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Archived

Avalanche Forecast

Apr 4th, 2015–Apr 5th, 2015
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
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: Jasper.

10 cm of snow overnight with light East winds will improved ski quality.  Enjoy winter while we still have it!

Weather Forecast

The expected storm has been delayed.  10 cm of snow is expected overnight on Saturday and then another 10 cm on Sunday with light East winds.  Temperatures will remain cool.  Flurries on Monday with an additional 5 cm possible.  A clear warm trend begins on Tuesday.

Snowpack Summary

Pockets of wind pressed and soft wind slabs near ridgelines on Northerly aspects at alpine and treeline elevations. Suncrust on solar aspects.  5-10 cm over a supportive temperature crust can be found on all aspects tree line and above to 2500m. The weak basal facet layer is bridged by a strong mid-pack in most areas at treeline and above.

Avalanche Summary

Patrols up Maligne and to the Icefields yielded no new avalanche observations.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

Avalanche Problems

Wind Slabs

Pockets of wind pressed snow and  windslabs can be found on lee aspects and cross loaded features at treeline and above.
Use caution in lee areas. Recent wind loading have created wind slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

Large cornices or surface avalanches are the likely trigger for this deep persistent weak layer.
Give cornices a wide berth when travelling on or below ridges.Be aware of thin areas that may propogate to deeper instabilites.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3