Mont-Blanc
Avalanche Bulletin for Mont-Blanc — covering resorts: Chamonix (Brévent-Flégère), Chamonix (Grands Montets / Argentière), Chamonix (Le Tour-Balme), Vallorcine, Les Houches, Megève, Saint-Gervais-les-Bains, Saint-Nicolas-de-Véroce, Combloux, Les Contamines-Montjoie, La Poya (Chamonix), Les Houches (Chamonix), Les Contamines, Megève/Saint-Gervais, Le Tourchet (Chamonix), Brévent/Flégère (Chamonix), Balme - Vallorcine, Les Grands Montets, Les Chosalets (Chamonix), Les Planards (Chamonix), Aiguille du Midi (Chamonix), Vormaine, Les Houches - Saint-Gervais
Source : Météo-France
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Source: Météo-France
Avalanche risk assessment bulletin
(valid outside of marked and open slopes)
MASSIF: Mont-Blanc
written on Sunday 07 June 2026 at 4 p.m.
Risk assessment for Monday 08 June 2026
LAST BULLETIN OF THE SEASON.
Risk indices: 5 very high - 4 high - 3 considerable - 2 moderate - 1 low -- In black: the most dangerous slopes
Above 3400m moderate risk level, lower down low level.
Naturally triggered avalanche: Wet new snow in the sun.
Skier-triggered release: A few wind slabs in the new snow.
Stability of the snow cover until Monday 08 June evening
Typical avalanche situation :Wind slab
Wet snow
Skier-triggered release:* On north-facing slopes above 3400 m: rare soft slabs in the new snow (10 to 30 cm), fairly easily triggered by a skier. These slabs formed with the W/SW wind on Friday and Saturday. These slabs may also be present on south-facing slopes above 4000 m, where the new snow has not yet become wet. Size 1 (small), rarely 2 (medium). * Monday evening above 3400 m: a few wind slabs forming during snowfall. Thin slabs (10 cm), easily triggered by a skier. These slabs are formed by the strong W wind. Size 1, rarely 2.* Above 2800 m: wet new snow may sluff under skis in the afternoon. Size 1. Naturally triggered avalanche:* Above 2800 m, mainly on north-facing slopes: a few snowballs / small wet new snow avalanches as solar radiation increases, especially near rocks/cliffs. Size 1.
Snow quality
Snow conditions: For the season, snow conditions are below average. Skiing is possible above 2300 m on North slopes. Snow quality Monday: Below 2800 m, Firn snow on all aspects, slight night refreezing above 2500 m. The snow becomes wet quickly in the morning. Between 2800 m and 3400 m: still a bit of heavy new snow on a hard base. Crusted snow at the start of the day, thawing during the morning. Above 3400 m on North slopes and 4000 m on South slopes: 10 to 15 cm of new snow, fairly light, not yet very wet. Wind slab near ridges and summits. Monday evening above 3400 m: 5-10 cm of snow brought by showers. Snow often wind-affected.
Weather overview for Monday 08 June
| night | morning | afternoon | evening | |
|---|---|---|---|---|
| Voile nuageux s'épaississant en journée. Averses localement orageuses en soirée. Températures à 2000 m : 8/16°C, à 4000 m : -3/-1°C. | ||||
| Rain-Snow | - | - | 3200m | 3200m |
| Iso 0°C | 3700 m | 3700 m | 3600 m | 3600 m |
| Wind 2000 m | 20 km/h | 20 km/h | 25 km/h | 40 km/h |
| Wind 4000 m | 30 km/h | 30 km/h | 50 km/h | 50 km/h |
Off-piste snow depth
Precipitation at 1800 m
Trend for Tuesday 09 June
Risk index moderate
A few showers in the morning, many clouds. A little fresh snow above 3000 m. No change in the risk.
