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.

N74030411
SNOW AND AVALANCHE BULLETIN FOR HAUTE SAVOIE
(VALID OFF OF OPEN AND MARKED RUNS)
PREPARED ON THURSDAY APRIL 3
FOR FRIDAY APRIL 4

ESTIMATE OF RISK UNTIL FRIDAY EVENING:

All massive Haute-Savoie: limited risk (level 2).

WEATHER OVERVIEW UNTIL FRIDAY EVENING:
Dry weather, a few clouds to 1500 m in the early morning in the valleys, sunny in the mountains. In the afternoon, alternating sun and Cumulus spring. Temperature at 2000 m: -7 and -2 DG.
Isothermal 0 1200 1800 m.
Wind at 2000 m: North-east 30 km / h in the Mont Blanc, 40 km / h on Aravis / Chablais.
Wind at 4000 m: North-east 60 km / h.

SNOW CONDITIONS:
Well, close to the averages for early April. It is therefore fitting the ski slopes 1300 m in cold North, 1600 m in the South.
Quality of snow Thursday: snow surface increases and keeps a little skis below 2200 m in northern slopes and up to 2500 m in the South. At higher elevations, snow and cold is more lightly. In the high mountains and on the crests of Chablais, prone zones may be a bit compacted by Bise.

STABILITY OF SNOW COVER: rare slabs and castings

From Monday to Wednesday, it fell between 20 and 40 cm of snow in two stages. The snow surface is in the process of settling. It is based on sub-layers rather stable (with a few exceptions, particularly in areas of high altitude cold).

The risk of an avalanche: a few slabs were formed in the recent snow and with the north wind aloft. They are likely to break with the passage of a group of hikers, more rarely of one person. These slabs are mainly located near the peak and slope failures in North-West and East, especially above 2300 meters.

Likelihood of spontaneous departure Avalanche: After several hours of sunshine, small surface purges occur. Watch for steep oriented South-East, South and West, particularly in the sheltered sides of the Bise and under the cliffs where warming is more effective. These avalanches are limited for the most part to small cast, but a volume slightly higher could stall to 2000 m west in the afternoon.

TREND FOR SATURDAY:
The decline continues, but it should be expected to cast a little more gentle with the sun in April.
Meteo-France updates this newsletter every day to 16h or sooner if conditions warrant nivométéorologiques.