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.

N74260111
SNOW AND AVALANCHE BULLETIN FOR HAUTE SAVOIE
(VALID OFF OF OPEN AND MARKED RUNS)
PREPARED ON SATURDAY 26 JANUARY
FOR SUNDAY JANUARY 27
ESTIMATE OF RISK UNTIL SUNDAY EVENING:
For all the massive Haute Savoie:
More low as 2000/2200 m: low risk (level 1) that evolves limited risk (level 2)
Above that 2000/2200 m: limit risk (level 2)

WEATHER OVERVIEW UNTIL SUNDAY EVENING:
Night allowing a clear regel correct the snow despite the softness in altitude. Mostly sunny and mild Sunday, a little hazy during the day.

Isothermal 0 DG: 2900 m with temperature inversion in the valleys in the morning.
Isothermal -10 DG: 4500 m.
Wind at 2000 m: Northeast, 30 and 40 km / h. Wind at 4000 m: 60 northwest then north 80 km / h.

SNOW CONDITIONS:
Snow is correct for the end of January on the average mountain. By contrast at low altitudes below 1200m, it is quite low. Towards 1500 m, there are 70 to 80 cm of snow in northern slopes, and 20/30 cm in southern slopes but sometimes there is nothing left if the slope is steep. It is fitting the skis to 1000 m in the shade, 1300/1600 m in the southern slopes depending on their inclination.

Quality of snow for Sunday will be crusty snow and the slopes in regelée more or less south to 3000/3300 m and in shaded slopes below 1300/1400 m. High altitude, there is a layer of snow more or less powdery surface based on a hard, but a powdery often blown cardboard or in areas prone to the bise.
During the day, snow will humidify itself in the sun until altitudes near 3000/3300 m south. In slopes with little or no sunshine, the snow will not change compared to the morning.

STABILITY OF SNOW COVER: Few wind slabs, some wet snow avalanches in the sun

The risk of a slab avalanche with the passage of a skier now is limited to the few places in the average mountains where snow was blown filed by forming a wind slab. These risk areas lie rather with the approach of the high peaks or a breach of slope over 2000 meters. In the high mountains, the risk of slabs could be slightly higher in some areas relating well below peaks.

As to the risk of spontaneous avalanches due to the softness and the sun, it will be limited to the sunniest slopes mid-mountain, therefore, generally south-east to south-west. Thus, after several hours of sunshine, once the subjected crust disappears, a few drips or small wet snow avalanches may occur naturally, if the slope is steep enough, rather close to the rocky areas and protected from the wind. In a very steep slope grassy ground, south-east to south-west, an avalanche largest locally could take the entire snow to the ground Sunday afternoon and early evening.

TREND LATER RISK: Monday and Tuesday, the risk of avalanche is expected to be stationary.
Meteo-France updates this newsletter everyday at 16h or sooner if conditions warrant.