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Archived

Avalanche Forecast

Feb 8th, 2021–Feb 9th, 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
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
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

Regions: Glacier.

Bring extra layers today. Be prepared to keep yourself and your group warm if trouble arises.

Isolated soft slab at Alpine and Tree-line elevations are stubborn to move, but can still be triggered by a person.

Weather Forecast

I left the Cdn Rockies to get away from this cold weather...

Today/tonight: A mix of sun and cloud. No precip. Alpine high -22*C. Light NW wind.

Tues: Mix of sun and cloud. Alp high -20*C, light SW winds

Wed: Isolated flurries, Alp high -20*C, light S winds

Thurs: Clear, Alp high -26*C, light E winds

Snowpack Summary

Snow from the Feb 2 storm was redistributed by strong S winds, then switched to NW'ly. Isolated pockets of soft slab can be found at ridge-top lee areas. Cold temps are beginning to lock this layer in. The Jan 26 persistent weak layer is buried 60-80cm and consists of decomposing surface hoar in sheltered areas and a thin crust on solar aspects.

Avalanche Summary

The Lens Gully on Tupper spit out a natural sz 3 avalanche yesterday from extreme terrain. Otherwise, no new avalanches noted in the highway corridor.

A field team in the Fidelity area skied to 2400m and noted minor cracking around skis and some loose sluffing in steep (40*) open trees.

Confidence

The weather pattern is stable

Avalanche Problems

Wind Slabs

Pockets of soft slab exist in the alpine and immediate tree-line lee features. They have been stubborn to move, but demand respect in steeper, more committing start zones.

  • Be careful with reverse loaded pockets of wind slab at ridgeline.
  • Be cautious as you transition into wind affected terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

The Jan 26th layer, down 60-80cm, consists of decomposing surface hoar in sheltered areas and a crust on solar aspects. Reactivity appears to be decreasing on this layer. It is stubborn to human triggers in isolated areas in the alpine and tree-line.

  • Recent snow may be more sensitive to human triggering on solar aspects where it sits on sun crust
  • Use caution on open slopes and convex rolls at treeline where buried surface hoar may be preserved.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Possible

Expected Size: 2 - 3