SAT 11th MAR 2023
High reliability
Issue date: 11 MAR 2023 at 07:42
Weather forecasts and field observations are reliable
CONSEQUENCES FOR PERSONS OUTSIDE SECURED ZONES
Highly unfavourable conditions. Avoid open terrai.
SNOWPACK STABILITY
The snowpack is poorly bonded and largely unstable in general.
AVALANCHE TRIGGERING PROBABILITY
Numerous very large and often extremely large natural avalanches can be expected, even in moderately steep terrain*.
CONSEQUENCES FOR PERSONS OUTSIDE SECURED ZONES
Unfavourable conditions.Extensive experience in the assessment of avalanche danger is required. Remain in moderately steep terrain / heed avalanche run out zones
SNOWPACK STABILITY
The snowpack is poorly bonded on most steep slopes*.
AVALANCHE TRIGGERING PROBABILITY
Triggering is likely, even from low additional loads**, on many steep slopes*. In some cases, numerous large and often very large natural avalanches can be expected.
CONSEQUENCES FOR PERSONS OUTSIDE SECURED ZONES
Partially unfavourable conditions.Experience in the assessment of avalanche danger is required. Steep slopes of indicated aspects and altitude zones should be avoided if possible
SNOWPACK STABILITY
The snowpack is moderately to poorly bonded on many steep slopes*.
AVALANCHE TRIGGERING PROBABILITY
Triggering is possible, even from low additional loads**, particularly on the indicated steep slopes*. In certain situations some large, and in isolated cases very large natural avalanches are possible.
CONSEQUENCES FOR PERSONS OUTSIDE SECURED ZONES
Mostly favourable conditions. Careful route selection, especially on steep slopes of indicated aspects and altitude zones.
SNOWPACK STABILITY
The snowpack is only moderately well bonded on some steep slopes*; otherwise well bonded in general.
AVALANCHE TRIGGERING PROBABILITY
Triggering is possible, primarily from high additional loads**, particularly on the indicated steep slopes*. Very large natural avalanches are unlikely
CONSEQUENCES FOR PERSONS OUTSIDE SECURED ZONES
Generally safe conditions.
SNOWPACK STABILITY
The snowpack is well bonded and stable in general.
AVALANCHE TRIGGERING PROBABILITY
Triggering is generally possible only from high additional loads** in isolated areas of very steep, extreme terrain*. Only small and medium natural avalanches are possible.
* The avalanche-prone locations are described in greater detail in the avalanche bulletin (altitude, slope aspect, type of terrain).
• moderately steep terrain: slopes shallower than about 30 degrees
• steep slopes: slopes steeper than about 30 degrees
• very steep, extreme terrain: particularly adverse terrain related to slope angle (more than about 40 degrees), terrain profile, proximity to ridge, smoothness of underlying ground surface
** Additional loads:
• low: individual skier / snowboarder, riding softly, not falling; snowshoer; group with good spacing (minimum 10m) keeping distances
• high: two or more skiers / snowboarders etc. without good spacing (or without intervals); snowmachine; explosives
natural: without human influence
MAIN PROBLEM 1: WIND SLAB
Slab avalanches from wind
SLAB AVALANCHES FROM WIND
MAIN PROBLEM 2: PERSISTENT WEAK LAYER
SLAB AVALANCHES
DANGER DESCRIPTION
Above and at the treeline, on North-Eastern areas behind slopes change, unstable wind slabs will become even larger with strong winds; on the same slopes in isolated cases small unstable hard slabs are recorded on top of persistent weak layers and slab avalanches can be triggered. Locally, avalanches can involve the weak layers even deeper and increasing in size. On very sheltered slopes is still possible to hit stones either skiing or if caught in an avalanche.
TRAVEL AND TERRAIN ADVICE
The wind slabs are evident and should be avoided, danger points are linked to the presence of superficial hard slabs mostly on Eastern and Southern slopes. Approach steep slopes, passages from thin to thick snowpack, and slopes change with caution. Whumpfing sounds are clear danger signs. Pay attention to the strong winds at high elevations.
SNOW COVER CHARACTERISTICS
Above the treeline, in most wind sheltered areas there are 5/15 cm of new snow, while in other areas the snowpack is strongly wind-affected, with old slabs and wind-drifted accumulation behind slope’s change that stand on persistent weak layers. Ridges are generally completely eroded. On few very sheltered slopes facing North a low cohesion snowpack is still present. On southern slopes the snowpack is composed by a single melt-freeze crust, while on the other exposures its present only near the surface. Below the treeline the thickness of the snowpack is poor and on North is mainly composed by loose snow.
REGIONAL AVALANCHE DANGER LEVEL: 2
WEATHER
Strong northwesterly winds during the day, variable cloudiness with snow carried by winds.
| Weather data data at 07:00 11-03-2023 | Valley | Altitude |
| Snow height | 26 cm | 63 cm |
| New snow | 2 cm | 8 cm |
| Air temperature min/max | -3/6,1 °C | -10,6/-1,9 °C |
| Wind: speed ava/max | | 15/105 Km/h |
| Wind direction | | South-West |
For snow stability feedbacks, avalanche reports or additional info on the avalanche bulletin, write to
freeride@livigno.eu NOTE:
This bulletin applies to all sports/recreational activities taking place in the district of the municipality of Livigno. Regional information on avalanche danger can be found at: https://www.slf.ch/en/avalanche-bulletin-and-snow-situation.html#avalanchedanger
The local avalanche bulletin and other information provided by APT Livigno, the Town of Livigno and ALPsolut Ltd, are limited to personal use and are for recreational purposes only.
This information is provided "as is" and the authors cannot be held responsible for possible damages resulting from discomfort, injury, death, claims by third parties and other coincidental causes or consequential damages arising from the use of such information.
The recipient of the information contained therein acknowledges that natural phenomena such as avalanches cannot be accurately predicted and any usage of the data must fully take this into consideration.The accuracy and reliability of the data is therefore not guaranteed and the providers of this service disclaim all liability of any kind, take no responsibility for the quality of services, the impossibility of its usage, its marketability, nor any possible misuse thereof.The predicted level of danger of the avalanche is in accordance with the European Avalanche Danger scale ( https://www.avalanches.org/standards/avalanche-danger-scale/). The icons used to describe the typical avalanche problems are consistent with those specified by the European Avalanche Warning Services (https://www.avalanches.org/standards/avalanche-problems/).
-4/2°C
29/31
WEBCAM
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