AlpeSnowAlpeSnow
Savoie · Haute-Savoie · northern Isère

Snow forecast by massif: totals from 1,500 to 3,000 m

Pick an altitude and a period: the map and table show the fresh snow expected in each of the twelve massifs of Savoie, Haute-Savoie and northern Isère, with the lowest forecast rain-snow line.

In short. For each snow massif of the Northern French Alps, this page gives the snowfall total forecast by the Open-Meteo model over the next 24, 48 and 72 hours at 1,500, 2,000, 2,500 and 3,000 m, with a range drawn from the 40 scenarios of the ICON ensemble model, recalculated every hour. These are estimates at a representative point of each massif, not measurements or an avalanche bulletin.

Loading data…

Understanding the conditions

How to read the map and table

Each marker sits in the heart of a massif and shows, in centimetres, the fresh snow the model forecasts at the chosen altitude over the chosen period. The table gives the four altitudes side by side, with the range under each total, a day-by-day breakdown and the lowest rain-snow line of the period. Massifs are sorted from the snowiest to the least snowy.

Why four altitudes

In the mountains a few hundred metres change everything: the same shower can fall as rain at 1,500 m and as snow at 2,500 m, and the biggest totals often fall above 3,000 m. Comparing the columns shows where the snow line sits and which resorts or routes are affected. A column stays empty when the massif does not reach that altitude (3,000 m only exists for Mont-Blanc, Vanoise, Haute-Tarentaise, Maurienne, Haute-Maurienne and Grandes-Rousses).

A range rather than a single figure

A snow forecast is uncertain, especially two or three days ahead. Under each total, the range runs from lowest to highest between the main figure and 8 in 10 of the 40 ICON ensemble scenarios, calculated the same way. A narrow range (12–15) means the scenarios agree; a wide one (2–25) warns that a small change in track or temperature can change everything.

Forecast snow, snow on the ground, avalanche risk

A forecast snowfall total is not the snow depth on the ground: snow settles, melts or is moved by the wind. For measured depths, see Météo-France observation posts; for avalanche risk, only Météo-France’s avalanche risk bulletin (BRA) is authoritative.

Observed snow, post by post

Where the figures come from

One point per massif, queried at each altitude in a single request to the Open-Meteo model. The snow for each hour is the higher of the model’s snowfall and the precipitation falling at sub-zero or near-zero temperatures (1 mm of water for 0.7 cm of snow), as everywhere on the site. Totals are recalculated every hour.

Sources and methodology
Your questions

Before you go

Where will the most snow fall in the next 48 hours?

According to the Open-Meteo model read on 9 October at 17:31, at 2,000 m the highest totals over the next 48 hours are expected in Chablais (0 cm), Aravis (0 cm), Mont-Blanc (0 cm); the lowest rain-snow line of the period is around 1,750 m. These are model estimates, recalculated every hour, not measurements.

Are these totals measurements?

No. They are Open-Meteo model forecasts at a representative point of each massif, at the stated altitude. Actual amounts vary with aspect, terrain and wind.

Why are some columns empty?

Savoie Snow does not show a forecast for an altitude the massif does not reach: the Chartreuse, Bauges and Chablais top out below 2,500 m, and the Aravis, Beaufortain and Belledonne below 3,000 m.

What does the range under the total mean?

It runs from lowest to highest between the main figure and 8 in 10 of the ICON ensemble model’s 40 scenarios. The wider it is, the more uncertain the forecast.

Does this page replace the avalanche bulletin?

No. Before any trip into snowy mountains, check Météo-France’s avalanche risk bulletin for the massif concerned.

Sources and method

Text of this page last revised on . This date says nothing about how recent the images or data are: the webcams are supplied by the credited operators and their timestamp shows when the image was taken; model forecasts and official reports are separate pieces of information, each with its own time.

Savoie Snow · Observe, understand, prepare.