Avalanche Forecast
Issued: Apr 15th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Loose Wet and Wind Slabs.
jpercival,
Avalanche Canada
Watch for unstable snow on isolated features: windslabs in the high alpine, and loose wet avalanches on steep slopes that face the sun.
Expect variable snowpack conditions as we transition from winter to spring.
Summary
Confidence
Moderate
Avalanche Summary
No new avalanches were reported before 4 pm on Saturday.
We expect that anywhere that was sunny on Thursday or Friday would have seen numerous, small, wet loose avalanches triggered by the sun on steep slopes. Also, there may be small pockets of windslab on exposed alpine ridges that could avalanche under the weight of a human.
If you have any observations from this region, let us know what you are seeing by submitting a report to the Mountain Information Network.
Snowpack Summary
In the alpine and around treeline, 5-10 cm of new snow covers a frozen crust, with moist snow below.
The mid snowpack is generally settled and strong at treeline and above.
A melt-freeze crust that was buried in mid January can be found 60 to 100 cm below the snow surface.
A weak layer of large, sugary crystals persists at the base of the snowpack. This layer has not produced recent avalanche activity in this area, but professionals continue to monitor for signs of it becoming active.
Weather Summary
Saturday Night
Mostly clear, no new snow expected. Freezing level falling to valley bottom. Treeline low around -7 °C Light building to moderate southwest ridgetop wind.
Sunday
Mix of sun and cloud . No new snow expected. Freezing level rising to 2300m. Treeline high around 3°C. Moderate southwest ridgetop wind.
Monday
Partly cloudy. Possible 1-5 cm of snow in the alpine. Freezing level at 500 m overnight, rising to 1600 m. Strong southwest ridgetop wind.
Tuesday
Mostly clear, no new snow expected. Freezing level falling to valley bottom at night and rising to 1500 m mid day. Treeline low around -7 °C Light southwest ridgetop wind.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Watch for unstable snow on specific terrain features, especially when the snow is moist or wet.
- Be alert to conditions that change throughout the day.
- Be alert to conditions that change with aspect and elevation.
- Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
Problems
Loose Wet
During periods of daytime warming and sunshine, expect the surface snow to be unstable on slopes that face the sun.
A wet storm added a lot of moisture and heat to the upper snowpack earlier this week.
If you see signs of loose wet instability, like snow that feels like a slurpy, or clumps up and pinwheels down a slope, move to less steep and more shaded terrain.
Aspects: South East, South, South West, West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Wind Slabs
Some dry snow remains on shaded slopes at high elevations. If the wind picks up, small windslabs could form below ridgetops.
Carfully evaluate for windslab hazard before committing to bigger features.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 16th, 2023 4:00PM
