Avalanche Forecast
Issued: Mar 9th, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
kdevine,
Avalanche Canada
Recent storm snow has been redistributed into pockets of wind slab at tree line and in the alpine and may continue to be reactive. Watch for denser, deeper drifts near ridge-crests and rollovers.
Summary
Confidence
Weather Forecast
TUESDAY NIGHT - Cloudy with clear periods / light northwest wind / alpine low temperature near -2 / freezing level 800 m
WEDNESDAY - A mix of sun and cloud with isolated flurries / light north wind / alpine high temperature near -1 / freezing level 1000 m
THURSDAY - Mainly sunny / light northwest wind / alpine high temperature near -2 / freezing level 1200 m
FRIDAY - Mainly cloudy / light to moderate west wind / alpine high temperature near 0 / freezing level 1300 m
Avalanche Summary
On Monday, there were a few size 1 natural wet loose avalanches reported.
Over the weekend, there were reports of numerous storm slabs releasing 20 cm deep in the recent storm snow across all aspects between 1700-2000 m. Small loose dry sluffs were also observed in steep terrain.
Snowpack Summary
Since Friday, the mountains in the south coast region have seen anywhere from 20-60 cm of snow that fell on a mix of previous surfaces, including a crust, wet snow, wind-pressed snow, and settled cold snow. The storm snow was accompanied by moderate to strong south winds, forming wind slabs on leeward slopes at upper elevations that may remain possible to trigger. Massive cornices exist on ridgelines, which can act as triggers on slopes below.
Below the recent snow, the snowpack consists of a series of rain crusts and settled snow that is well-bonded. See this helpful MIN report from the Hollyburn area.
Terrain and Travel
- Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.
- Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
- Minimize your exposure time below cornices.
Problems
Wind Slabs
Recent strong winds have had ample snow to drift into reactive wind slabs on lee features at upper elevations. Pay attention to the pattern of wind-drifting in the terrain where you are traveling and watch for cracking or changes in snow stiffness. Triggering large wind slabs on specific features remains possible.
Aspects: North, North East, East, South East, West, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 10th, 2021 4:00PM