Snow-weather conditions for the last 7 days
Last 7 days
| Mon. 01/06 | Tue. 02/06 | Wed. 03/06 | Thu. 04/06 | Fri. 05/06 | Sat. 06/06 | Sun. 07/06 | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | |
| Weather | ||||||||||||||||||||||||||||
| Wind (km/h) at 4000m | 40 | 60 | 40 | 40 | 50 | 60 | 90 | 90 | 60 | 50 | 40 | 35 | 40 | 60 | 50 | 30 | 35 | 25 | 25 | 35 | 45 | 50 | 50 | 50 | 50 | 40 | 25 | 20 |
| Wind (km/h) at 2000m | 15 | 15 | 15 | 10 | 30 | 40 | 70 | 40 | 15 | 10 | 5 | 10 | 15 | 15 | 15 | 20 | 15 | 10 | 15 | 10 | 10 | 25 | 30 | 25 | 20 | 15 | 10 | 15 |
Iso 0°CRain-snow limit | ||||||||||||||||||||||||||||
Altitude (m) 4000 3200 2400 1600 800 0 | ||||||||||||||||||||||||||||
| Mon. 01/06 | Tue. 02/06 | Wed. 03/06 | Thu. 04/06 | Fri. 05/06 | Sat. 06/06 | Sun. 07/06 | ||||||||||||||||||||||
Fresh snow (6h) | 0 cm | |||||||||||||||||||||||||||
| Avalanche Risk | ||||||||||||||||||||||||||||
Snow cover North and South at 1500m··· 2000m- - - 2500m | ||||||||||||||||||||||||||||
Total snow depth (cm) 160 120 80 40 0 | ||||||||||||||||||||||||||||
| Mon. 01/06 | Tue. 02/06 | Wed. 03/06 | Thu. 04/06 | Fri. 05/06 | Sat. 06/06 | Sun. 07/06 | ||||||||||||||||||||||
Snow limit - North face Snow limit - South face | ||||||||||||||||||||||||||||
Snow limit (m) 3000 2700 2400 2100 1800 1500 1200 900 600 300 0 | ||||||||||||||||||||||||||||
| Mon. 01/06 | Tue. 02/06 | Wed. 03/06 | Thu. 04/06 | Fri. 05/06 | Sat. 06/06 | Sun. 07/06 | ||||||||||||||||||||||
| Iso 0°C | RSL | Weather at 1800m |
Wind at 2000m |
Wind at 4000m |
||
|---|---|---|---|---|---|---|
| Mon. 01/06 | 03h | 3 500 | 3 000 | 15 | 40 | |
| 09h | 3 500 | - | 15 | 60 | ||
| 15h | 4 000 | - | 15 | 40 | ||
| 21h | 4 000 | - | 10 | 40 | ||
| Tue. 02/06 | 03h | 3 600 | - | 30 | 50 | |
| 09h | 3 400 | - | 40 | 60 | ||
| 15h | 3 100 | 2 800 | 70 | 90 | ||
| 21h | 2 900 | 2 500 | 40 | 90 | ||
| Wed. 03/06 | 03h | 2 500 | 2 200 | 15 | 60 | |
| 09h | 3 000 | 2 200 | 10 | 50 | ||
| 15h | 3 400 | - | 5 | 40 | ||
| 21h | 3 900 | - | 10 | 35 | ||
| Thu. 04/06 | 03h | 3 900 | - | 15 | 40 | |
| 09h | 3 400 | - | 15 | 60 | ||
| 15h | 2 500 | 2 200 | 15 | 50 | ||
| 21h | 2 300 | 2 100 | 20 | 30 | ||
| Fri. 05/06 | 03h | 2 700 | - | 15 | 35 | |
| 09h | 2 700 | - | 10 | 25 | ||
| 15h | 3 000 | - | 15 | 25 | ||
| 21h | 3 300 | - | 10 | 35 | ||
| Sat. 06/06 | 03h | 3 400 | - | 10 | 45 | |
| 09h | 3 300 | - | 25 | 50 | ||
| 15h | 3 300 | - | 30 | 50 | ||
| 21h | 3 300 | - | 25 | 50 | ||
| Sun. 07/06 | 03h | 3 400 | - | 20 | 50 | |
| 09h | 3 700 | - | 15 | 40 | ||
| 15h | 3 700 | - | 10 | 25 | ||
| 21h | 3 800 | - | 15 | 20 | ||
| Avalanche risk |
Snow limit | Snow depth at 2000m |
Fresh snow at 1800m |
|||
| Mon. 01/06 | N : 2 200 m S : 2 500 m | N : 0 cm S : 0 cm | 0 cm | |||
| Tue. 02/06 | N : 2 200 m S : 2 500 m | N : 0 cm S : 0 cm | 0 cm | |||
| Wed. 03/06 | N : 2 200 m S : 2 400 m | N : 0 cm S : 0 cm | 0 cm | |||
| Thu. 04/06 | N : 2 200 m S : 2 400 m | N : 0 cm S : 0 cm | 0 cm | |||
| Fri. 05/06 | N : 2 200 m S : 2 400 m | N : 0 cm S : 0 cm | 0 cm | |||
| Sat. 06/06 | N : 2 200 m S : 2 400 m | N : 0 cm S : 0 cm | 0 cm | |||
| Sun. 07/06 | N : 2 200 m S : 2 600 m | N : 0 cm S : 0 cm | ||||
| French Term | English Term | Definition | Source |
|---|---|---|---|
| Départ spontané | Naturally triggered avalanche | Avalanche not caused by external forces, e.g. snowfall or loss in firmness due to weather conditions. | European Avalanche Warning Services |
| déclenchable | Skier-triggered release | An avalanche caused by the weight of a person (skier, snowboarder, hiker) or by explosives. The additional load collapses a weak layer, causing the slab above to fracture and slide. | AvalancheClarity Static Glossary |
| Ubac | North-facing slopes | The shady, north-facing side of a mountain. Snow persists longer and weak layers are better preserved on ubac slopes. | AvalancheClarity Static Glossary |
| Adret | South-facing slopes | The sunny, south-facing side of a mountain. Snow becomes wet more quickly due to solar radiation. | AvalancheClarity Static Glossary |
