained on Charente-Maritime, Gers, Lot-et-Garonne, Pyrénées-Atlantiques, Hautes-Pyrénées, Tarn, Indre-et-Loire, Loir-et-Cher and Loiret, to which six departments have been added: Aube, Haute-Marne, Vosges, l 'Yonne, Côte d'Or and Haute-Saône.

Orange vigilance in Ile-de-France and significant floods on the streams of Gascogne

Part of these departments are also on the alert orange floods (Landes, Pyrénées-Atlantiques, Gers, Lot-et-Garonne, Hautes-Pyrénées), as well as Haute-Garonne and Tarn-et-Garonne. As for the departments of Ile-de-France, they are all on the alert orange for rain-flood and thunderstorms.

🔴 2 dpts in #vigilanceRouge
🔶 25 dpts in #vigilanceOrange

Stay informed on https://t.co/rJ24zzmmy4 pic.twitter.com/UzDmPJIDMK

This very stormy rain-storm situation on Sunday at the end of the afternoon will persist until Monday at midday. It will give exceptional accumulations of rain in the South-West, with significant floods expected on the rivers of Gascogne.

East and north of the Landes, and especially in the Gers, Lot-Et-Garonne and Gironde, we can also approach (or reach) accumulations close to a hundred millimeters in 24 hours, which is considerable (and would be exceptional). #VigilanceOrange https://t.co/g0pbwfJaXo

At daybreak, from Brittany to Normandy and Hauts-de-France, the sky will hesitate between timid sunny spells and cloudy periods with a few showers. Further south, the sky will be overcast and it will rain over all regions.

Intense rains

Heavy rains will water the South of Toulouse, the plains of the Southwest to the Aquitaine coast. Intense rains will also occur from Franche-Comté, Burgundy and south of Champagne-Ardenne. Thunderstorm showers will be present over the southern Alps, the Côte d'Azur and western Corsica.

In the course of the morning, the intense rains will persist in the South-West, the whole of the Grand-Est region will be affected by continuous and sometimes thunderstorm precipitation, it will snow on the Vosges mountains from 600 meters.

Temporarily marked precipitation will water the regions lying to the south of an axis going from Charleville-Mézières to Nantes.

In the afternoon, the rains will remain topical in the south of the regions from Grand-Est to Nouvelle-Aquitaine. They will be marked towards Lorraine and Alsace, more discontinuous from Languedoc-Roussillon towards the Paca region and Corsica. Further north, the weather will be dry, the sky brighter, although the clouds are more present towards the shores of the English Channel.

The return of the thinnings

In the late afternoon and evening, from Roussillon to Languedoc, the lower Rhône valley and the Côte d'Azur, bright spells will return. Rain will always apply from the Pyrenees to the Massif Central and the Alps. Farther north, the thinnings will prevail over the hours with the exception of the regions bordering the English Channel where the clouds will be more tenacious.

The northeast wind will blow strongly over the northwest of the country, reaching 60 to 80 km / h or even up to 100 along the Channel. It will also be strong in the Southwest with gusts at 60 to 70 km / h, in Corsica with peaks at 60 to 70 km / h. Tramontane will be back in the afternoon. Gusts of 80 or even 100 km / h are to be expected in the north of Corsica.

The minimum temperatures will be around 4 to 8 degrees over the northern half of the country, from 8 to 14 over the southern half. The highest will range between 12 and 20 degrees from Flanders to Roussillon, between 22 and 24 in Corsica.

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