Avalanche.report

Thursday 02 05 2019

Published 01 05 2019, 17:00

Regions
IT-32-TN-02, IT-32-TN-13, IT-32-TN-01, IT-32-TN-04, IT-32-TN-05, IT-32-TN-16, IT-32-TN-19, IT-32-TN-08, IT-32-TN-07

AM
Danger level
Danger Level 2 - Moderate above 2200m
Danger Level 1 - Low above 2200m
Avalanche Problem
Wind-drifted snow above 2400m, N-NE-E-SE-W-NW

PM
Danger level
Danger Level 2 - Moderate above 2200m
Danger Level 2 - Moderate above 2200m
Avalanche Problem
Wind-drifted snow above 2400m, N-NE-E-SE-W-NW
Wet snow above 2600m, E-SE-S-SW-W-NW

The backcountry touring conditions remain wintry at high altitude.

The backcountry touring conditions in the morning, after a clear night, are mostly favourable. In the afternoon as a consequence of warming during the day there will be a gradual increase in the danger of moist and wet avalanches. As a consequence of fresh snow and wind, extensive wind slabs formed in the last few days. The avalanche prone locations are to be found in particular on west to north to southeast facing wind-loaded slopes above approximately 2000 m. Also slopes adjacent to ridgelines are especially precarious. Single skiers can release avalanches in some places, including large ones. On wind-loaded slopes and from starting zones at higher altitudes individual natural avalanches are possible, in particular medium-sized ones. Backcountry touring calls for experience in the assessment of avalanche danger and careful route selection.

Snowpack

The surface of the snowpack will freeze, but a strong crust will not form and will soften during the day. As a consequence of fresh snow and wind, deep wind slabs formed in the last few days in particular adjacent to ridgelines. The wind slabs are lying on soft layers in particular on steep shady slopes. They are mostly easy to recognise but can be released easily especially at their margins. In some cases fresh snow and wind slabs are lying on an old snowpack that is wet all the way through. This applies in particular on steep sunny slopes below approximately 3000 m and on shady slopes in particular below approximately 2400 m. Isolated avalanche prone weak layers exist in the bottom section of the snowpack especially in shady places that are protected from the wind.

Tendency

Temporary increase in avalanche danger as a consequence of warming during the day. As a consequence of the snowfall the avalanche prone locations will become more prevalent towards the evening.

Regions
IT-32-TN-12, IT-32-TN-15, IT-32-TN-03

AM
Danger level
Danger Level 1 - Low above 2000m
Danger Level 1 - Low above 2000m
Avalanche Problem
Favourable situation above 2000m

PM
Danger level
Danger Level 2 - Moderate above 2000m
Danger Level 1 - Low above 2000m
Avalanche Problem
Wet snow above 2000m, N-NE-E-W-NW

Wet and gliding avalanches especially on steep grassy slopes.

As a consequence of warming during the day, the likelihood of wet loose snow avalanches being released will increase in particular on very steep shady slopes at intermediate and high altitudes. Apart from the danger of being buried, restraint should be exercised as well in view of the danger of avalanches sweeping people along and giving rise to falls.

Snowpack

The fresh snow and wind slabs of the last few days are lying on the quite favourable surface of an old snowpack in all aspects above approximately 1800 m. Only a little snow is lying on south facing slopes.

Tendency

As a consequence of the snowfall the prevalence of avalanche prone locations will increase towards the evening.

Regions
IT-32-TN-14, IT-32-TN-17, IT-32-TN-06, IT-32-TN-18, IT-32-TN-09, IT-32-TN-20, IT-32-BZ-16, IT-32-TN-11, IT-32-TN-10, IT-32-TN-21

AM
Danger level
Danger Level 1 - Low
Avalanche Problem
Favourable situation above the treeline

PM
Danger level
Danger Level 2 - Moderate
Avalanche Problem
Wet snow above the treeline, N-NE-E-SE-S-SW-W-NW

As a consequence of warming during the day, the likelihood of wet loose snow avalanches being released will increase.

From origins in starting zones at higher altitudes individual natural avalanches are possible, but they will be mostly small. As a consequence of warming during the day, the likelihood of moist and wet avalanches being released will increase for a while in particular on steep grassy slopes at high altitude. Backcountry touring calls for defensive route selection.

Snowpack

The fresh snow and wind slabs of the last few days have bonded quite well with the old snowpack in all aspects. The snowpack will be generally moist. Hardly any snow is lying on south facing slopes.

Tendency

The conditions are spring-like. As a consequence of the snowfall the prevalence of avalanche prone locations will increase towards the evening.