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Archived

Avalanche Forecast

Feb 6th, 2021–Feb 7th, 2021
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
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
3: Considerable
The avalanche danger rating at treeline will be considerable
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

Weather Forecast

Today will be cloudy with scattered flurries amounting to 5cm of accumulation. The alpine high will reach -8c with winds from the NW, 10-20km/h and the freezing level rising to 1000m. Trace accumulation is expected overnight as temperatures begin to plummet.  An arctic outflow pattern will take over leaving us with dry and very cold conditions.

Snowpack Summary

Strong winds combined with recent storm snow created isolated wind slabs and deep loading in alpine and exposed treeline areas. The January 26th persistent week layer is buried 60-80cm and consists of decomposing surface hoar in sheltered areas and a thin crust on solar aspects. The mid and lower snowpack is quite strong, with no current concerns.

Avalanche Summary

One new size 2.5 avalanche was observed in the highway corridor yesterday. 

Confidence

on Saturday

Avalanche Problems

Wind Slabs

Moderate snowfall and strong winds have continued unabated since the February 2nd storm, creating an isolated wind slab problem in the alpine and exposed areas at treeline.

  • Use caution in alpine lee areas. Recent snow is available for transport given the current winds.
  • Be cautious as you transition into wind affected terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2

Persistent Slabs

The Jan 26th layer down 60-80cm is consist of decomposing surface hoar in sheltered areas and a crust on solar aspects. Activity appears to be slowing down on this layer, though it remains reactive to human triggers in isolated areas at Treeline.

  • 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