Live Updates: Stormy Weather Alert as Atlantic Arc Causes Strong Degradation

At 10:30 p.m, while the storms temporarily weakened in Roussillon and in western Languedoc, heavy stormy rains reached Nîmes and the Rhône valley. In Montélimar (26) and Nîmes (30), 11 mm of water has just fallen in 1 hour. More isolated storms, but strong locally, still concern Maine-et-Loire and Allier where 28 mm of rain has just fallen in 1 hour in Saint-Mathurin-sur-Loire and 34 mm in Marigny (03).

At 9:55 p.m, electrical activity remains strong in Languedoc-Roussillon, and in particular in the Hérault where thunderstorms have been occurring since this afternoon. Other storms, more localized, always burst between Anjou and Poitou, Charentes or the region of Agen.

These storms can pour down cloudbursts in a few minutes, as was the case in Savigny-en-Véron (37) where 37 mm of water just fell in 1 hour or Orgnac Aven (07) with 47, 9 mm of rain recorded between 8 p.m. and 9 p.m.

At 9 p.m., the strongest storms were always reported in Occitania, from the Pyrénées-Orientales to the Gard, but also between Anjou and Touraine.

It was in Languedoc-Roussillon that the strongest thunderstorms were reported, between Perpignan, Béziers, Montpellier and Nîmes. Be careful if you drive in this area, as thunderstorms can greatly reduce visibility and soak the roads.

At 8:15 p.m., powerful storms broke out in Occitania, in particular from Aude to Hérault. The hourly intensities were locally 20 to 30 mm, as in Générargues (Hérault). Very significant accumulations had already been noted:

71 mm in Generargues (30)

52.6 mm in Castelnaudary (11)

50mm in Saint Jean du Gard (30)

42 mm in Saint-Hippolyte-du-Fort (30)

At 7:10 p.m., the storms were violent in Languedoc-Roussillon with a line going from the Pyrénées-Orientales to the Hérault, passing through Carcassonne. Runoff caused some flooding. A violent storm line passed over Toulouse and went up towards the Tarn. On the other hand, sustained stormy rains also fell from Poitou to Sarthe and Mayenne, to the south of the English Channel.

To understand the current stormy evolution, also find our video technical bulletin.

Majestic 👁️ One minute before the storm #Cloud #thunderstorm #photography #toulouse pic.twitter.com/BeZtIT95R7

— C. Moussa🌹 (@KMoussa_) June 9, 2023

A 18h11, the rains are sometimes sustained in the southwest, they will increase in the course of the next few hours. Be careful if you have to move, flooding is possible under the most active cells.

The rainy-stormy front is present from the east of Brittany to the west of the Massif Central. Strong, stormy cells are currently affecting Haute-Garonne, Hautes-Pyrénées and Manche, accompanied by sustained electrical activity. #thunderstorms #hail pic.twitter.com/hCZumukJ8i

— The Weather Channel (@lachainemeteo) June 9, 2023

A 16h50, we noted the strengthening of thunderstorms and rains in Occitania. The Midi-Pyrénées region was already affected by strong localized storms which went up towards the Garonne. Further north, sustained showers fell on Limousin and the south of the Massif Central (Lot, Aveyron). Storms also began to break out on the Aude.

To the northwest, punctual and strong thunderstorms broke out on the borders of eastern Brittany, Sarthe, Mayenne, and the south of Manche and Orne.

At 4:15 p.m., violent storms with very heavy rains broke out in Anjou and eastern Brittany on the one hand, as well as in the interior of Aquitaine, Limousin and Midi-Pyrénées. They are often very intense with rain slowing traffic and causing occasional flooding. Hourly accumulations of 15 to 20 mm are locally observed.

The depression dubbed “Oscar” continues to rise off the coast of Portugal towards the Bay of Biscay. It causes the rise of hot and very humid air over France for the next few hours. This situation, atypical at this time of year, occurring more in the fall, will lead to the development of violent storms, the main characteristic of which will be their heavy rainfall. Tropical storms are expected in Occitania in particular.

Heavy stormy rains have already fallen since Thursday evening on the Atlantic arc, in particular this morning between Charente-Maritime and Morbihan. We had already raised 44 mm in Kernascleden (Morbihan) last night, when a storm passed. This morning, the accumulations reached 54 mm on the island of Oléron (Charente-Maritime) and in Lacanau (Gironde). These thunderstorms tend to move further inland as the hours go by.

THE #thunderstorms The current ones are caused by the rise of warm air saturated with humidity under the effect of the “Oscar” depression. This evolves off the Bay of Biscay (Atlantic), and, in its rotating movement, brings up a mass of air coming from the south.⛈🌧 pic.twitter.com/SvOj6noVUu

— The Weather Channel (@lachainemeteo) June 9, 2023