Avalanche Forecast
Issued: Feb 4th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Deep Persistent Slabs and Wind Slabs.
GL,
Avalanche Canada
Strong winds continue to build wind slab at treeline and above. Watch for wind slab development farther down slopes than usual. Tuesday may bring a 20-30cm storm but weather models are uncertain.
Summary
Confidence
Moderate
Avalanche Summary
Feb 4th Icefield patrol was good visibility. Nothing new was observed. On Jan 31st, a skier triggered a size 1 avalanche in the Buck Lake area.
Don't forget to post avalanche observations to the MIN.
Snowpack Summary
Strong southwest wind is stripping snow in exposed alpine features and creating wind slab into exposed tree line. A thin melt freeze crust down 25cm below 2100m is showing sudden collapse results in snow pit tests below this layer on facets. Generally, the bottom of the snowpack is weak facets and depth hoar. The snowpack ranges from 50 to 120cm.
Weather Summary
Sunday will be clouds, sun, flurries, -5 °C, and moderate West winds. Monday could bring 5cm of snow and moderate Southwest winds. Tuesday will be snow and possibly up to 20cm with moderate to strong winds.
Detailed weather forecasts from Avalanche Canada: https://www.avalanche.ca/weather/forecast
Terrain and Travel Advice
- In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.
- Watch for signs of slab formation throughout the day.
Problems
Deep Persistent Slabs
The bottom of the snow pack is inherently weak with well developed Facets and Depth Hoar. Avalanches initiating in the upper snowpack are likely to step down to this layer and gain significant mass.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Wind Slabs
Strong to extreme winds are building wind slabs with the recent snow. Watch for wind slab development on top of the Jan 27th melt freeze crust.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 5th, 2023 4:00PM
