Avalanche Forecast
Issued: Apr 6th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
ldreier,
Avalanche Canada
Up to 15 cm snow will fall by the end of the day on Thursday with moderate to strong southwest wind. Wind slabs will form throughout the day and be reactive to human triggers.
Summary
Confidence
Moderate - Uncertainty is due to the track & intensity of the incoming weather system.
Weather Forecast
Wednesday night: Cloudy, up to 5 cm snow, strong southwest wind, alpine low -4 °C, freezing level around 800 m.Â
Thursday: Cloudy, 5-10 cm snow, moderate southwest wind, alpine high 0 °C, freezing level around 1300 m.
Friday: Mix of sun and cloud, 5-10 cm snow, moderate to strong westerly wind, alpine high -2 °C, freezing level around 1000 m.
Saturday: Mix of sun and cloud, trace of new snow, moderate west wind, alpine high -6 °C, freezing level around 700 m.
Avalanche Summary
On Wednesday, a small (size 1) wind slab avalanche was observed in a cross-loaded feature near ridgetop.Â
A naturally triggered size 2 wind slab avalanche was reported on a steep cross-loaded alpine feature on Tuesday. Many small dry loose avalanches were observed as well.Â
Snowpack Summary
The new snow will add to the 10-40 cm of recent snow which overlies a hard melt-freeze crust.
Recent moderate southwest winds removed the snow above the crust in wind-exposed areas and formed wind slabs on lee terrain features at treeline and above.
Cornices are very large and exposure to them should be minimized, especially during warm or windy weather.
Terrain and Travel
- 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.
- Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
Problems
Wind Slabs
Up to 15 cm snow will fall by the end of the day Thursday. Moderate to strong southwest wind will redistribute the snow and form fresh wind slabs throughout the day in lee terrain features in the alpine and at treeline. Wind slabs will be reactive to human triggers.
Use ridges or ribs to avoid areas of wind-loaded snow.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 7th, 2022 4:00PM
