Weather: with the violent storms expected this Tuesday, why should we fear very virul rainy episodes

the essential The arrival of violent storms this Tuesday, August 16 suggests a significant risk of flooding in France. In addition, a Mediterranean episode is feared in Hérault and Gard this Wednesday. France is barely emerging from a third wave of heat wave that it could soon experience… floods. This is essentially what several forecasters fear at the start of the week, while stormy episodes are expected from this Tuesday in France. \u2935\ufe0f Below are the expected accumulations \ud83c\udf27\ufe0f\u2935\ufe0f
\u26a0\ufe0fIt is important to specify: these welcome bad weather will in no way make up for the marked drought, as the deficit accumulated this summer is significant (the soil moisture index is at an absolute low level. ) pic.twitter.com/Kq63vdTxXL — Météo-France (@meteofrance) August 12, 2022 Indeed, thunderstorms, sometimes violent, should strike this Tuesday August 16 in several regions of France. In the front line, the Pyrenees, the south of the Alps or even the Corsican mountains. On the rain side, precipitation is expected between the Belgian border and Alsace. “Significant rain accumulations” While significant deterioration is expected between the south-west and the Massif Central tomorrow, the risk of flooding is becoming more and more present. “Towards Roussillon, the Cévennes, we expect significant rainfall accumulations, locally more than 100 liters of water per m², on very dry and impermeable soils. The risk of flooding is expected to be significant in these regions. Mediterranean, and these sometimes heavy stormy rains will continue for Wednesday in the South-East”, analyzes Marc Hay, weather journalist for BFMTV. Especially since the state of the soil suggests violent flooding. Indeed, bruised by repeated heat waves, French soils have lost their absorption capacity. “After a period of drought, dry soils are no longer able to properly absorb rainfall and this can cause floods, floods and landslides”, explains the Water Information Center. Mediterranean episode In addition, the departments of Hérault and Gard could soon face a Mediterranean episode, with “a risk of extremely rainy and virulent stationary storms”, warns Météo Paris. Indeed, thunderstorms will strike in the southwest and should progress towards the southeast from this Tuesday, August 16th. They could hit the Aude at the end of the day before turning to the Hérault then the Gard in the night from Tuesday to Wednesday. Virulent episodes in the Cévennes are also expected, especially around the Mediterranean. In question: the phenomenon of “marine heat wave” that the Mediterranean Sea undergoes, where the temperature has sometimes climbed up to 6.5°C above normal for the season. The next few days promise to be very wet on the Cévennes reliefs with a notable rainy-stormy episode expected.
Small #Thread? in operational forecasting mode\ud83d\udc47\ud83d\udc47 pic.twitter.com/EsNvtz6z4Z— Ludovic Bernede (@LBMeteo) August 15, 2022 Warm air from the sea, coming into contact with the air colder located at altitude, could thus favor this type of episode of heavy rains.