Avalanche Forecast
Issued: Apr 24th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Cornices.
jsmith,
Avalanche Canada
Recent snow and southerly wind may have formed fresh wind slabs on lee features in the alpine.
Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
Summary
Confidence
Low
Avalanche Summary
No avalanches were reported on Sunday. However, observations in this region are currently very limited.
Observations are limited at this time of year, please consider sharing any information or photos you have on the Mountain Information Network to help guide our forecasts.
Snowpack Summary
Recent snow and southerly wind may have formed fresh wind slabs on lee features in the alpine.
Cornices are very large and loom over slopes below like gargoyles. Cornice falls may trigger large avalanches on the slopes below.
A robust crust exists on all aspects up to approximately 1400 m and to ridgetop on sunny aspects.
A weak layer of surface hoar/crust/facets buried in early January is now around 100 cm down in most areas. A significant warming event or a large trigger (like a falling cornice) are the most likely things to activate this layer.
Weather Summary
Monday Night
Partly cloudy with isolated flurries; 0-5 cm / 30 km/h southwest ridgetop wind / Temperature at treeline around -5 C / Freezing level valley bottom
Tuesday
Mix of sun and cloud / 30 km/h southwest ridgetop wind / Temperature at treeline around -2 C / Freezing level 800 m
Wednesday
Cloudy with isolated flurries; 3-5 cm / 25 km/h south ridgetop wind / Temperature at treeline around 1 C / Freezing level 1100 m
Thursday
Cloudy with isolated flurries; 0-5 cm / 60 km/h south ridgetop wind / Temperature at treeline around 1 C / Freezing level 1100 m
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
- Wind slabs may be poorly bonded to the underlying crust.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
- Cornice failure may trigger large avalanches.
Problems
Wind Slabs
Recent snow and southerly wind may have formed fresh wind slabs on lee features in the alpine.
Aspects: North, North East, East, West, North West.
Elevations: Alpine.
Likelihood
Expected Size
Cornices
Cornices are very large and loom over slopes below like gargoyles. Cornice falls may trigger large avalanches on the slopes below.
Aspects: North, North East, East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 25th, 2023 4:00PM
