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Alpes du Nord

Chablais

Sat 15 Nov

Avalanche Problems

Low (1) Dry avalanches · all day
Dry snow level 1 Wind slab 1
SW
above 2300m
Field notes

Look for fresh snow deposits on Slope facing downwind/ wind sheltered aspect. Snow deposits can attain several times average snow depth.EAWS glossary, in Usually a steep, elongated, eroded trench; typically prone to snowdrift accumulation.EAWS glossary and Rounded or elongated concavity; typically tending to accumulate snowdrift.EAWS glossary, and behind ridgelines and abrupt changes in terrain — these are where the wind has loaded the snow into slabs that are easy to trigger. Recent avalanches, shooting cracks under your weight, and Distinctive noise (resembling a “whumpf” sound) occurring when a weak layer beneath a slab collapses. The air of the weak layer is forced outside the snowpack, with the resulting whumpf sound being heard. The sound usually indicates an unstable situation and can be accompanied by surface cracking. A whumpf is a clear avalanche alert.EAWS glossary sounds are clear confirmations of the problem. The safest move is to avoid wind-loaded terrain entirely. NB wind signs alone don't always mean an avalanche problem exists, and the age of drifted snow is hard to judge.

Source: SLF Avalanche Bulletin Interpretation Guide

Avalanche Activity

RARES INSTABILITÉS EN ALTITUDE

  • Départs ponctuels dans la neige fraîche au fil des chutes. Taille 1 (petite).

Au-dessus de 2300 m : rares plaques friables. Elles se forment dans la neige fraîche humide qui tombe dans l'après-midi du samedi, sous le vent de SO. Taille 1 (petite).

Observables : transport de neige par le vent, vaguelettes, fissures devant les skis, accumulations ...

Outlook

Constant avalanche danger

Snowpack & Weather

Snowpack

Situation avalancheuse typique

neige ventée

Déclenchements provoqués :

Au-dessus de 2300 m : rares plaques friables. Elles se forment dans la neige fraîche humide qui tombe dans l'après-midi du samedi, sous le vent de SO. Taille 1 (petite).

Observables : transport de neige par le vent, vaguelettes, fissures devant les skis, accumulations ...

Départs spontanés :

  • Départs ponctuels dans la neige fraîche au fil des chutes. Taille 1 (petite).
Outlook

Tendance du dimanche 16 novembre

Indice de risque faible

ouvelles petites chutes de neige en journée

dimanche créant de nouvelles instabilités.

Source

Météo-France

Issued

14 Nov 15:01 UTC

Valid until

15 Nov 23:59 UTC

Next update

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