The department of Morbihan will be placed in Orange Rain-Inondation Orange as early as 6 p.m. Friday.
In question: the passage of the Eowyn storm which strikes Ireland and the United Kingdom hard.
With concern: important precipitation on soils already saturated with water.
Storm notice in the northwest of France. Météo-France will place, Friday, January 24 from 6 p.m., the department of Morbihan on orange vigilance for rain-round. The consequence of the passage of the Eowyn storm which strikes Ireland hard – with recorded recorded gusts – and the United Kingdom.
In France, on Brittany, the phenomenon “Bring lasting and temporarily sustained rains” especially on Friday evening. If the episode is “Usual for the season”Pointe Météo-France, the organization issues a particular vigilance due “saturated floors “.
Too much rain in 2024
If vigilance is in order, it is because in Brittany, precipitation has been important in recent months. France is also released by a year 2024 in rains in approximately 15%, allowing it to rank among the most rainy years since 1959, according to the annual assessment of Météo-France. Consequence: “The floors have remained humid than normal for eight months, unheard of for over thirty years”.
A humidity that has never really been evacuated. “We had an extremely watered 2024 year, and as we are still in the winter, it is very complicated for the floors to evaporate well and to evacuate the water well”details Tristan AMM, forecaster in Météo-France. In the northwest of France, according to humidity cards from the body’s soils, they are all in excess at the start of 2025, while the levels of the water tables display high with very high, According to the latest assessment of the geological and mining research office (BRGM), published on January 15 (new window)no longer allowing any evacuation of precipitation, which promises to be locally intense with Ewoyn.
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“The floors that have received a lot of water can no longer absorb and let it pass, causing more floods and other phenomena such as flows or Flugs“Tristan AMM point which takes an example: “It’s a bit like a sponge that you throat and when you try to pour tap water on it, it doesn’t absorb any more, the water does not flow”. Hence the particular vigilance emitted by Météo-France in the northwest of France with the Eowyn storm.
Runoff floods
Especially since, points to the site of the Government Government (new window)these soils saturated with water can promote floods by runoff, a risk that is still little measured in France while these floods occur when important rains occur and they cannot or more infiltrate the soil. If they affect in particular urban areas where soils are artificialized, they can occur on any territory, including areas far from any rivers.
According to the latest forecasts from Météo-France, accumulation of precipitation between 20 and 40 mm are expected during the rainy episode this Friday. “The strongest rains should stop around midnight”said the organization. Orange vigilance could be extended to other departments, including those already placed in yellow “rain-innon” alert, warned the meteorological institute.
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