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Archived

Avalanche Forecast

Feb 6th, 2018–Feb 7th, 2018
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
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Kananaskis.

Good skiing today.  Wind slabs in the alpine.  We are at a transition where natural avalanches have slowed down, yet human triggered avalanches are still a concern.

Confidence

-

Weather Forecast

Wednesday is to bring cloudy skies with scattered flurries.  Alpine temperatures will be around -7c with west winds of 30km/h.  The next snow is to begin late Wednesday night and bring around 20cm by the end of Thursday.

Avalanche Summary

One size 2 avalanche was noticed near the summit of Mount Nestor.

Snowpack Summary

The recent HST has settled to 40-50cm.  Wind slabs are present on all aspects in the alpine.  Jan 6 SH was found down 90cm at 2000m with no results; yet it was very reactive one valley over two days ago.  We have low confidence in adventuring into big terrain.

Avalanche Problems

Wind Slabs

Present on all aspects
Use caution in lee areas. Recent wind loading have created wind slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1.5 - 3

Persistent Slabs

The Jan 6th surface hoar is down 100cm and the Dec 15 is down 120cm.  Any slide on these layers would produce large avalanches.
Carefully evaluate terrain features by digging and testing on adjacent, safe slopes.Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 3.5