Avalanche Forecast
Issued: Mar 23rd, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Deep Persistent Slabs.
trettie,
Avalanche Canada
Continue to practice good group management, high mark steep slopes one at a time and minimize time below cornices.
Summary
Confidence
Avalanche Summary
Numerous size 1-1.5 wet loose avalanches triggered by solar radiation were reported on sunny aspects at upper elevations on Monday and Tuesday as well as one large natural cornice fall which did not trigger a slab on the slope below.
Snowpack Summary
Expect the snow surface to change throughout the day. A crust will likely be found at treeline and below and on sun exposed slopes in the morning. Moist snow could be found on these same slopes by mid day. Light flurries may bring fresh dry snow to upper elevations.
The middle of the snowpack is generally well-settled and strong.
A weak layer of large facets is found near the base of the snowpack. This layer could still be a concern in very shallow snowpack areas.
Weather Summary
Thursday Night
Cloudy with up to 5 cm of new snow possible. Light southerly winds and a Low of -4°C at 1500 m.
Friday
A mix of sun and cloud with the possibility of light flurries bringing up to 5 cm of new snow. Light variable winds and a High of -1°C at 1500 m. Freezing level rising to 1400 m.
Saturday
A mix of sun and cloud with the possibility of convective flurries bringing up to 10 cm of new snow. Light southwest winds and a high of -2°C at 1500 m. Freezing level rising to 1400 m.
Sunday
A mix of sun and cloud with the possibility of flurries bringing up to 5 cm of new snow. Moderate northeast winds and a high of -6°C at 1500 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet
- Minimize your exposure time below cornices.
Problems
Deep Persistent Slabs
A weak layer of facets exists near the base of the snowpack. The likelihood of human triggering is low given the layer's depth, but large triggers such as cornice failures or smaller avalanches in motion have the potential to produce very large avalanches with surprisingly wide propagation. Suspect terrain for human triggering includes steep, shallow, and rocky terrain where the snowpack transitions from thin to thick.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 24th, 2023 4:00PM
