The Manche department once again under weather alert

It's not a day or so since the beginning of January 2025 without sound weather alert in the department of Manche.

Yellow alert

Ce Monday January 6, 2025the Manche prefecture relays on social networks a new newsletter from Météo France which places the Some in “yellow alert for wind until 8 a.m. tomorrow morning, snow-ice from 9 p.m. until 10 a.m. tomorrow, flood at least until tomorrow”.

“Be careful,” calls the prefecture. While the bulletins established that same Monday an “end of Orange Wind vigilance”. With the general situation, described by Météo France:

The depression named Floriane caused a brief but clear strengthening of the wind in the first part of the day on Monday. Notable observations: gusts frequently between 70 and 90 km/h were noted, occasionally 100 km/h in the departments placed on orange alert.

Beware of the risk of flooding

La Vire is in fact one of the 53 “sections” placed on yellow alert in France by Vigicrues.

“The accumulations observed last weekend (January 4 and 5) caused the water levels in the section of the Vire to react. The precipitation expected during the day (January 6) will maintain this rise in water levels. Overflows may be observed in the next 24 hours on the section (particularly to the right of Gourfaleur station). Winter flood, classic in this season”, comments the national information service on the risk of floods Vigicrues.

On the Vire section, graphic forecasts were produced at the stations: at Saint-Lô (Pont de Gourfaleur, production date 01/06/2025 at 08:34 a.m., deadline 01/07/2025 at 10 a.m.), the deadlines and Forecast trends (heights and/or flows) vary depending on the stations.

“Very high” water levels

It is the only river in the Manche department which is subject to this type of alert. But there are 22 observation stations for monitoring surface water (watercourses) for the Manche department and referenced on “Drought Info”.

As of January 5, 2025, all are reported at a “very high level”. Thus, a watercourse height of 1.17 meters is measured on the Divette, in Cherbourg-Octeville, with a flow rate of 9.04 cubic meters per second (m³/s), where it was at 3.31 m³/s the day before.

Be attentive and follow the evolution of the sky here. And for flood risks: vigricrues

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