Avalanche bulletin and weather forecast Haute Savoie

This avalanche translation of the Meteo France avalanche bulletin is produced mainly through an automated translation tool.  Please use it in conjunction with the French bulletin found at the above link.

N74200111
SNOW AND AVALANCHE BULLETIN FOR HAUTE SAVOIE
(VALID OFF OF TRACKED AND OPEN RUNS)
PREPARED ON SUNDAY JANUARY 20
FOR MONDAY 21 JANUARY
ESTIMATE OF RISK UNTIL MONDAY EVENING:
All mass of Haute Savoie:
More low as 2100/2300 m: Low risk (level 1) that evolves marked risk (level 3) with the sun, especially in the southern slopes.
Above that 2100/2300 m: Risk limited (level 2), the largest in southern slopes

WEATHER OVERVIEW UNTIL MONDAY EVENING:
Good weather, very soft. The subjected snow will still be correct overnight.
Isothermal 0 3000 2800 m.
Wind at 2000 m: southwest 30 to 40 km / h. Wind at 4000 m: West 60 km / h.

SNOW CONDITIONS:
The snow is good except at low altitudes below 1000/1200 m, which is quite low. Towards 1500 m, there are approximately 70/80 cm of snow in the North, 30 cm in the South. You can generally put on skis as soon as 1000 m in the shade. In southern slopes, it is necessary to mount 1300/1400 m to find suitable conditions.

Quality of snow Monday: On average mountain snow will crust and regelée often hard in the morning below 2000/2200 m, 3000 m up in a south slope, the ski will not be very pleasant. High altitude, it is usually a fairly powdery snow if it is not compacted by the wind. During the day, the snow humidifies itself on southern slopes adjacent to altitudes of 3000 m. In east and west, the snow humidifies itself slightly on the surface until 1800/2000 m. On average mountains below 2000 m, in the shadow due north, the crust subjected persist throughout the day.

STABILITY OF SNOW COVER: Avalanche risk of wet snow in the sun.

Different snow that fell since Monday have been successfully stabilized as a whole. The risk of an avalanche slab to move from one person is now localized to a few slopes limited primarily at 2200 m. Rare small wind slabs could form to the high altitude peak with the wind rising during the day.

With the sun and the soft, it should be noted some natural avalanche activity Monday in the sunny slopes. Indeed, once the crust subjected disappeared after several hours of sunshine, it is to be expected at the end of the morning and afternoon with some spontaneous avalanches of wet snow, mostly in the hills south-east to south - west and up to 2600 m south. The western slopes could also be involved in the afternoon below 1800 meters. These triggered avalanches are generally close to rocks or rocky cliffs sunny. A skier could facilitate the departure of this type of avalanche cutting a steep slope overheated by the sun. In many steep slopes on the ground in grassy or rocky slabs, the Avalanche could be the biggest in carrying snow to the ground slopes in more or less south.

TREND LATER RISK: Tuesday, which could trigger a slab avalanche with the passage of skier will be on the rise while the risk of natural avalanches drops.
Meteo-France updates this newsletter everyday at 16h or sooner if conditions warrant.