Avalanche Forecast
Issued: Feb 6th, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
kdevine,
Avalanche Canada
Changing wind directions means that wind slabs may be found on any aspect. Pay close attention to conditions as you enter wind exposed areas. Stick to conservative terrain and watch for signs of instability such as whumpfing, cracking and recent avalanches.
Summary
Confidence
Weather Forecast
SATURDAY NIGHT - Mainly cloudy with a few flurries, 3-5 cm / moderate northwest wind / alpine low temperature near -20
SUNDAY - Cloudy with sunny periods and isolated flurries / moderate northwest wind / alpine high temperature near -18
MONDAY - Cloudy with sunny periods and isolated flurries / light northeast wind / alpine high temperature near -23
TUESDAY - A mix of sun and cloud / light northwest wind / alpine high temperature near -19
Avalanche Summary
Recent fresh snow has likely formed reactive wind slabs in wind loaded areas. Changing wind directions will mean that these wind loaded areas may potentially be found on any aspect.
On Friday there was a report of a size 2 explosives triggered wind slab avalanche, as well as a few size 1 human triggered dry loose avalanches. There was also a report of several natural avalanches, potentially up to size 3, a MIN report outlining these can be found here.
On Wednesday, numerous loose-dry natural avalanches were reported up to size 1.
Snowpack Summary
Up to 45 cm of new snow fell over the past few days. The new snow was accompanied by strong winds, which likely redistributed some of this snow to leeward slopes and terrain features, forming fresh and reactive storm and wind slabs.
Up to 70 cm of recent new snow sits above a plethora of older snow surfaces. In the alpine and at treeline the buried interface consists of stiff, wind affected snow, facets, surface hoar in isolated areas sheltered by the wind, and a crust on steep solar aspects. Below 1900 m a thick crust can be found underneath the recent snow.
A solid mid-pack sits above deeply buried decomposing crust and facet layers near the bottom of the snowpack (80-150 cm deep). Though unreactive under the current conditions, steep rocky slopes and shallow snowpacks should still be approached with caution.
Terrain and Travel
- Avoid freshly wind loaded terrain features.
- Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
- Avoid terrain traps where the consequence of any avalanche could be serious.
- Be carefull with sluffing in steep terrain, especially above cliffs and terrain traps.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
Problems
Wind Slabs
Recent variable wind direction will mean that wind slabs may be found on all aspects. A weak interface may exist in some locations approximately 60 cm down and could reach its threshold with wind loading, initiating a deeper slab. At this point, this interface seems spotty through the region and hasn't been as reactive as in the Lizard-Flathead region. However, it is something to keep on your radar.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Feb 7th, 2021 4:00PM
