Boletín de aludes

Chic-Choc Mountains

Jan 30 – 31, 2023Avalanche Canada
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Archivado · caducó 4 years ago

Peligro de aludes

Wed
Thu
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

Little change for the next few days, but cold temperatures will delay the stabilization of wind slabs.

Don't forget that when the rating is MODERATE, it is possible to trigger avalanches.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5

    The westerly wind will continue to blow the snow available for transport on the leeward slopes in the alpine and in the laterally loaded areas at the treeline, continuing the formation of wind slabs. These can be added, in previously loaded areas, to old wind slabs that are not yet fully stabilized. They directly cover the icy crust of January 18, which could be a favourable sliding surface for avalanches. The cold weather forecast for the next few days will slow the process of stabilizing the slabs and promote the development of facetted grains on the crust.

Confidence

High

Avalanche Summary

Smaller avalanches (size 0.5) from the wind slabs of the last snow were observed by the field team in the Hog's Back Grand Couloir.

Thanks for contributing to the collection of this valuable data by sharing with other users on the Mountain Information Network or by writing to us directly at [email protected].

Snowpack Summary

There is now 30-60 cm of low density, very skiable snow above the January 18 crust in wind protected areas, particularly below the treeline and on the tree line at the treeline. A great deal of spatial variability is found in the alpine and tree line, moving from soft slabs on the surface, resting on harder wind slabs, to the crust. Tests over the past few days continue to produce results on interfaces in new snow and above the crust. So be sure to take the time to analyze the conditions as you travel.Below the January 18 crust is 15-20 cm of snow, generally well packed, overlying facetted grains from the decomposition of the January 2 melt-freeze crust. This interface rests on a mixture of laminated crusts and facetted grains at the base of the snowpack.In general, the height of the snowpack varies from 50 to 80 cm in the valley to 100 to 140 cm in the mid-mountains.

Weather Summary

Forecast for the Chic-Chocs ridges and summits.

Synopsis: A high-pressure ridge brings decreased winds and cold temperatures to the Gaspé PeninsulaMonday evening and night: Light intermittent snow. Wind northwest, 20 to 30 km/h. Low -20. Tuesday: Cloudy, light intermittent snow. Wind southwest, 5 to 15 km/h. High -17.Wednesday: Sunny. Wind northwest, 30 to 50 kph. High -13.Thursday: Intermittent snow. Wind northwest, 30 to 40 km/h. High -12.

For more details, check the Alpine Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.

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