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Friday January 24 at 0:00 au
Saturday January 25 at 0:00
Situation
Alongside the passage of violent storm Éowyn over the British Isles this Friday, the wind is strengthening and blowing in a classic gale for the season over the north-west of France. Waves of 6 to 7 m arrive on the Breton coast but the very low tidal coefficients (31) will prevent coastal submergence.
Winds will blow between 100 and 110 km/h on the most exposed capes, and generally 70 to 80 km/h inland.
On the other hand, the parade of disturbances over the coming days will cause numerous periods of marked rain in many regions, which could lead to reactions in rivers with a new risk of overflowing. This special press release takes into account all these parameters, which will be subject to change.
Observation
This Thursday, depression Eowyn is located in the middle of the Atlantic Ocean with a pressure of 975 hPa. The arrival of cold air from the American continent will boost this cyclogenesis, and the pressure will only decrease as it progresses towards Ireland. It will arrive in West Ireland this Friday morning with an estimated pressure of 940 hPa. Gusts estimated over Ireland will be between 150 and 180 km/h.
Evolution
The north-west of France will only be affected by the passage of the cold front associated with the Éowyn depression. However, as conditions are expected to be very violent in the British Isles, maritime and air traffic may be subject to disruptions (cancellations, delays), requiring you to take all the necessary information for your travels,
In France, as the disturbance passes, the winds will strengthen in a very classic way for this time of year, not presenting a dangerous character.
The winds strengthen on the Breton tip after midnight, particularly between 3 a.m. and 4 a.m. Gusts can reach 100 to 110 km/h on exposed capes. Inland, these gusts will generally be between 70 and 80 km/h, more sustained along the coast. The strong winds weaken quickly at midday over Brittany as they reach Hauts-de-France, blowing especially between noon and 3 p.m. The lull will be quick and general at 4 p.m.
At the same time, the parade of disturbances continues, and new copious rains fall on the northwest quarter of our country. These rains are relatively abundant in 24 hours, but not exceptional. However, they present a new risk of overflows and new floods for the following days because other disturbances will follow.
In a context where the soils remain saturated, despite the last ten days of dry weather, we therefore fear further increases in rivers this weekend and next week.
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