Bollettino valanghe

Northwest Inland

Jan 6 – 7, 2022Avalanche Canada
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Archiviato · scaduto 5 years ago

Pericolo valanghe

Sat
Sun
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole

In sintesi

The upper snowpack is heavily wind effected. Seek out sheltered terrain at treeline and below where you can avoid wind slabs and find good riding.

Days are short and temperatures are cold! Keep your objectives conservative and close to home.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2.5

    Recent strong northeasterly winds have likely formed wind slabs on lee features at treeline and above.

    These wind slabs are most likely to be found on south and westerly aspects, but older wind slabs may be found on all aspects.

    These wind slabs may remain reactive for longer than is typical because they are sitting on weak facets (sugary snow).

Weather Forecast

Wednesday Overnight: Partially cloudy, light to moderate southeast winds. Alpine temperatures around -32 C.

Thursday: Partially cloudy with light flurries. Light to moderate southeast winds. Alpine temperatures around -30 C.

Friday: Partially cloudy with light flurries. Alpine temperatures rising to -25 C. Light to moderate northwest winds.

Saturday: Mainly cloudy with flurries, up to 5 cm accumulation. Alpine temperatures around -25 C with strong to extreme southwest winds. 

Confidence

Moderate - Uncertainty is due to the limited number of field observations. Uncertainty is due to the extreme variability of wind effect on the snowpack.

Avalanche Summary

No new avalanches have been observed in the past 24 hours. 

If you are out in the mountains, let us know what you see by filling out a Mountain Information Network report! ?

Snowpack Summary

Easterly winds may continue to form reactive wind slabs on lee features at all elevations.

Recently formed wind slabs are most likely to be found on south and westerly aspects, but older wind slabs may be found on all aspects. Recently formed wind slabs may remain reactive to human triggers for longer than is typical due to the weak facets (sugary snow) they are sitting on.

The base of the snowpack is composed of crusts and weak faceted grains, particularly in thin snowpack areas. These deeply buried weak layers will create large, destructive avalanches if triggered.

Avoid likely trigger spots such as steep, rocky slopes, with a shallow or thin to thick snowpack.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Be aware of highly variable recent wind loading patterns.
  • The best and safest riding will be on slopes that have soft snow without any slab properties.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.

Regioni coperte