Gruppo Tessa · 12 April 2026

Avalanche Problems

Above 2400 m

Moderate (2) Dry avalanches, earlier

Persistent weak layers Slab 2

N, NE, E, W, NW

above 2400m

Medium Few Poor

GM.10 GM.1

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

Moderate (2) Dry avalanches, later

Persistent weak layers Slab 2

N, NE, E, W, NW

above 2400m

Medium Few Poor

GM.10 GM.1

Field notes

Source: SLF Avalanche Bulletin Interpretation Guide

Below 2400 m

Moderate (2) Wet avalanches, earlier

Wet snow Slab 2

All aspects

below 2400m

Medium Few Poor

GM.10 GM.1

Field notes

Rolling snowballs, deep penetration when you step or ski, and small natural slides are clear signals that the Snow deposited on the ground in a multiplicity of layers.EAWS glossary is losing strength. After a clear, cold night the surface often freezes into a strong supporting Layer of hard-compacted snow resulting from a melt-freeze process or wind.EAWS glossary, and conditions are favourable in the early morning. After a warm, overcast night, the problem may be present from the start of the day. Plan early returns and watch the runout zones below you.

Source: SLF Avalanche Bulletin Interpretation Guide

Below 3000 m

Moderate (2) Wet avalanches, later

Wet snow Slab 2

All aspects

below 3000m

Medium Few Very poor

GM.10 GM.1

Field notes

Source: SLF Avalanche Bulletin Interpretation Guide

Avalanche Activity

The danger of moist and wet avalanches will increase quickly in the early morning.

The danger of moist and wet avalanches will already be elevated in the early morning. In the late morning as a consequence of warming during the day and solar radiation there will be an increase in the danger within the current danger level. Avalanches can penetrate deep layers and reach medium size. This applies in 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 2400 m, as well as on very steep sunny slopes below approximately 3000 m. Locations delineated by aspect or altitude where avalanches can trigger and people or objects are at risk.EAWS glossary for dry avalanches are to be found on very steep shady slopes above approximately 2400 m. The avalanche prone locations are difficult to recognise. Especially transitions from a shallow to a deep Snow deposited on the ground in a multiplicity of layers.EAWS glossary are unfavourable.

Outlook

Increasing avalanche danger

13 April 2026

As a consequence of mild temperatures and very cloudy skies the snowpack can not consolidate during the night. Up to high altitudes rain will fall on Monday. As a consequence of the rain, the likelihood of wet avalanches being released will increase in particular on steep shady slopes below approximately 2500 m.

Snowpack & Weather

Snowpack

Outgoing longwave radiation during the night will be reduced. The surface of the Snow deposited on the ground in a multiplicity of layers.EAWS glossary will freeze very little and will already soften in the late morning. The snowpack will become increasingly wet all the way through. This applies in 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 2400 m, as well as on steep sunny slopes at high altitude. Towards its base, the snowpack consists of Snow grains, solid, with multiple flat glassy faces and sharp edges. Developed from faceting metamorphism, usually poorly bonded to one another (fewer contact points), a critical factor in avalanches if a faceted layer is covered with bonded snow. Typical grain size: 0.5 to 3 mm See also: www.snowcrystals.itEAWS glossary. This applies in particular on west, north and east facing slopes at high altitude, as well as in all aspects in Areas above approximately 3000 m (particularly glaciated areas).EAWS glossary. The snowpack will be subject to considerable local variations. On steep sunny slopes at low and intermediate altitudes hardly any snow is lying.

Source

ALBINA

Issued

11 Apr 15:00 UTC

Valid until

12 Apr 15:00 UTC

Next update

—