| Enneigement | Snow conditions | The depth and distribution of snow on the ground across a mountain range. Varies with elevation, aspect, and snowfall history. | AvalancheClarity Static Glossary |
| ensoleillement | solar radiation | Light and heat energy from the sun. Much of this is in the Ultraviolet part of the electromagnetic spectrum. | Avalanche Center (US) |
| marqué | considerable | Snowpack is moderately to poorly bonded on many steep slopes. Triggering is possible even from low additional loads, particularly on indicated steep slopes. In certain situations, some large natural avalanches are possible. | European Avalanche Warning Services |
| Regel | Refreezing | Overnight freezing of the snow surface forming a hard crust. Refreezing temporarily stabilises the snowpack but strength decreases with daytime warming. | AvalancheClarity Static Glossary |
| Manteau neigeux | Snow cover | Snow deposited on the ground in a multiplicity of layers. | European Avalanche Warning Services |
| Hauteur de neige | Snow depth | Thickness of the snowpack measured vertically. | European Avalanche Warning Services |
| Neige ventée | Wind slabs | The wind-drifted snow problem is related to wind-drifted snow. The transported snow is typically packed on leeward sides into gullies, bowls and behind ridgelines or other wind-sheltered locations. Also commonly known as “windslab”. The problem is less widespread distributed than the new snow problem. | European Avalanche Warning Services |
| Stabilité | Stability | The strength of a snowpack to withstand internal and external disturbances.Stability is determined by firmness vs. stress inside a snow layer. | European Avalanche Warning Services |
| très fort | very high | Snowpack is generally unstable. Many large natural avalanches are expected, even on moderately steep terrain. Extremely dangerous conditions — avoid all avalanche terrain. | European Avalanche Warning Services |
| Neige fraîche | New snow | The new snow problem is related to current or recent snowfall. The additional loading on the existing snowpack or a lack of cohesion in the newly fallen snow can cause avalanche activity. The problem is widely present, often in all aspects and lasts usually until a few days after the snowfall event. | European Avalanche Warning Services |
| Neige humide | Wet snow | The wet snow problem is related to the weakening of the snowpack due to the presence of liquid water. Water infiltrates the snowpack due to high radiation impact (sunshine) which leads to melt or rain (advecting energy into the snowpack leading to melt as well). | European Avalanche Warning Services |
| limité | moderate | Snowpack is moderately well bonded on some steep slopes, otherwise generally well bonded. Triggering is possible with high additional loads, particularly on indicated steep slopes. Large natural avalanches unlikely. | European Avalanche Warning Services |
| mouillée | very wet | IACS/UNESCO | |
| Exposition | Aspects | Direction in which a slope faces as indicated by compass direction of the fall line; i.e. a north slope faces in a northerly direction. | European Avalanche Warning Services |
| moyen | medium | IACS/UNESCO | |
| Arête | Ridges | Narrow crest line of a mountain. | European Avalanche Warning Services |
| Coulée | Sluff | A small downhill movement of snow. | American Meteorological Society |
| Névé | Firn | Snow accumulated in recent years, mostly atop glaciers, intensely metamorphosed and denser because of melting and refreezing, as well as from pressures of overlying snow masses. | European Avalanche Warning Services |
| Risque | Risk | Likelihood of occurrence combines mathematical probability, risk exposure and possible damages. | European Avalanche Warning Services |
| dur | hard | IACS/UNESCO | |
| tendre | soft | IACS/UNESCO | |
| faible | low | Snowpack is generally well bonded and stable. Triggering is generally possible only from high additional loads in a few isolated steep extreme terrain features. Only small natural avalanches possible. | European Avalanche Warning Services |
Bulletin d'estimation du risque d'avalanche
(valable en dehors des pistes balisées et ouvertes)
MASSIF : Mont-Blanc
rédigé le dimanche 07 juin 2026 à 16 h.
