Haute Savoie Avalanche Bulletin

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This bulletin is produced from an automatic translation using a specialized dictionary for words and phrases relating to snow and avalanches. It should only be used as a complement to the actual bulletin in French. There are a number of reasons why the translation is imperfect including colloquialisms use of French, spelling and grammar errors and complicated sentences.

• Bulletin Neige et Avalanches Haute-Savoie - (Weekly Summary)

N74080211
AVALANCHE BULLETIN of Haute Savoie
(OUT OF VALID and open ski runs)
FOR Tuesday, February 9
PREPARED ON Monday, February 8
RISK ASSESSMENT UNTIL TUESDAY NIGHT: All ranges of Haute-Savoie:
At over 2,000 m, (Big) marked risk (level 3).
At least 2,000 m, limited risk (level 2) evolving in marked risk (level 3) Tuesday over the day.

WEATHER OUTLOOK UNTIL TUESDAY EVENING:

The next night, the sky became cloudy before the arrival of the first snowflakes in the second part of night. On Tuesday, the weather will be blocked in the mountains and it snowed all day (10/15 cm of fresh snow on the ranges Chablais and Mont Blanc, 15/25 cm on the ranges Bornes, Aravis, blown at high altitude). Temperature around 1500 m -3 to -1 deg.
Isotherm 0 DG: temporarily 1100 m and 800 m. Isotherm -10 DG: 3000 m and 2800 m.
Wind at 2000m: Southwest 20 to 30 km / h. Wind at 4000m: Southwest, 60 and 40 km / h.

SNOW_CONDITIONS:

They are normal for early February. In addition, soils are white at low altitudes and can skis at the bottom of the valleys, from around 700 m in North Slope.
A 1000 m, is measured on average 40/60 cm. About 1500 m: about 1 m.
Quality of snow for Tuesday: a good layer of snow surface, especially on Bornes, Aravis, a little blown out on Tuesday on the ridges and especially high_elevations. This fresh snow will be wet under 1000/1200 m. Moreover, this fresh snow blown high altitude, based on a recent snow cooler or cardboard recently blown by a recent episode of wind into ridges and other areas susceptible to wind northeast. In the southern slopes very steep, the snow will settle on a more or less snow crusted by the sun on Monday to 2000/2300 m according to the steepness of slopes.

STABILITY OF THE SNOWPACK:

PERSISTENCE OF A DANGER TO MAKE slab, HARD BRITTLE OR BY ALTITUDE.
On Tuesday, the upper layers of the snowpack, composed of snow and recent more or less blown over a thickness of 30 to 60 cm depending on the altitude, are often unstable in many fairly steep slopes, especially slopes more or less shady poorly attended.
Indeed, the deeper layers of the snowpack on slopes east, north and northwest, consisting of snow without cohesion to the appearance of \u0026quot;sugar\u0026quot;, largely explain the marked risk of avalanches slab brittle / hard scattered / hidden in deep snow.
In these shaded slopes or unenlightened in this time of winter, a person on skis or snowshoes may break locally a hard plate or brittle, sometimes big enough, let alone in the vicinity of the collar / crests / peaks, but also sometimes mid-slope at relatively low altitudes close to 1500/1700 m. On classic hiking routes or off-piste near the stations, tracks very regularly since the beginning of winter, the risk of triggering slab will be much less marked but beware of cons slopes usually just skied.
In the southern slopes of less than 2000/2300 m, the avalanche risk will be less marked because of the presence of crust-freezing more or less healthy, buried under fresh snow Tuesday.
The risk of natural avalanches, Tuesday will be limited to a small number of broken slab steep surface during snowfall and few surface streams.
EVOLUTION OF THE AVALANCHE RISK: Wednesday, risks remain well marked, especially as the wind northeast cause transport of snow / recent, especially near the passes and
ridges and other areas normally exposed to cold wind.

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