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Archived

Avalanche Forecast

Nov 29th, 2019–Nov 30th, 2019
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
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: Glacier.

Enjoy the cold clear weather and be back to the trailhead early on these short days.

Weather Forecast

Cold and dry conditions today with an alpine high of -8C and light easterly ridge crest winds. Freezing levels will remain well below valley bottom. Into the weekend the forecast calls for more cold and dry for Saturday and a warming trend beginning on Sunday as the arctic ridge starts to break down.

Snowpack Summary

Strong Northerly winds have redistribute last weekend's storm snow on alpine and treeline lee features, caution, reverse loading. Cold temperatures should soften former surface slabs in protected areas. The 2 main layers to watch for are the Nov 23rd Surface Hoar, buried 30-50-cm, and the Nov 17th interface.

Avalanche Summary

One size 2.5 slab avalanche came out of MacDonald Gulley 2 yesterday running half way down the runout zone. No new avalanches reported in the backcountry.

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Reverse loaded windslabs have formed along exposed features and in the immediate lee of ridgelines from moderate to strong N through E winds.

  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
  • Keep an eye out for reverse loading created by North through East winds.

Aspects: South East, South, South West, West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Last weekend's storm snow buried a weak surface hoar layer. Cold temperatures appear to have decrease slab properties above the SH layer. This layer should not be discounted; take the time to investigate the snowpack before committing to your line.

  • Dig down to find and test weak layers before committing to a line.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2