Avalanche Forecast
South Coast Inland
Snow is forecasted for Saturday with associated strong winds. Be cautious of periods of rapid precipitation or wind loading, as avalanche activity may increase.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Use ridges or ribs to avoid pockets of wind-loaded snow.
- Minimize exposure during periods of heavy loading from new snow, wind or rain.
- Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.
Avalanche Problem 2: Cornices
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Cornices are very large and fragile. Give them a large berth if travelling on ridges and avoid travelling underneath them, as they can trigger large avalanches.
Travel and Terrain Advice
- Give cornices a wide berth when travelling on ridges.
- Avoid travelling on slopes below cornices.
Avalanche Problem 3: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
A weak layer buried 40 to 70 cm is still surprising people and producing large and destructive avalanches. Be particularly cautious around upper treeline and alpine terrain on shady aspects, where this layer is most likely to be a problem.
Travel and Terrain Advice
- Pay attention to overhead hazards like cornices, which could trigger persistent slabs.
- Avoid steep terrain or areas with a thin or variable snowpack.
- Be aware of the potential for wide propagation due to the presence of buried weak layers.
Avalanche Summary
On Thursday, numerous small loose wet avalanches were triggered by skiers in steep terrain on all aspects from 2100 m to valley bottom.
Snowpack Summary
New snow and strong southwesterly winds created new slabs at higher elevations. This snow overlies various old surfaces including previous storm snow, melt freeze crusts on sunny aspects, and old wind slabs. On ridges, cornices are reported to be large and fragile. At lower elevations, precipitation is falling as rain and creating wet snow conditions.
A weak layer consisting of surface hoar, facets, or a sun crust from late March is now buried about 40 to 70 cm. This layer is spotty in its distribution. It is mostly likely to be problematic on shady aspects between 1900 m and 2250 m.
The mid and lower snowpack are strong and well-settled.
Weather Forecast
SATURDAY: Cloudy with snowfall, accumulation 10 to 20 cm, strong southwesterly winds, alpine temperature -3 C, freezing level 1500 m.
SUNDAY: Mostly cloudy with light snowfall, accumulation 2 to 5 cm, light westerly winds, alpine temperature -3 C, freezing level 1500 m.
MONDAY: Partly cloudy, light southwesterly winds, alpine temperature -3 C, freezing level 1600 m.
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Snowfall on Saturday with strong winds will form new slabs. Observe for the bond of new snow with the old surface before committing into avalanche terrain.