Avalanche forecast

Northwest Inland

Jan 9, 2019Avalanche Canada
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Archived · expired 8 years ago

Avalanche danger

Thu
Fri
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low

Highlights

Wind slabs are likely to be encountered at upper elevations and may be reactive to human triggering.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    Recent new snow combined with strong winds have promoted wind slab development.

Confidence

Low - Due to the number of field observations

Weather Forecast

TUESDAY NIGHT - Flurries, 5 cm / southeast winds, 20-40 km/h / alpine low temperature near -14WEDNESDAY - Cloudy with flurries, up to 5 cm / southeast winds, 20-40 km/h / alpine high temperature near -8 THURSDAY - Periods of snow, 5-10 cm / southwest winds, 30-60 km/h / alpine high temperature near -1 FRIDAY - Periods of snow, 10-15 cm / south winds, 40-80 km/h / alpine high temperature near +1 / freezing level 1200 m

Avalanche Summary

A natural avalanche cycle to size 2 was reported in the region on Sunday night due to strong to extreme winds in some parts of the region.

Snowpack Summary

10-15 cm of new snow sits above previous wind-scoured surfaces as well as wind slabs in lee terrain features. Below treeline, expect to find a melt-freeze crust near the snow surface.A few buried weak layers that consist of surface hoar (feathery crystals) and/or faceted (sugary) snow may exist in some sheltered areas. The upper layer was buried around December 31 and is about 20-30 cm deep. The next layer may have been buried around December 22 and is likely 40-60 cm deep. The lower one was buried in early December and is now approximately 80-120 cm deep. The bottom 30 to 50 cm of the snowpack consists of facets and crusts, particularly in areas where the snowpack is thin. It is possible that wind slab avalanches could scrub down to ground in thin snowpack areas, resulting in large, full depth avalanches.

Regions covered