Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Feb 5th, 2019–Feb 6th, 2019
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
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

Regions: Glacier.

With Natural avalanche activity subsiding, the lingering chance of human triggering is still probable on specific terrain features. Most avalanche accidents occur during the first few sunny days after a major storm!"

Weather Forecast

Cold and clear today with a mild inversion and light winds today. Tomorrow we'll see much of the same. Flurries for Thursday, Friday, then back to sunshine, and high pressure for the weekend.

Snowpack Summary

~70cm of storm snow overlies the Jan 17th SH and ~60cm over the Jan 31st layer. Strong winds that came with the storm redistributed the storm snow in the alpine and exposed areas of TL. Wind slabs and buried crusts exist on specific terrain features depending on aspect and elevation. Low-density new snow can be found in sheltered locations.

Avalanche Summary

Only one natural in the park yesterday between Grizzly Couloir and Little Sifton; a size two, possibly triggered by a cornice, Sth asp in the Alp. One skier controlled size 1, on Puff Daddy, BTL, SE asp. There was a large cycle on the weekend with many slides running full path. Natural activity has subsided significantly over the past 48 hours.

Confidence

Due to the number and quality of field observations

Avalanche Problems

Persistent Slabs

The Jan 17th Surface Hoar layer is now down 60-80cm. This layer exists on all aspects, and is most problematic between 1400-1900m and on steep solar aspects where it overlies a 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 - Likely

Expected Size: 1.5 - 2.5

Wind Slabs

70cm of storm snow, plus strong to extreme Southerly winds created wind and storm slabs over the weekend. On Sunday Strong NE winds relocated our storm snow again into wind slabs on specific terrain features at all aspects.
Watch for whumpfing, hollow sounds, and shooting cracks.Use conservative route selection, choose moderate angled and supported terrain with low consequence.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1.5 - 2.5