Boletín de aludes

Northwest Inland

Jan 2 – 3, 2015Avalanche Canada
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Archivado · caducó 12 years ago

Peligro de aludes

Sun
Mon
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil

Lo esencial

Conditions may vary significantly from South to North. Be sure to supplement this forecast with your own local observations.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–4
    Fresh touchy wind slabs could form on open N and E facing slopes. New snow may also hide older hard and stubborn wind slabs from the previous outflow winds - these can be found on S and W facing slopes.
  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–6
    A crust buried in mid November remains sensitive to human triggering, especially in thin spots near rock outcroppings. Surface avalanches in motion may step down to this interface.

Confidence

Fair - Forecast snowfall amounts are uncertain on Sunday

Weather Forecast

Synopsis: Saturday is mainly cloudy with a chance of flurries. Temperatures drop significantly as the Arctic ridge pushes west toward the coast. Periods of snow are expected on Sunday as a frontal system clashes with the Arctic front. Currently weather models only suggest around 5-10 cm, but there is potential for much more in some areas. Winds will also increase to strong from the S-SE. Snow tapers off to flurries on Monday and winds ease to light. Check out this Special Weather Statement for the Bulkley Valley and Smithers.   

Avalanche Summary

There was one report of a small size 1 rider-triggered avalanche on Thursday. It involved only the recent storm snow and was triggered on a steep gully wall. On Dec. 29 a rider triggered a size 1.5 avalanche on a north aspect in the alpine at 1700m. The small steep wind loaded slope was triggered when the machine was climbing, the rider reportedly rode out of the avalanche behind the debris. See the Mountain Information Network for a photo and more details.

Snowpack Summary

The freezing level spiked to 2000 m in the southernmost part of the region on New Years Day. At higher elevations and northern sections there was around 5-15 cm of new snow. Ridge top winds were reported to be very strong from the W-NW, likely creating hard and soft wind slabs in exposed lee terrain. In northern sections the new snow now covers a potential weak layer of surface hoar. Down 30-50 cm you may find another surface hoar layer, although it appears to be spotty in distribution. Near the bottom of the snowpack is a crust facet combo that was buried in mid-November. This layer is currently dormant and produces variable results in snowpack tests. I suspect it will remain sensitive to new inputs in the form of new snow and wind for the foreseeable future.

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