Estimation des risques pour le lundi 08 juin 2026
DERNIER BULLETIN DE LA SAISON.
Indices de risque : 5 très fort - 4 fort - 3 marqué - 2 limité - 1 faible -- En noir : les pentes les plus dangereuses
Au-dessus de 3400m indice de risque limité, plus bas indice faible.
Départs spontanés : Neige récente humide au soleil.
Déclenchements skieurs : Quelques plaques à vent dans la neige récente.
Stabilité du manteau neigeux jusqu'au lundi 08 juin au soir
Situation avalancheuse typique :Neige ventée
Neige humide
Déclenchements provoqués :* Dans les ubacs au-dessus de 3400 m : rares plaques friables dans la neige récente (10 à 30 cm), assez facilement déclenchables par un skieur. Ces plaques se sont formées avec le vent de W/SW vendredi et samedi. Ces plaques peuvent également être présentes dans les adrets au-dessus de 4000 m, là où la neige récente n'a pas encore été humidifiée. Taille 1 (petite), rarement 2 (moyenne). * Lundi soir au-dessus de 3400 m : quelques plaques à vent forment lors des chutes de neige. Plaques peu épaisses (10 cm), facilement déclenchables par un skieur. Ces plaques sont formées par le fort vent d'W. Taille 1, rarement 2.* Au-dessus de 2800 m : de la neige récente humide peut couler sous les skis l'après-midi. Taille 1.Départs spontanés :* Au-dessus de 2800 m, principalement dans les ubacs : quelques boulettes / petites avalanches de neige humide récente au fil de l'ensoleillement, notamment proche des rochers/falaises. Taille 1.
Qualité de la neige
Enneigement : Pour la saison, l’enneigement est déficitaire. On peut chausser les skis au-dessus de 2300 m en Nord.Qualité de la neige lundi :En dessous de 2800 m, Neige de névé en tous versants, léger regel nocturne au-dessus de 2500 m. La neige s'humidifie rapidement en matinée.Entre 2800 m et 3400 m : encore un peu de neige récente lourde sur fond dur. Neige croutée en début de journée, dégelant en cours de matinée. Au-dessus de 3400 en Nord et 4000 m en Sud : 10 à 15 cm de neige récente, assez légère, encore peu humidifiée. Neige ventée proche des crêtes et sommets. Lundi soir au-dessus de 3400 m : 5-10 cm de neige apportés par les averses. Neige souvent travaillée par le vent.
Aperçu météo pour le lundi 08 juin
| nuit | matin | après-midi | soir | |
|---|---|---|---|---|
| Voile nuageux s'épaississant en journée. Averses localement orageuses en soirée. Températures à 2000 m : 8/16°C, à 4000 m : -3/-1°C. | ||||
| Pluie-Neige | - | - | 3200m | 3200m |
| Iso 0°C | 3700 m | 3700 m | 3600 m | 3600 m |
| Vent 2000 m | 20 km/h | 20 km/h | 25 km/h | 40 km/h |
| Vent 4000 m | 30 km/h | 30 km/h | 50 km/h | 50 km/h |
Epaisseur de neige hors-piste
Précipitations à 1800 m
Tendance du mardi 09 juin
Indice de risque limité
Quelques averses en matinée, nombreux nuages. Un peu de neige fraiche au-dessus de 3000 m. Pas d'évolution du risque.
