Brenta meridionale · 18 December 2025

Day Risk Profile

Low

below 2400m

Moderate

above 2400m

Avalanche Problems

Above 2600 m

Moderate (2) Dry avalanches · all day

Persistent weak layers Slab 2

N, NE, NW

above 2600m

Small Few Poor

Field notes

Persistent Snowpack layer in which the crystals are poorly bonded and the layer has the potential to fail. Typical crystals in dry weak layers causing avalanches are : precipitation particles; surface hoar; faceted crystals; hollow crystals; graupel. Generally >1mm in size, loose grains with few bonds Wet weak layers can be formed by all snow crystal/grain types.EAWS glossary are very challenging to recognise. 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 and shooting cracks are typical when present, but you can have a serious weak layer with no warning signs at the surface. Knowledge of how the Snow deposited on the ground in a multiplicity of layers.EAWS glossary has evolved is essential. SLF's travel advice is direct: travel conservatively, avoid terrain where the consequences of being caught are large, and treat the history of weather and snow as more important than what you can see today. Read the full bulletin.

Source: SLF Avalanche Bulletin Interpretation Guide

Above 2400 m

Moderate (2) Dry avalanches · all day

Wind slab Slab 2

N, NE, E, W, NW

above 2400m

Small Some Poor

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

As a consequence of new snow and wind a moderate avalanche danger will be encountered in some localities.

As a consequence of snowfall above approximately 2000 m and the wind, snow drift accumulations formed during the last few days. The wind slabs are mostly shallow and prone to triggering. These are clearly recognisable. As a consequence of the sometimes strong westerly wind the prevalence of the Locations delineated by aspect or altitude where avalanches can trigger and people or objects are at risk.EAWS glossary will increase in the afternoon. This applies especially on shady slopes in Areas above approximately 3000 m (particularly glaciated areas).EAWS glossary. In isolated cases avalanches can be triggered in the weakly bonded old snow. Such avalanche prone locations are to be found in particular on extremely steep shady slopes above approximately 2600 m. Mostly avalanches are small.

Outlook

Constant avalanche danger

19 December 2025

The avalanche danger will persist.

Snowpack & Weather

Snowpack

Up to 15 cm of snow, and even more in some localities, has fallen since Tuesday above approximately 2000 m. The wind slabs of the last few days are poorly bonded with the Snow layers deposited from earlier precipitation, prior to fresh fallen snow. Old snow layers consist of metamorphosed snow crystals.EAWS glossary. All 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.EAWS glossary below approximately 2600 m: Shady slopes above approximately 2600 m: Precarious Snowpack layer in which the crystals are poorly bonded and the layer has the potential to fail. Typical crystals in dry weak layers causing avalanches are : precipitation particles; surface hoar; faceted crystals; hollow crystals; graupel. Generally >1mm in size, loose grains with few bonds Wet weak layers can be formed by all snow crystal/grain types.EAWS glossary exist in the bottom section of the Snow deposited on the ground in a multiplicity of layers.EAWS glossary. In all regions less snow than usual is lying. The snowpack remains subject to considerable local variations.

Source

ALBINA

Issued

17 Dec 16:00 UTC

Valid until

18 Dec 16:00 UTC

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