Biarritz, December 9, 2021 GAIZKA IROZ
Météo-France placed the Pyrénées-Atlantiques and Landes on red vigilance on Sunday for flood risks, as well as five departments – Pyrénées-Orientales, Hautes-Pyrénées, Haute-Garonne, Ariège and Pyrénées-Atlantiques – on orange vigilance for risk of flooding. ‘avalanche.
The pluvio-snow episode strengthened on Sunday in the Pyrenean departments with 20 to 40 mm of rain already fallen, and should be more sustained during the night from Sunday to Monday, with rainfall intensities of 10 mm / hour, underlines Météo-France in its latest newsletter.
The episode will continue until Monday afternoon. Subsequently, the trend will be downward in rainfall intensity, except on the east of the range. The rainy episode should not end until Tuesday during the day.
The accumulations of precipitation will become significant over all the Pyrenean departments, four of which were still classified in orange rain-flood vigilance on Sunday afternoon (Pyrénées-Atlantiques, Hautes-Pyrénées, Haute-Garone, Ariège). During the episode (in 48 hours between Sunday and Monday), accumulations of the order of 40 to 80 mm are expected in the plains, 100 to 130 mm on the foothills of the foothills, 150 to 200 mm in the mountains, locally 250 mm.
In the west, this precipitation could cause flooding in the Pyrénées-Atlantiques and the Landes, with a flood of the Gave d’Oloron similar to that of last December in Béarn, said Vigicrues, which classified these two departments in red vigilance for risk of flooding.
At altitude, the five Pyrenean departments, where snow falls from 1,500m, remain classified orange for avalanche risks. Warm weather is expected on Sunday evening, with a rise in the snow-rain limit to 2,200 m above sea level, Météo France added.
Upstream, Météo France kept the department of Gers in orange vigilance for the risk of flooding, just like the departments of North and Aisne, at the other end of the country.