Avalanche forecast

Kootenay Boundary

Nov 22 – 23, 2013Avalanche Canada
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Avalanche danger

Sun
Mon
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
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Highlights

This forecast is based on limited field data.  Feel free to send any observations to [email protected].

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–4
    Expect wind slabs to be lingering on lee features in the alpine. Triggering a wind loaded feature might be enough load to cause a large avalanche on the deeper rain crust

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    3–5
    Reports indicate that there is a crust down 70cm at and above tree line. Where the crust is smooth or is overlayed by facets this layer might be able to produce avalanche up to size 2 to 3.

Confidence

Poor - Due to the number and quality of field observations on Friday

Weather Forecast

A high pressure system is forecast to persist through the weekend bringing dry conditions. A weak inversion could cause temperatures to approach zero degrees in the high alpine.Saturday: Light winds from the NW. Clear skies. High of -4C at 1500mSunday: Light winds from the NW. Becoming cloudy. High of -4C at 1500mMonday: Light winds from the NW. Cloudy skies. High of -3C at 1500m

Avalanche Summary

Explosive avalanche control earlier on Tuesday, November 19th produced storm snow slab avalanches up to size 2 in the Southern Selkirks.

Snowpack Summary

Reports from Kootenay Pass suggest that about 100cm of snow can be found at treeline in the area. Observations are limited and this amount may vary dramatically across the region.The storm earlier this week deposited 30cm of new snow in the alpine. Roughly 60 to 70cm of snow is now sitting on a widespread crust from early October.

Regions covered