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Archived

Avalanche Forecast

Apr 1st, 2021–Apr 2nd, 2021
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
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

Watch for fresh pockets of windslab if you can see transport at ridgetop.

Scale back your exposure on slopes that have a buried suncrust if/when the sun pops out this afternoon.

Weather Forecast

A weak cold front passing this afternoon/evening will give increasing wind and isolated flurries.

Today: Mostly cloudy with isolated flurries. Alpine high -2 C. Ridge wind light gusting strong SW. Freezing level 1800m.

Tonight: Clear periods. Low -8 C. Light-mod SW wind.

Friday: Isolated flurries. Alpine High -6 C. Light SW wind.

Sat: Flurries (12 cm).

Snowpack Summary

A fresh breakable crust on solar aspects may break down if the sun comes out this afternoon. Recent winds have built pockets of slab in alpine and treeline lees.  The March 18th layer (a crust on Solar aspets and isolated surface hoar on sheltered Northerly aspects) is now buried 60-100cm depending on aspect and elevation. Cornices are huge.

Avalanche Summary

No new avalanches were observed on Wednesday.

A skier accidental occurred Tuesday in the Teddy Bear Trees. The slab avalanche was a healthy size 3, and failed on the March 18th melt-freeze crust. There was also a MIN report of a skier accidental and skier remote avalanche in the Hermit Moraines area Tuesday, click here for more details.

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Wind in the wake of last weekends storm built pockets of windslab in lee terrain.  Increasing wind this afternoon may build on this problem.

  • Use caution in lee and cross-loaded terrain near ridge crests.

Aspects: North, North East, East, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Skier triggering of a large avalanche on this layer, on a SE aspect, on Tuesday, shows that this layer may persist as a low probability high consequence problem.

  • Assess start zones carefully and use safe travel techniques.

Aspects: East, South East, South, South West, West.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 3.5