Bollettino valanghe

Lizard-Flathead

Dec 11, 2018Avalanche Canada
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Archiviato · scaduto 8 years ago

Pericolo valanghe

Wed
Thu
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Snow amounts should remain light on Tuesday. If more than 15 cm new snow arrives, bump danger to Considerable for windy areas.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Strong wind will transport loose snow and potentially form reactive slabs in the alpine. Wind slabs have the potential for wide propagations if they step down to the weak snow in the lower snowpack.

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

Monday Night: Only trace amounts of new snow expected overnight.Tuesday: 4-8 cm new snow expected with moderate southwesterly winds. Freezing level rising to around 600 m at the end of the day. A further 10-20 cm possible Tuesday night. Wednesday: Flurries. Moderate northwesterly winds. Freezing level around 1200 m.Thursday: Light snow, 2-4 cm. Strong southwesterly winds. Freezing level rising to around 1400 m.

Avalanche Summary

Recent avalanche activity has been limited to a few small wind slabs and loose dry avalanches, mostly in steep alpine terrain.The last notable avalanche was a size 2 human triggered avalanche on December 2nd in Cornice Bowl north of Fernie. It occurred on a northwest facing feature at 2300 m and ran on a crust layer. There are good photos in this MIN report.

Snowpack Summary

Early season conditions prevail in this region with roughly 100 cm of snow in alpine areas and much less at lower elevations. Surface conditions range from soft power, to hard wind slab, and some sun crusts.See the snow profile in our field team's MIN report for a visual representation of the snowpack here. The main concern is a combination of weak facets and crusts in the bottom half of the snowpack. The crust is most prevalent at and above treeline and is likely most problematic on north-facing features, especially those that are large and planar in nature. A layer of large surface hoar can also be found at similar depths in some areas, as found in a recent MIN report here.

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