Météo France has placed the departments of Finistère and Morbihan in orange alert due to heavy rains expected with the passage of storm Dennis in the evening from Saturday until Sunday afternoon.
On the sidelines of the #TempeteDennis which rages on the North Atlantic, #productive rains are planned on # Finistère and #Morbihan: by Sunday evening, expected cumulative amounts of 30 to 60 mm, locally 80 mm (equivalent of 2 even 3 weeks of rain).
"The depression 'Dennis' will cause heavy rain in the northwest of the country, as well as a gale," said the National Forecast Center on Saturday. After a temporary lull in the second part of the night, the rains must "be clearly reinforced by the west as early as Sunday morning before passing by a train in the course of the afternoon".
Wind gusts up to 120 km / h
Cumulative expected over the episode are 30 to 60 millimeters in 24 hours (up to locally 80 mm in 36 hours, amount corresponding overall to a half-month of precipitation for February), adds Météo-France so "these rains are coming on already saturated soils. "
Wind gusts of up to 120 km / h on the coast are also expected. In addition, in a press release, the city of Nantes indicated that "all the parks, gardens and enclosed squares will be closed to the public for the day" on Sunday, due to the passage of the depression.