Bulletin d’avalanche

South Coast

Jan 20 – 21, 2014Avalanche Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    I suspect that the snowpack has largely adjusted to the warm temperatures. Regardless, it would be prudent to adjust travel plans to avoid sun drenched slopes in the afternoon.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    4–7
    The affect of warm alpine temps will likely diminish in the coming days, but intense direct sun could destabilize the snowpack, especially on southerly aspects.

Confidence

Good

Weather Forecast

Synopsis: The proud upper ridge remains in place. Get used to it as its not going to make its exodus anytime soon.Tuesday: Freezing Level: 2700m; Precip: Nil; Wind: Light, SWWednesday: Freezing Level: 1300m; Precip: Trace; Wind: Mod, NWThursday: Freezing Level: 2500m; Precip: Nil; Wind: Light, NE

Avalanche Summary

A couple of loose natural avalanches released naturally from extreme SW facing terrain Sunday. No other significant activity to report from the weekend.

Snowpack Summary

Unseasonably warm daytime temperatures have left the snow surface in rough shape. A crust can be found on steep solar aspects to ridge top and on all aspects below 1600m. The crust may moisten when the air is still and the skies are clear.  Previous winds have scoured windward slopes and sculpted sastrugi in exposed areas. Initially, the bond below the most recent storm snow was weak. However, settlement due to the warm temperatures appears to have settled the upper snowpack and it has appeared to have gained strength.There are two lower layers of note near the base of the snowpack. A facet/crust combo from late November (down approximately 100-120 cm) is still giving "sudden" results in compression tests and exists at treeline and alpine elevations. Facets and depth hoar likely still exist at the base of the snowpack, especially in areas where the snowpack was particularly shallow early on in the season. The most likely places you would find this problem is in the alpine in shallow rocky areas, and it has been most widely reported from the Duffey Lake and Chilcotin areas.

Régions couvertes