Avalanche Forecast
Issued: Apr 20th, 2023 4:00PM
The alpine rating is Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeRecent wind has varied in direction so watch for lingering wind slabs on all aspects at upper elevations.
Summary
Confidence
Low
Avalanche Summary
No avalanches were reported on Wednesday. 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
In the alpine, 20-30 cm of recent snow and moderate south wind formed wind slabs in isolated lee features. A robust crust exists on all aspects up to approximately 1400 m and to ridgetop on south aspects.
Cornices are large and loom over slopes below like gargoyles.
A weak layer of surface hoar/crust/facets buried in early January is now around 100 cm down in most areas. Operators continue to monitor this layer. A significant warming event or a large trigger (like a falling cornice) are the most likely things to activate this layer.
Weather Summary
Thursday Night
Partly cloudy / 20 km/h east ridgetop wind / Temperature at treeline around -4 C / Freezing level valley bottom
Friday
Mostly cloudy / 20 km/h east ridgetop wind / Temperature at treeline around -3 C / Freezing level 1200 m
Saturday
Mix of sun and cloud with isolated flurries; 0-10 cm / 20 km/h east ridgetop wind / Temperature at treeline around -2 C / Freezing level 1300 m
Sunday
Cloudy with isolated flurries; 0-5 cm / 20 km/h southeast ridgetop wind / Temperature at treeline around -1 C / Freezing level 1400 m
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Carefully evaluate steep lines for wind slabs.
- Recent wind has varied in direction so watch for wind slabs on all aspects.
- Cornice failure may trigger large avalanches.
Problems
Wind Slabs
Recent wind has varied in direction so watch for lingering wind slabs on all aspects at upper elevations.
Aspects: All aspects.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 21st, 2023 4:00PM