Bulletin d’avalanche

Northwest Inland

Jan 14 – 15, 2015Avalanche Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Lack of recent avalanche activity indicates we  haven't seen the loads necessary to trigger buried weak layers. Conservative route selection is still essential to staying safe.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Dribs and drabs of new snow will load lee slopes in the next little while. Be on the lookout for wind-loaded pockets that might fail with rider loads.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–6
    This weakness is widely variable in depth and seems to be mostly around tree-lane and below . It could be triggered by a small wind-slab avalanche or the weight of a snow machine.

Confidence

Fair - Due to the number and quality of field observations

Weather Forecast

A fast moving cold front will pass through the area Thursday evening bringing strong south winds and 5 to 10 cm of new snow at the upper elevations. Freezing levels should remain around 500m, but may dip to valley bottom. Friday will have a break in the weather before the next pacific system arrives on Saturday.

Avalanche Summary

No reports of avalanche activity in the region yesterday, but further west there have been reports of large natural avalanches on s facing slopes at upper elevations. We just having seen the quantity of snow in the NW Inland,..yet.

Snowpack Summary

Strong South winds will build wind-slabs on lee aspects in exposed terrain, generally depositing snow on N and NE aspects. Below the recent storm snow is a rain crust at lower elevations and a temperature crust that formed on the surface above treeline from the last temperature inversion. In the mid-pack a surface hoar layer has been reported, as well as a mid-December crust, but we haven't seen any activity on it recently. Most likely because it hasn't yet received a significant load on it. Near the base of the snowpack is a November crust-facet combination that could remain problematic for some time.

Régions couvertes