Bulletin d’avalanche

South Rockies

Nov 22 – 23, 2012Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Sat
Sun
Alpin
Sans niveau
Limite forestière
Sans niveau
Sous la limite
Sans niveau
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Points saillants

This bulletin is based on limited data. Local variations in conditions are likely to exist. Check out the Forecasters Blog for further details on interpreting early season bulletins.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–4
    Wind slab instabilities likely exist and may be touchy to rider triggers. Wind slabs can be found on lee slopes and behind terrain features. Storm slab instabilities may still exist on all aspects, and require a couple days to settle out. 

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–5
    An early November rain crust is buried down approximately 40-60 cm at treeline and in the alpine. Information is almost non-existent, but adjacent regions have been seeing avalanche activity occur on this layer.

Confidence

Poor - Due to limited field observations for the entire period

Weather Forecast

A Pacific frontal system will be dominating the coastal regions tonight. This system will move into the Interior regions on Friday bringing light –moderate snow accumulations.  Through the weekend a NW flow will set up, bringing cooler, dryer conditions and partially sunny skies. Freezing levels remain in valley bottom through the period.Friday: Alpine -5, snow 5-10 cm, winds SW 30 – SE 40 km/hr.Saturday: Alpine -10, snow 2- 5 cm, winds W 20 km/hr switching NW.Sunday: Alpine -15, snow 5 cm, winds NW 10km/hr.

Avalanche Summary

No current avalanche observations have been submitted. If you and your friends have been out exploring and riding in the backcountry, and have some observations to share please send us an email to [email protected].

Snowpack Summary

Snowpack observations and information are extremely limited, and conditions across the region vary. In the alpine I suspect anywhere from 50-100 cm of snow. Storms slabs and wind slabs likely exist in alpine and treeline elevations. An early season (Nov 8) rain crust has been reported to exist around 2000 m and above on NW-NE aspects. I have no further information in regards to this crust, how deep its buried or reactive it may be. I do know that it has been a reactive sliding layer in other regions to the North, which makes me suspect this problem may extend into the South Rockies.Snow depths at treeline are roughly sitting around 30-50 cm in depth, and below treeline snow levels may still be below threshold.

Régions couvertes