WED 19th DEC 2018
High reliability
Issue date: 19 DEC 2018 at 07:46

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 general.
AVALANCHE TRIGGERING PROBABILITY
Numerous very large and often extremely large 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 large and often very large 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 certain situations some large, and in isolated cases very large 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 general.
AVALANCHE TRIGGERING PROBABILITY
Triggering is possible, primarily from high additional loads**, particularly on the indicated steep slopes*. Very large 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 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: OLD SNOW (PERSISTENT WEAK LAYERS)
Livigno OLD SNOW (PERSISTENT WEAK LAYERS)

Slab avalanches

ALTITUDE
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EXPOSURE
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LIKELIHOOD
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AV. SIZE
TREND
Livigno TREND
SLAB AVALANCHES

MAIN PROBLEM 2: WIND LOADING
Livigno WIND LOADING

Slab avalanches from wind

ALTITUDE
Livigno ALTITUDE
EXPOSURE
Livigno white Livigno EXPOSURE Livigno EXPOSURE Livigno EXPOSURE Livigno EXPOSURE
LIKELIHOOD
Livigno LIKELIHOOD
AV. SIZE
TREND
Livigno TREND
SLAB AVALANCHES FROM WIND
DANGER DESCRIPTION
Mainly in the alpine, the snow drift accumulations stand on persistent weak layers and are not fully consolidated. The recent small sized snow drift accumulations are still partly unstable.
TRAVEL AND TERRAIN ADVICE
The avalanches triggered on the persistent weak layers are possible, keeping distances and ski one by one steep slopes is recommended. The new and drifted snow do not ease the dangerous spot identification. A careful route selection is recommended.
SNOW COVER CHARACTERISTICS
The snow cover thickness increases with elevation. In the wind sheltered areas the snow surface is loose; elsewhere, the snow drift effects increase with the elevation. On Northern and Eastern slopes, wind slabs stand on weak layers. The snow cover base is well settled at all elevations.
REGIONAL AVALANCHE DANGER LEVEL: 2
WEATHER
Cloudy with increasing cloudiness during the day and snowfall possible since the afternoon.
Weather data data at 07:00 am 19-12-2018 Valley Altitude
Snow height 42 cm 139 cm
New snow 0 cm 0 cm
Air temperature min/max -17,6/-2,5 °C -8,7/-3 °C
Wind: speed ava/max   14/20 Km/h
Wind direction   W-NW


For snow stability feedbacks, avalanche reports or additional info on the avalanche bulletin, write to [email protected]

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)