After Ciara and Inés, a new storm is brewing over the North Atlantic. Dennis, that's his name, is set to widen on Sunday in the north of Scotland to extend from Scandinavia to France. The north of France will once again be particularly affected by the strongest winds on Sunday with stormy gusts which will locally reach 120 to 130 km / h on the exposed headlands and coasts, between 90 and 100 km / h in the land at north of the Loire.
No risk of submersion
Unlike the Ciara storm which affected many regions, the Dennis storm will limit its influence to the regions north of the Loire. It will also be of long duration (between 12 and 24 hours) but will bring winds a notch below the Ciara storm of last Sunday. The very low tidal coefficients (58 and 52) will limit the risk of submersion at the time of high tide, especially since the strongest winds will blow especially at times of high seas.
This storm will also be accompanied by abundant rains in Brittany. Cumulative amounts of 30 to 50 mm are expected between Saturday evening and Monday on Finistère, which will correspond to 3 weeks of precipitation and to react to many watercourses (Aulne, Steïr, Jet, Odet ) with the risk of occasional floods and floods.
But the low tides will allow faster flow of these river waters to the sea.