Conditions nivo-météo des 7 derniers jours
Les 7 derniers jours
| lun. 01/06 | mar. 02/06 | mer. 03/06 | jeu. 04/06 | ven. 05/06 | sam. 06/06 | dim. 07/06 | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | 03h | 09h | 15h | 21h | |
| Météo | ||||||||||||||||||||||||||||
| Vent (km/h) à 4000m | 40 | 60 | 40 | 40 | 50 | 60 | 90 | 90 | 60 | 50 | 40 | 35 | 40 | 60 | 50 | 30 | 35 | 25 | 25 | 35 | 45 | 50 | 50 | 50 | 50 | 40 | 25 | 20 |
| Vent (km/h) à 2000m | 15 | 15 | 15 | 10 | 30 | 40 | 70 | 40 | 15 | 10 | 5 | 10 | 15 | 15 | 15 | 20 | 15 | 10 | 15 | 10 | 10 | 25 | 30 | 25 | 20 | 15 | 10 | 15 |
Iso 0°CLimite pluie-neige | ||||||||||||||||||||||||||||
Altitude en m 4000 3200 2400 1600 800 0 | ||||||||||||||||||||||||||||
| lun. 01/06 | mar. 02/06 | mer. 03/06 | jeu. 04/06 | ven. 05/06 | sam. 06/06 | dim. 07/06 | ||||||||||||||||||||||
Neige fraîche (6h) | 0 cm | |||||||||||||||||||||||||||
| Risque d'Avalanche | ||||||||||||||||||||||||||||
Enneigement versant Nord et Sud à 1500m··· 2000m- - - 2500m | ||||||||||||||||||||||||||||
Hauteur totale de neige (cm) 160 120 80 40 0 | ||||||||||||||||||||||||||||
| lun. 01/06 | mar. 02/06 | mer. 03/06 | jeu. 04/06 | ven. 05/06 | sam. 06/06 | dim. 07/06 | ||||||||||||||||||||||
Limite de l'enneigement - Versant Nord Limite de l'enneigement - Versant Sud | ||||||||||||||||||||||||||||
Limite d'enneigement (m) 3000 2700 2400 2100 1800 1500 1200 900 600 300 0 | ||||||||||||||||||||||||||||
| lun. 01/06 | mar. 02/06 | mer. 03/06 | jeu. 04/06 | ven. 05/06 | sam. 06/06 | dim. 07/06 | ||||||||||||||||||||||
| Iso 0°C | LPN | Météo à 1800m |
Vent à 2000m |
Vent à 4000m |
||
|---|---|---|---|---|---|---|
| lun. 01/06 | 03h | 3 500 | 3 000 | 15 | 40 | |
| 09h | 3 500 | - | 15 | 60 | ||
| 15h | 4 000 | - | 15 | 40 | ||
| 21h | 4 000 | - | 10 | 40 | ||
| mar. 02/06 | 03h | 3 600 | - | 30 | 50 | |
| 09h | 3 400 | - | 40 | 60 | ||
| 15h | 3 100 | 2 800 | 70 | 90 | ||
| 21h | 2 900 | 2 500 | 40 | 90 | ||
| mer. 03/06 | 03h | 2 500 | 2 200 | 15 | 60 | |
| 09h | 3 000 | 2 200 | 10 | 50 | ||
| 15h | 3 400 | - | 5 | 40 | ||
| 21h | 3 900 | - | 10 | 35 | ||
| jeu. 04/06 | 03h | 3 900 | - | 15 | 40 | |
| 09h | 3 400 | - | 15 | 60 | ||
| 15h | 2 500 | 2 200 | 15 | 50 | ||
| 21h | 2 300 | 2 100 | 20 | 30 | ||
| ven. 05/06 | 03h | 2 700 | - | 15 | 35 | |
| 09h | 2 700 | - | 10 | 25 | ||
| 15h | 3 000 | - | 15 | 25 | ||
| 21h | 3 300 | - | 10 | 35 | ||
| sam. 06/06 | 03h | 3 400 | - | 10 | 45 | |
| 09h | 3 300 | - | 25 | 50 | ||
| 15h | 3 300 | - | 30 | 50 | ||
| 21h | 3 300 | - | 25 | 50 | ||
| dim. 07/06 | 03h | 3 400 | - | 20 | 50 | |
| 09h | 3 700 | - | 15 | 40 | ||
| 15h | 3 700 | - | 10 | 25 | ||
| 21h | 3 800 | - | 15 | 20 | ||
| Risque avalanche |
Limite enneigement | Enneigement à 2000m |
Neige fraîche à 1800m |
|||
| lun. 01/06 | N : 2 200 m S : 2 500 m | N : 0 cm S : 0 cm | 0 cm | |||
| mar. 02/06 | N : 2 200 m S : 2 500 m | N : 0 cm S : 0 cm | 0 cm | |||
| mer. 03/06 | N : 2 200 m S : 2 400 m | N : 0 cm S : 0 cm | 0 cm | |||
| jeu. 04/06 | N : 2 200 m S : 2 400 m | N : 0 cm S : 0 cm | 0 cm | |||
| ven. 05/06 | N : 2 200 m S : 2 400 m | N : 0 cm S : 0 cm | 0 cm | |||
| sam. 06/06 | N : 2 200 m S : 2 400 m | N : 0 cm S : 0 cm | 0 cm | |||
| dim. 07/06 | N : 2 200 m S : 2 600 m | N : 0 cm S : 0 cm | ||||