Avalanche Forecast
Issued: Nov 28th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
jsmith,
Avalanche Canada
Recent winds have shifted to the east and may form fresh wind slabs on aspects that are generally windward.
Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
Summary
Confidence
Moderate
Avalanche Summary
Check out this MIN report of a skier triggered wind slab avalanche that occurred on a south aspect at treeline on Sunday.
Another MIN from Sunday has photos of wind slab avalanches that likely occurred during the storm on Saturday.
Snowpack and avalanche observation data are currently very limited in this region. Please consider posting your observations to the MIN. (Mountain Information Network)
Snowpack Summary
Recent winds have shifted to the east and may form fresh wind slabs on aspects that are generally windward.
Last week's storm that delivered 50-100 cm of snow and strong southwest ridgetop winds created thick wind slabs on lee aspects at treeline and above.
The recent snow overlies a variety of problematic snow surfaces including facets and crusts. Below this, the snowpack is generally shallow and weak.
The depth of the snowpack at treeline varies from 80-140 cm and tapers rapidly below treeline.
Many early-season hazards such as rocks, stumps, and open creeks exist below treeline.
Weather Summary
Monday Night
Partly cloudy / Light east ridgetop winds / Low temperature at treeline -21 C
Tuesday
Mix of sun and cloud / Moderate east ridgetop winds / High temperature at treeline -17 C
WednesdaySunny / Strong east ridgetop winds / High temperature at treeline -20 C
ThursdayIncreasing cloudiness / Light southwest ridgetop winds / High temperature at treeline -21 C
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Recent wind has varied in direction so watch for wind slabs on all aspects.
- Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
- Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
- Use ridges or ribs to avoid areas of wind loaded snow.
Problems
Wind Slabs
Lingering wind slabs formed by the strong southwest winds that accompanied the storm ending on the weekend are likely becoming stubborn to trigger in many areas.
Recent winds have shifted to the east and may form fresh wind slabs on aspects that are generally windward.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Nov 29th, 2022 4:00PM
