These two episodes of poor weather conditions have the exact same origin: they are chilly drops that have crossed France from west to east.
Satellite animation of the #melancholy dependable since yesterday for a significant episode of terrible climate in France, the 2nd in significantly less than 48 hrs. It has been excavated in the Bay of Biscay and is advancing with issue, which points out the violence #temporal In development. pic.twitter.com/OQxT59Mz6U
– The Weather Channel (@lachainemeteo) August 17, 2022
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On Tuesday the get started of hostilities in Paris and Languedoc
Tuesday afternoon marks the commencing of lousy weather conditions with violent thunderstorms that strike Paris and its region, triggering flooding in the metro.
On Tuesday night, 46 mm of rain fell on the funds in 1 hour, as lots of as involving 30 June and 15 August. It is also the strongest rainfall in 24 hrs from the 72 mm of h2o of the violent storm of 11 June 2018.
Then Tuesday evening, Languedoc was in flip swept away by impressive storms, and in unique Hérault, exactly where the equal of 2 or 3 months of precipitation fell domestically in 1 or 2 several hours.
Wednesday, generalization of lousy climate in the south of the nation
Wednesday late at night and early in the early morninga wave of thunderstorms rose from the Mediterranean, causing significant rains from the Bouches-du-Rhône to the Var.
These storms had been accompanied by sturdy winds, with a gust of 116 km / h recorded in Hyères, placing a monthly wind document.
Wednesday afternoon, Auvergne-Rhône-Alpes and Franche-Comté suffered incredibly violent storms, and in certain the region of Saint-Etienne the place there was a solid hailstorm accompanied by winds of 100 km / h. In Saint-Chamond a gust even achieved 131 km / h. This is the second strongest gust recorded considering that the opening of this station in 2004.
Terrifying movie of the passage of the hailstorm more than Saint-Etienne! Zero visibility, 100 km / h wind … A actual disaster film … https://t.co/MDdd9gI6Cc
– The Temperature Channel (@lachainemeteo) August 17, 2022
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As these storms passed, the equivalent of 3 weeks of rain fell locally in 1 hour, as was the scenario south of Lyon, exactly where floods have been noticed.
Wednesday night, The Languedoc is all over again engulfed by violent storms, with new floods in Montpellier and in the Nîmes region.
These storms rapidly arrived at the Rhone Valley. Between Carpentras, Valence, Montélimar and Avignon, these storms brought about a appreciable urban runoff. Domestically, 50 mm of drinking water fell in 1-2 several hours, corresponding to just about a thirty day period of rain, even though from the beginning of June it almost by no means rained.
Late evening and evening from Wednesday to Thursday, Provence was strike for the 2nd time in the working day by violent storms and in individual Marseille was flooded for the 2nd time. In Cassis, trumpets of h2o poured in excess of the city.
Corsica was strike by a storm this Thursday
With the displacement of the depression toward the Gulf of Genoa, Corsica was strike by a really rigorous storm front this early morning.
As the storm line handed, the winds raged, with a lot of information remaining damaged at more than 200km / h!
Assessment of the stormy gale that swept the #Racing this morning. This kind of violent winds would presently be remarkable in the chilly year. They acquire on a historic character in the heart of an exceptionally sizzling summer months! The warming of the Mediterranean may well have accentuated this phenomenon. pic.twitter.com/bg3jB1MfHr
– The Weather Channel (@lachainemeteo) August 18, 2022
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Summary
The situation in June, a quite stormy thirty day period, has been recurring due to the fact August 15, right after the very long interval of drought and heat wave in July and early August. These lousy weather conditions are not linked to the return of the Atlantic regime, but to drops of chilly that arrive to isolate on their own in the Bay of Biscay, prior to slowly but surely crossing France. A progression slowed down by the presence of large pressures on the Atlantic and central Europe, which points out the violent and stationary character of some storms linked to these minor cellular cold drops, creating violent phenomena like now.
It is in close proximity to the Mediterranean that the prevalence of these storms is the most stunning. In truth, a handful of days back, it was the severe threat of fires that nervous this area most. Nevertheless, between 14 and 18 August, most of the rainfall deficit because late spring has just been cleared in Languedoc and Provence.
A scenario all the a lot more excellent as the Mediterranean episodes normally get started at the conclusion of September. Section of the explanation lies in the warming of the Mediterranean, 5 ° C over its present typical temperature. The prevalence of these chilly drops in southern France may perhaps have produced a incredibly considerable latent power, growing the intensity and violence of the rains, thunderstorms and winds observed since mid-August.
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