Avalog Join
Archived

Avalanche Forecast

Feb 21st, 2023–Feb 22nd, 2023
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
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: Coquihalla, Harrison-Fraser, Manning, Skagit.

25 to 40cm of new snow fell Monday night and Tuesday. Give the storm snow some time to settle and bond.

Confidence

Moderate

Avalanche Summary

At publishing time Tuesday afternoon there had been no reports of avalanche activity yet, however I would suspect there was a widespread natural storm slab avalanche cycle through the day.

Please continue to post your reports and photos to the Mountain Information Network.

Snowpack Summary

20-40 cm of new snow from the beginning of the week is being redistributed by primarily southwest winds switching to northerly.

A melt-freeze crust formed in mid-January is now buried up to 90-140 cm deep. In some areas, small facets are still found above the crust. This layer appears to be gaining strength but still remains a concern. The snow below this layer is well consolidated.

Snowpack depths are just below seasonal averages. Total amounts range from 150 to 300 cm at treeline, but decreases significantly below 1500 m.

Weather Summary

Tuesday Night

Mainly cloudy with clear periods. Light to moderate north and northeast wind. Treeline temperature -10 °C. Freezing level dropping to valley bottom.

Wednesday

Cloudy with sunny periods. Light to moderate northeast wind. Treeline temperature -12 °C.

Thursday

Mix of sun and cloud. Moderate northeast wind. Treeline temperature -13 °C.

Friday

Mix of sun and cloud. Light northerly wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.

Avalanche Problems

Storm Slabs

25-45cm of new snow accumulating Monday and Tuesday has formed reactive storm slabs. Deepest deposits will be found in lee terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Persistent Slabs

A crust formed in mid-January can be found down 70 to 90 cm. In some areas facets can be found sitting on the crust.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2.5