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Archived

Avalanche Forecast

Apr 11th, 2018–Apr 12th, 2018
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Rising freezing level and solar input will increase avalanche hazard as the day progresses.

Weather Forecast

A mix of sun and cloud for the day with isolated convective flurries in the afternoon. Temps will range from 3 to -3 as the freezing level rises to1700m. Wind will be light from the south. Several pulses of precipitation will reach our area on Thursday and Friday with freezing levels around 1800m.

Snowpack Summary

A fresh surface crust formed by yesterdays rain up to 2300m and cool temps overnight exists on all aspects, with 5cm of new snow at higher elevations. Moist snow may be found below the crust in the top 20cm of the snowpack. Well-settled mid and lower snowpack with the Mar 15 crust complex down 70-90cm on solar aspects.

Avalanche Summary

Numerous natural loose wet avalanches yesterday from tree line and below due to the warm temps and rain to 2300m.Artillery avalanche control produced results up to sz 2.5 along the highway corridor yesterday.Avalanche activity has tapered off with a decent overnight freeze, but use caution on southerly aspects if the solar radiation is strong.

Confidence

Avalanche Problems

Loose Wet

The sun is expected to make an appearance today which will heat up solar aspects quickly and weaken the surface snow, resulting in potential avalanches.
Use extra caution on slopes if the snow is moist or wet.Avoid exposure to overhead solar avalanche terrain, avalanches may reach the end of run out zones.

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5

Persistent Slabs

70-90cm of settled snow sits on the mid March crust/facet combo and fails suddenly in the moderate-hard range in stability tests on solar aspects.
Be cautious with convexities and steep slopes on solar aspects.

Aspects: North, North East, East, South East, South.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 3