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Archived

Avalanche Forecast

Dec 3rd, 2017–Dec 4th, 2017
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
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: Kananaskis.

The winds have yet to arrive which seems so rare!  Watch for pockets of skier triggerable wind slabs along ridgelines, mainly on N and E aspects.  Good skiing in sheltered areas!

Confidence

High -

Weather Forecast

A mix of sun and cloud is expected on Monday.  Precipitation: Nil.  Alpine temperature: High -9 C.  Ridge wind west: 30 km/h.  Freezing level at valley bottom.

Avalanche Summary

A few sz 2 avalanches were observed in steep E facing alpine terrain failing 30-50cm deep. Some may have been triggerred by loose sluffing from above. One noteable sz 2.5 avalanche was seen on the E face of Snow Peak that may have been triggerred by a cornice collapse and occurred within the past 24-48hrs. The depth on this slide was estimated to be at least 50cm deep, 100m wide and ran an unknown distance.

Snowpack Summary

A few additional cm of new snow overnight and generally light winds except above 2900m where some snow transport was observed. So far the upper snowpack is continuing to settle and we are not seeing any results on the Nov CRs. A weak layer of facetted crystals is being observed below the Halloween crust that is continuing to produce moderate to hard results deeper in the snowpack. In alpine terrain you should expect to encounter pocket of windslabs 30-50cm thick along ridgelines, below cliff faces and along cross loaded slopes. Use caution in these areas.

Avalanche Problems

Wind Slabs

Recent windslabs 30-50cm deep are being encountered in Alpine on N and E aspects.  These slabs do not extend far downslope but are definetly at the entrances to runs so use caution. 
Watch for areas of hard wind slab in steep alpine features.Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: North, North East, East, South East.

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Persistent Slabs

Remember, in shallow areas it is still possible to trigger the deeper layers and wake up the weak facets around the october crust
Be cautious in shallow snowpack areas where triggering is more likely.Be aware of the potential for wide propagations.

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3