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Avalanche bulletin

DON 15 APR 2021
High reliability
: 15 APR 2021 ore 07:54

Weather forecasts and field observations are reliable

ALPINE
Livigno valore bollettino valanghe
TREELINE
Livigno valore bollettino valanghe
BELOW TREELINE
Livigno valore bollettino valanghe
Livigno icona pericolo forte
5
VERY HIGH
CONSEQUENCES FOR PERSONS OUTSIDE SECURED ZONES
Highly unfavourable conditions. Avoid open terrai.
SNOWPACK STABILITY
The snowpack is poorly bonded and largely unstable in genera.
AVALANCHE TRIGGERING PROBABILITY
Numerous large-sized and often very large-sized natural avalanches can be expected, even in moderately steep terrain.
Livigno icona pericolo forte
4
HIGH
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 medium-sized and often large-sized natural avalanches can be expected.
Livigno icona pericolo marcato
3
CONSIDERABLE
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 some cases medium-sized, in isolated cases large-sized natural avalanches are possible.
Livigno icona pericolo moderato
2
MODERATE
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 genera.
AVALANCHE TRIGGERING PROBABILITY
Triggering is possible primarily from high additional loads, particularly on the indicated steep slopes. Large-sized natural avalanches are unlikely.
Livigno icona pericolo debole
1
LOW
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 sluffs and small-sized natural avalanches are possible.

High additional load: group of skiers without spacing, snowmobile/groomer, avalanche blasting
Low additional load: single skier, snowboarder, snowshoe hiker
steep slopes: slopes with an angle of more than about 30 degrees
steep extreme terrain: those which are particularly unfavourable as regards slope angle (usually steeper than about 40°)

MAIN PROBLEM 1: WIND-DRIFTED SNOW
Livigno WIND-DRIFTED SNOW

Slab avalanches from wind

ALTITUDE
Livigno ALTITUDE
EXPOSURE
image white Livigno EXPOSURE Livigno EXPOSURE Livigno EXPOSURE Livigno EXPOSURE Livigno EXPOSURE Livigno EXPOSURE Livigno EXPOSURE Livigno EXPOSURE
LIKELIHOOD
Livigno LIKELIHOOD
DIMENSIONE
TREND
Livigno TREND
SLAB AVALANCHES FROM WIND

Above the treeline, generally medium sized, wind slabs formed, which are prone to trigger by the loading of a single person. With the light snowfall and winds, during the day, new, generally small sized, snow drift accumulations will form. In the alpine, on steep Northern aspects, in very isolated cases, persistent weak layers are recorded, the avalanches could still be triggered along these layers and increase their sizes.
The wind slabs should be avoided, the dangerous spots increase with the elevation. A strong experience in evaluating the local conditions is necessary and a carefull route selection is recommended. ATTENTION: the ski areas are closed, the regular grooming of the ski slopes, avalanche safety management and the piste rescue service are suspended. These areas are to be considered as not managed tracks and exposed to avalanche danger as well.
Above the treeline, the snow surface is wind affected; along windward slopes the snow surface is hard, along leeward slopes, snow-drift accumulations and loose snow alternate each other’s. Below the treeline, the new snow (5-15 cm) is recorded only along Northern aspects, elsewhere melt-freeze crust formed. Along Southern slopes, there is little or no snow. In the alpine, on Northern slopes, in isolated cases below the superficial slabs, persistent weak layers are recorded.
: 3
WETTER
Variably cloudy with snow shower possible (forecast 1-10 cm). Light-moderate North-Eastern winds.
07:00 15-04-2021
59 cm 246 cm
2 cm 7 cm
-17,2/3,2 °C -16,8/3,2 °C
  9/15 Km/h
  NW


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: http://www2.arpalombardia.it/siti/arpalombardia/meteo/previsionimeteo/bollettino-neve-valanghe/Pagine/BollettinoNeve.aspx or in neighboring Switzerland at:
http://www.slf.ch/lawinenbulletin/lawinengefahr/index_IT
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 (www.avalanche.org). and the icons used to describe the principle avalanche warnings are consistent with those specified by the Utah Avalanche Centre (www.utahavalanchecenter.org).
The terms used for the predictions are also consistent with the specifications of the Centre de Prediccion de Lauegi (www.lauegi.conselharan.org)

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