Snow and avalanche bulletin n° 66
issued on 4/27/2015 at 30:00 p.m.
 

valid 72 hours out of controlled and open ski runs
Next update on 04/29/2015

GENERAL CONDITION   Snow/rain level at 2200 m !
  Snow height [ cm ] Ta
[°C]
Last
snowdrift event
Last snowfall Continuous snowcover above
[m a.s.l.]
Ground level New
h 07:00 h 07:00 h 07:00 h 07:00
2000 m 2500 m 2500 m 2000 m Shady Sunny
A - Central Valle d’Aosta 0-70 60-120 5-10 +1 4/6/2015
strong N high altitude
4/27/2015
in progress > 2200 m
2100-2300 2400-2600
B - Gressoney, Ayas, Champorcher Valleys 0-80 70-170 5-10 +2 4/6/2015
moderate N high altitude
4/27/2015
in progress > 2200 m
1900-2100 2200-2600
C - Rhêmes, Valsavarenche, Cogne Valleys 0-40 60-80 5-20 +1 4/6/2015
strong N-NE high altitude
4/27/2015
in progress > 2200 m
2000-2300 2200-2600
D - Alpine ridge 0-70 30-180 5-20 +1 4/6/2015
strong N-NE high altitude
4/27/2015
in progress > 2200 m
1800-2000 2100-2600
The bad weather during the weekend and the rainfall today, concentrated mainly in the areas bordering with Piedmont, in the high Valtournenche and in the high Valpelline, have furtherly moistened the snowpack: the snow/rain level is around 2200 m, the new snow is moist/wet until at least 3000 m.
At all aspects, above 2400-2600 m (below this altitude there's not much snow on the ground), small and medium-sized, full-depth, natural avalanches of wet snow have been reported and may still occur because of the loss of cohesion of the snowpack, which is often moistened down to the ground. At N aspects, where the amounts of snow still present are greater, single large avalanches could still occur.
The danger level is 3-considerable in the areas bordering with Piedmont, in the high Valtournenche and in the high Valpelline where we should have some more precipitation today, 2-moderate elsewhere.
Weather forecast Show map
FORECAST   Some windslabs above 3000 m, very wet snow below !
Tuesday 4/28/2015
The moist new snow has a good bond with the snowpack surface below since this latter appeared not frozen before the snowfall.
However, above 2800-3000 m, the N-NW moderate/strong winds forecast for Tuesday will dry and drift the fresh loose snow building up some wind deposits, generally of small/medium size; windloads could be released by low overloading.
Below 2800-3000 m, at all aspects, will remain the possibility of small/medium, full-depth, wet snow natural releases.
The avalanche danger level for Tuesday and Wednesday will be 3-considerable, for both critical issues (windloads and wet snow) in the bordering with Piedmont, in high Valtournenche and in high Valpelline, 2-moderate elsewhere (mainly linked to the wet snow problem). Later, there will be a gradual improvement and the reduction of the danger level.
Wednesday 4/29/2015
Thursday 4/30/2015
KEY Critical slopes altitude and aspects Rising avalanche danger during the day
Hazard scale
5
VERY HIGH
4
HIGH
3
CONSIDERABLE
2
MODERATE
1
LOW
Answering service: snow and avalanche Bulletin +39 0165 776300 - Weather Bulletin +39 0165 272333
For an accurate interpretation of the Bulletin, a specific guide is available at www.aineva.it/guida.html