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Archived

Avalanche Forecast

Feb 20th, 2024–Feb 21st, 2024
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
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: Birkenhead, Duffey, South Chilcotin, South Coast Inland, Stein, Taseko.

Use caution in wind effected terrain, wind slab over facets, surface hoar or a crust remains the primary concern.

Confidence

Moderate

Avalanche Summary

Check out this MIN with some recent avalanche observations.

Over the past week we have seen a pattern of human and remotely triggered size 1 to 1.5 wind slab avalanches with a few being up to size 2.  These avalanches have generally failed  on a combination of facets, surface hoar and a crust.

Snowpack Summary

Up to 10 cm of new snow could accumulate over a variety of surfaces including; a crust on south aspects and all aspects at lower elevation, Surface hoar in sheltered features and previously wind effected surfaces in exposed terrain.

Old wind slabs that formed over facets, a crust or surface hoar can still be found on south and west aspects.

15 to 40 cm of snow sits above a widespread crust from late January. Surface hoar may be found above this crust.

Snowpack depths decrease rapidly below treeline.

Weather Summary

Tuesday Night

Mostly cloudy with around 5 cm of new snow expected. 10 to 25 km/h south alpine wind. Treeline temperature -2°C.

Wednesday

Clearing sky throughout the day with up to 5 cm of new snow expected  in the morning. 10 to 25 km/h southeast alpine wind. Freezing level rising to 1700 m.

Thursday

A mix of sun and cloud with trace amounts of new snow expected in the morning. 5 to 15 km/h southeast alpine wind. Freezing level rising to 1500 m.

Friday

A mix of sun and cloud with trace amounts of new snow possible. 30 to 50 km/h southwest alpine wind. Treeline temperature -2°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use ridges or ribs to avoid areas of wind loaded snow.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Surface hoar distribution is highly variable. Avoid generalizing your observations.

Avalanche Problems

Wind Slabs

Winds have varied in direction over the past few days, wind slabs could be found on all aspects. These slabs will be most reactive where they overlie surface hoar and/or a crust.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2