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.

N74240311
SNOW AND AVALANCHE BULLETIN FOR HAUTE SAVOIE
(VALID OFF OF OPEN AND MARKED RUNS)
PREPARED ON MONDAY 24 MARCH
FOR TUESDAY 25 MARCH
ESTIMATE OF RISK UNTIL TUESDAY EVENING:
All massive Haute-Savoie:
Below 1800 m: marked risk (level 3)
Above 1800 m: marked risk (level 3) operating locally in high risk (level 4).

WEATHER OVERVIEW UNTIL TUESDAY EVENING:
Snow windy during the night. Tuesday, still snowfall gradually weakening in the morning, sunny in the afternoon. Quantities of fresh snow expected since Monday afternoon: 20/25 cm at 1000 m, locally 30/40 cm above 2000 m.
Isothermal 0 DG: 800 m.
Wind at 2000 m: West 50 and 30 km/h.
Wind at 4000 m: Northwest 110 km/h.

SNOW CONDITIONS:
With winter moved over the past few days, snow has improved markedly. At 1000 m on Monday, measuring between 20 and 40 cm, and 1500 m in the north a little more than 1 m of snow.
Quality of snow for Tuesday: there will be a good layer of snow, light and powdery, and worked blown by the wind in exposed areas. At low altitude, the layer of snow based on a sub-layer crust.  With warm in the afternoon, the snow will increase to below 1800 m and humidify itself in a little sun at low altitude.

STABILITY OF SNOW COVER:
Fragile slabs and few natural avalanches quite large.

The heavy snow last Friday were packed and stabilized as a whole. Instability comes essentially from the fresh snow surface and blown the night based on a cold and snow lightly.

The risk of an avalanche of hard or brittle slabs will be marked Tuesday, particularly in areas where the accumulation of snow blown by the night will be filed, thus shifted away from the peaks or the big breaks slopes but also possible but a more localized in the morning. Tuesday afternoon, with light, the risk of brittle slab could rise another notch and the same well below peaks. The mere passage of a skier in this case could trigger the slab. The slabs themselves may not be thick but the resulting avalanche that could take in a large volume slope towards the thickness of snow and cold anywhere.

As to the risk of avalanches, it will gradually increase with the snowfall by Tuesday noon in a few steep slopes before faltering in the afternoon. Again, these avalanches dusters could be locally heavy enough for the thickness of snow anywhere especially in the case of departure-2000 m.

TREND LATER RISK: Risk down slightly for Wednesday
Meteo-France updates this newsletter everyday at 16h or sooner if conditions warrant nivométéorologiques.