Boletín de aludes

Northwest Inland

Jan 19 – 20, 2015Avalanche Canada
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Archivado · caducó 12 years ago

Peligro de aludes

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

Snow, wind, and warming are on the menu this week. Expect slabs to build and avalanche danger to rise. 

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–3
    Forecast snowfall and strong SW winds will build fresh wind slabs in exposed lee terrain and cross-loaded gully features. The size and likelihood of this problem will increase throughout the week.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–6
    Persistent slabs are most likely to be triggered from shallow snowpack areas, or with a very heavy load (i.e. cornice fall).

Confidence

Fair - Forecast snowfall amounts are uncertain

Weather Forecast

Synopsis: The storm track looks like it will be aimed squarely at the Northwest for the next few days bringing a series of frontal systems. Expect 5-15 cm of snow on Tuesday, another 15-30 cm (or mm) Tuesday night through Wednesday, and it keeps coming down on Thursday. We should see a warming trend with freezing levels around 500-1000 m on Tuesday, and 1500-1700 m on Wednesday/Thursday. Winds should be consistently moderate or strong from the SW.

Avalanche Summary

A couple size natural size 2 wind slabs were reported from steep wind loaded terrain (northeast facing) on Sunday.

Snowpack Summary

Strong southerly winds are building wind slabs, generally depositing snow on N and NE aspects (other aspects may be getting cross-loaded or variable local wind effects too, so keep your eyes open). A surface hoar layer was reported to have been buried at the start of January in the northern part of the region. In the mid-pack, a crust weakness buried in mid-December seems to have fallen off most operators' radar for now. Near the base of the snowpack is a November crust-facet combination that could remain problematic, especially in shallower snowpack areas.

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