The strong gusts of wind caused by storm Barra began to affect Finistère on Tuesday morning.
France is on the fringes of this phenomenon which mainly affects Ireland.
The rains and the wind will gain ground eastward as the day and evening progress.
Météo France has not triggered orange vigilance (level 3 out of 4) but has placed the Atlantic coast, the Channel and the North Sea in yellow vigilance (level 2 out of 4).
Due to the strong tidal coefficients, a good part of this coastline is also on yellow alert because of the risk of submersive waves.
Dips of up to 7 meters are expected off Finistère.
These waves will propagate until Wednesday along the Atlantic with troughs of up to 6 meters.
/Meteo France
According to the meteorological body, the power of the winds in France is more a "gale" than a storm because the country is on the outskirts of Barra.
He expects gusts "which can exceed 100 km / h between Brittany and Normandy on the exposed coast".
At the start of the day, a gust of 88 km / h was recorded in Finistère, on the island of Ouessant.
Inland, in the same regions then in Hauts-de-France in the evening, the wind will blow between 80 km / h and 90 km / h in gusts in the areas closest to the coast.
The weather channel, for its part, anticipates a little more powerful gusts.
It provides up to 110 km / h on the coasts with peaks at 130 km / h "on the north of Cotentin".
She also warns that it is the evening which is the most delicate period.
In a “very active” trolling sky, it is at this moment that “the gusts could be more violent”.
An “explosive” situation in Ireland
Ireland, it is on the front line facing this storm described as "explosive".
Its pressure in its center has decreased by much more than one hectopascal per hour over the last 24 hours, the threshold used for the concept of the explosiveness of a storm, that is to say with a sudden strengthening making it particularly dangerous. .
Barra has become a veritable "weather bomb" off the Irish coast.
#Storm #Barra hits western Ireland this morning, with the coastline on red alert.
It widened at 961 hPa, losing 45 hPa since yesterday: it is therefore a "meteorological bomb".
We expect gusts of 140 km / h and waves of 8 to 12 m 🌊 pic.twitter.com/DUhfp08KNp
- The Weather Channel (@lachainemeteo) December 7, 2021
The local meteorological services of the Met Éireann have thus extended their red alert to the entire west coast of the country.
In the heart of some cities, gusts of at least 130 km / h are expected.
