Haute-Maurienne — Avalanche Forecast

Storm Slab

Above 2600m

Wind Slab

Above 2200m

Persistent Slab

Above 2300m

Problems extracted by AI from bulletin text. May be inaccurate.

New wind-driven instabilities. Triggering by human action: - Above 2700/2800 m, a few new instabilities in wind-transported recent snow. These few small instabilities in loose or wind-compacted snow are maintained by the small snowfalls up to Sunday morning and by a fairly strong southwesterly wind throughout the day. These slabs cause small avalanches, size 1. - On north-facing slopes above 2800/3000 m, the persistent weak layers are still not deeply buried and therefore can be triggered. Breaks generally 30/40 cm, and up to 50 cm in the better snow-covered areas, along the Italian border above the Val de Suze. The extent of the slabs is still limited by the modest snow cover; therefore, size 1 is expected mainly. In well-exposed, smooth terrain, the rare size 2 can be reached. - Below 2800/3000 m, the snowpack is thin and any instabilities are modest. Natural releases: - Rare small releases of wind-driven snow near ridgelines and slope breaks cannot be ruled out, in the north sector above 2700 m over the course of the day, with wind transport and the thickening of the slabs. Small avalanches, size 1.- Rare small sluffs in steep, sunny terrain during the day.

Snow cover: the dusting of the alpine meadows only poorly conceals the snow-cover deficit, except in high mountain areas with a slightly more wintry appearance. Skiable limit: only in the north on the meadows beyond 2400/2500 m, or on glaciers (not too crevassed). Snow quality: dusting from 1800/2000 m; the snowfall from Saturday night to Sunday provides 2/5 cm of wind-affected fresh snow without a weak layer at 2200 m. In the north, the thickness of recent snow becomes significant from 2600 m (7/15 cm), then quickly 20/30 cm from 3000 m. Recent snow is often powdery over a hard surface, becoming worked by the wind. Weak layer from 2300/2800 m. In the south, you must go above 2800 m to find wind-affected recent snow and often wind crust.