Bollettino valanghe

Kootenay Boundary

Dec 23, 2016Avalanche Canada
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Archiviato · scaduto 10 years ago

Pericolo valanghe

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

In sintesi

As this past week's storm snow continues to settle it will still be important to evaluate the bond between the old snow surface and the new snow. There is still potential for a weak sliding layer in isolated sheltered areas.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Moderate to strong southwest winds continue to create slabs in the lee of terrain features

Confidence

Moderate - Forecast snowfall amounts are uncertain on Saturday

Weather Forecast

Friday: Flurries, accumulation 5-10cm / Light east wind / Alpine temperature -7Saturday: Flurries, accumulation 5-10cm/ Light east wind / Alpine temperature -7Sunday: Mainly cloudy / Light west wind / Alpine temperature -9

Avalanche Summary

Recent reports in the past few days indicate a few wind slabs avalanches triggered from explosives control running on the storm/old snow interface to size 2 at tree line and above.

Snowpack Summary

20-40 cm of new snow from earlier in the week has buried old wind slabs, facets and surface hoar. There is a bit of uncertainty regarding how the new snow is bonding to old surfaces which formed during last week's cold clear period. Moderate to strong winds have loaded leeward features with wind slabs. A widespread crust that was buried in November is typically down 80-100cm. Recent tests show variable results with this persistent weakness. Some show results as hard and resistant and other show it may have the propensity to propagate if triggered from thin rocky areas.

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