Heavy snow will fall in the mountains in the next few days

Unsettled weather in France will continue until the middle of next week. Moist and clean ocean air will allow abundant snow to fall on our massifs. Significant thicknesses will be observed, especially from 1500 m to 1700 m elevation, if the soils temporarily whiten above 1300 m elevation. The highest stations will then benefit from regular plastering with the formation of the first sub-layer for the winter season. In this context, the Pyrenees and the Alps will be best served. The lower massifs will be covered with snow only on their tops.

Credit: Weather Channel

Pyrenees: significant snow cover in perspective!

From this Friday, the flow changes to the west-northwest direction, which is the most favorable context for snowy episodes in the Pyrenees, because the disturbances are permanently blocked in the chain. Abundant rains in the plains turn into snow from an average height of 1400 m. The entire chain is disturbed, but the most significant accumulation is expected in its western part. Melting snow will push this rain-snow line up to 2,200m on Sunday, but quickly drop to 1,300m on Monday and Tuesday.

We are waiting for you 1m and 1.50 from an altitude of 1800 m in the west of the chain from here to Wednesday, and in the eastern part from 50 cm to 1 m, a little less towards the Eastern Pyrenees due to the frequent tramontane that follows the disturbances.

In this context, it will be necessary to be careful of the danger of strong and wet snow avalanches, landslides in valleys and floods in the plains. As for the access roads to the resorts, they become difficult to pass on Monday and Tuesday above 1,500 m, even to cross the passes. Special equipment will be needed, not forgetting that “winter” tires are mandatory from November 1.

Alps: Clearer accumulation next week

The first snow fronts for the Alps passed this week, but with fairly moderate activity and at fairly high altitudes, above 1800 m. This Friday morning, the temperature started to drop and the ground turned white in some places above 1400 m.

Especially on Monday and Tuesday, the Alps will be covered with snow, including the Southern Alps on Monday, as a strong depression passes between Corsica and the Alpes-Maritimes. Thicknesses will be significant and will be common above 1400m, sometimes less. We can expect 50cm to 1m at 1800m for the Northern Alps and 40-60cm for the Southern Alps, depending on the intensity of the return from the east earlier in the week, we can expect more in Mercantur.

This wintry context will not be accompanied by bad weather in the Northern Alps, but for the Southern Alps, which may experience heavy rain below 1300 m, it will be necessary to monitor two days on Monday and Tuesday. As a result, access conditions to stations and crossings will be problematic on Monday and Tuesday due to occasional heavy rain and especially snow above 1,300 m, especially at 1,500 m.

Other massifs: only the top of the highest peaks will have snow

Therefore, the meteorological context promises to be favorable for heavy snowfall above 1400-1500 m on average. Down below, the air mass is not cold enough to form a stable and lasting snowpack, especially with thaw expected late next week. Thus, the peaks of Auvergne and the Jura mountains above 1600 m will be able to whiten from 1300 to 1400 m with winter conditions (wind, cold and snow with icing). Therefore, it only applies to peak regions. 10-20 cm may fall over Monts Dore, Cantal (Auvergne) or Monts Jura with wind-driven snowpack formation. But this snow cover will not be of good quality, it will change a lot with temperature fluctuations and then it will not stay on the ground for a long time.

Does this snow bode well for Christmas?

If the spatulas are itchy, that’s the question you ask yourself, and it’s a crucial question for ski resorts. A month before the school holidays, there was almost no snow in our massifs until today. Therefore, his arrival will be sensational, but may be short-lived. From this point of view, ours long term forecast In France, except for the extreme southern regions around the Mediterranean Sea, December is supposed to be a month without precipitation (rain and snow). Therefore, we can imagine that other snows may occasionally occur in the Pyrenees and the southern Alps. However, further north and in the lower mountains, the absence of snow may extend into December. Therefore, there is a possibility that the next big snow will be only on the eve of the holidays, which happened last year and massifs should have used the snow that fell at the beginning of December.

The good news is still relevant: ours seasonal forecast it implies the return of the rains (hence the snow in the mountains) in January and February.

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