Bonneval sur Arc
5-day forecast, snow depth & avalanche bulletin
Bonneval sur Arc, located at an altitude of 1800 m, with peaks reaching 3000 m, in the Northern French Alps, benefits from specific alpine weather conditions. This page brings together the 9-day weather forecast for Bonneval sur Arc: four days in detail from Météo-France (minimum and maximum temperatures, expected snowfall, 0°C isotherm), then an outlook through day 9, along with the ski area snow depth. The Northern French Alps avalanche bulletin is also available below. Forecasts are calibrated to the resort's actual altitude; the first four days come from Météo-France models (AROME/ARPEGE), the outlook from a longer-range, less precise model.
Contents
gusts 11 km/h
gusts 17 km/h
gusts 57 km/h
gusts 58 km/h
Forecasts from Météo-France (AROME/ARPEGE models) for the first 4 days, calibrated to the exact resort altitude. The 0°C isotherm is given as a range (min/max over the day) to honestly reflect its variation throughout the day.
Longer-range outlook (ECMWF European model): indicative only, less reliable at this range, and not included in the snowfall total.
Data: Open-Meteo.com (CC BY 4.0), Météo-France AROME/ARPEGE models and ECMWF European model.
Hourly temperature & 0°C isotherm
9-day snowfall forecast
Cumulative forecast: 0 cm at the resort base (1,800 m) and 21 cm at the summit (3,000 m) over the next 4 days (Météo-France forecast). Tuesday, rain on the lower slopes up to about 2,300 m, with snow above. For the following days, the outlook is given as a range and is not included in this total.
base 5-10 cm · summit 30-50 cm
Snow line over the coming days in Bonneval sur Arc
- Tomorrow, midnight to 3am: snow line around 1,800 m, snow down to the resort base.
- Monday, 3am to noon: snow line around 1,800 m, snow down to the resort base.
- Tuesday, 9am to 11pm: snow line around 2,300 m (2,050 m to 2,450 m during the spell), rain at the base, snow higher up.
Snow line: the altitude above which precipitation falls as snow. It is computed hour by hour, during precipitation, from Météo-France temperature and humidity at altitude: it is the altitude where the wet-bulb temperature rises above 1.3°C (the same definition as the German weather service's snowfall line). Météo-France days only, not the longer-range outlook.
Snow depth & slope openings
Snow depth & slope openings
Avalanche bulletin — Haute-Maurienne massif
Valid until: 14 November 2026 18:00
Massif snow conditions
| Altitude | North-facing | South-facing |
|---|---|---|
| 1500 m | 0 cm | 0 cm |
| 2000 m | 0 cm | 0 cm |
| 2500 m | 20 cm | 0 cm |
Snow quality
Au-dessus de 2600m indice de risque limité, plus bas indice faible.
Stability: Hivernal en haute altitude, enneigement modeste plus bas.
Déclenchements provoqués : - Au-dessus de 2600/2800 m, les 10/20 cm de neige récente ont été transportés par le vent. En résultent quelques petites instabilités en neige densifiée plutôt identifiables, encore assez réactives. Ces plaques occasionnent de petites avalanches, taille 1. - Dans les versant Nord au dessus de 2800/3000 m, les couches fragiles persistantes sont encore peu enfouies et donc sollicitables. Cassures généralement 30/40 cm, voire 50 cm dans les secteurs mieux servis ce jeudi, le long de la frontière italienne. L'emprise des plaques est encore limitée par l'enneigement modeste, on s'attend donc surtout à des taille 1, en terrain bien dégagé et lisse on peut atteindre la rare taille 2. - Plus bas que 2800/3000 m, le manteau était humide et a partiellement regelé, neutralisant d'éventuelles instabilités.Départs spontanés : petites purges en terrain raide en versants ensoleillés, seulement au delà de 2600/2800 m où la neige est tombée froide.
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