pyrenees

France is continuing to grapple with the effects of Storm Oriana, with significant rainfall and snowmelt raising concerns about flooding and avalanches across multiple regions. While the situation remains largely unchanged from Sunday, February 15th, authorities are closely monitoring the Pyrénées mountains, where increased precipitation and rising temperatures are creating hazardous conditions. The focus on flood risk remains concentrated in southwestern France, but the expanding threat now includes avalanche danger in mountainous areas.

Two departments – Gironde and Lot-et-Garonne – remain at the highest level of alert, designated “red” for flood risk. A total of 22 departments are currently under orange alerts as of Monday, February 16th, encompassing warnings for floods, snow, ice, and avalanches, according to Météo France. This represents a slight decrease from the 23 departments under orange alert on Sunday, but the shift in focus to the Pyrénées highlights the evolving nature of the storm’s impact.

Météo France emphasizes that a significant rainfall event combined with notable snowmelt necessitates vigilance. Forecasts for the Pyrénées predict rainfall accumulations of 30 to 50 mm, with localized areas potentially receiving 70 to 100 mm at higher elevations. Adding to this, the melting snow is estimated to contribute an additional 30 mm of water equivalent, potentially reaching 40-50 mm in the Ariège department. This combined effect significantly increases the risk of overflowing rivers and streams.

Four departments in the Pyrénées – Pyrénées-Atlantiques, Hautes-Pyrénées, Haute-Garonne, and Ariège – have been placed under orange alert for heavy rain and flooding due to the increased avalanche risk. The avalanche risk, particularly from wet snow, is considered significant, and could impact roadways and mountain infrastructure.

The avalanche activity expected in the Pyrénées is a recurring phenomenon, occurring roughly every two to three years, according to Météo France. While the wet snow avalanche event hadn’t fully begun as of Sunday afternoon, conditions were ripe for development. Prior to the current system, the Pyrénées experienced cold and windy snowfall between February 12th and 14th. A temporary lull on Sunday morning was expected to be followed by a new, active weather disturbance.

Avalanche Risk in the Alps

The rising freezing level, expected to reach 2,000 meters by late afternoon or evening, is contributing to the heightened avalanche risk. Wet snow avalanches are anticipated to impact roadways at lower elevations, while larger powder avalanches could threaten infrastructure at higher altitudes. The Alps are also facing an elevated avalanche risk on Monday.

Météo France forecasts 50 to 70 cm of fresh snow above 1,500 meters across much of Haute-Savoie, Savoie, and Isère, with localized accumulations potentially reaching 90 cm overnight Sunday and throughout Monday. This substantial snowfall, combined with the ongoing precipitation, is expected to trigger significant avalanche activity, potentially impacting roads and mountain facilities.

Recent Storm Activity

Storm Oriana has been impacting France since the beginning of the weekend, causing deaths and widespread power outages. According to reporting from February 15th, Storm Nils previously caused deaths, major flooding, and mass power cuts in France, demonstrating the potential severity of these weather events. Storm Nils caused significant disruption earlier this month.

Authorities are urging residents in affected areas to stay informed and exercise caution. The situation remains dynamic, and further updates will be provided by Météo France as the storm progresses. The focus will remain on monitoring river levels, snowpack stability, and potential impacts to transportation networks.

Looking ahead, continued monitoring of the weather systems impacting France will be crucial. The combination of rainfall, snowmelt, and potential for further snowfall necessitates ongoing vigilance and preparedness. Share your experiences and stay safe.