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Archived

Avalanche Forecast

Feb 14th, 2021–Feb 15th, 2021
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
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
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.

The wind changed direction in some drainages yesterday. Watch for windslabs in unusual places

Weather Forecast

Staying cold for today with a high of -14. The wind is forecast to be light from the SW, be aware of increasing winds if they occur. A low pressure system will move across the province over the next few days with increasing cloud cover and flurries of snow beginning tomorrow. Tuesday winds will pick up to moderate from the W.

Snowpack Summary

The cold has weakened cornices and the upper snowpack. Widespread wind effect in the alpine has made for variable travel. The January weak interface down 70-100 is reducing in strength with facetting due to the cold. The mid and lower snowpack are still relatively strong having rounded under previous mild temperatures and snow load.

Avalanche Summary

Numerous skier triggered and natural windslabs were observed from both lee and crossloaded features over the last few days to sz 2.5.

A group of skiers had a close call Wednesday on the South face of Corbin Peak, triggering a couple of large avalanches on the Jan 24th persistent weak layer.

Confidence

The weather pattern is stable

Avalanche Problems

Wind Slabs

Mod-strong winds yesterday came from different directions in different drainages yesterday. Look for signs of the recent local wind direction. Features can be crossloaded where terrain is bowled or gullied containing multiple aspects.

  • Use caution on steep lee and cross-loaded slopes
  • Be careful with reverse loaded pockets of wind slab at ridgeline.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5

Persistent Slabs

The January 24th weak interface may be triggerable on solar aspects, where facets and/or surface hoar is sitting on a suncrust.

The bond at this interface may be weakening with facets having grown under recent cold temperatures

  • Dig down to find and test weak layers before committing to a line.
  • Be wary of slopes that did not previously avalanche

Aspects: South East, South, South West.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 3