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

Avalanche Forecast

Dec 12th, 2013–Dec 13th, 2013
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
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: Little Yoho.

5-15 cm has fallen in the last few days and has created touchy wind slabs on NE features. LP

Weather Forecast

Continued light flurries, warm alpine temperatures (-6C), and light to moderate west winds with strong gusts expected for the next 2 days.  We may see more intensive flurries on Sunday adding to the existing storm and wind slabs and in turn increase the avalanche hazard.

Snowpack Summary

There is 50-70 cm of snow at tree line which is generally weak, and facetted, but there is some mid-pack support. Some fresh wind and storm slabs exist in lee alpine terrain which may be reactive to skier triggering. The October crust is 10-20 cm from ground and producing mod-hard results with comp. test.

Avalanche Summary

No new natural avalanche activity observed in the last several days. Sunshine forecasters reported ski cutting a size 1.5 avalanche in previously worked terrain. It was a 10-15 cm thick storm slab over a wind slab, which stepped down to the basal rain crust or facets. It was on a lee NE facing alpine feature.

Confidence

Track of incoming weather systems is uncertain

Avalanche Problems

Wind Slabs

This layer is a concern in isolated areas loaded by wind.  These slabs sit on a weak facetted base. There has been no recent natural avalanches on this layer, but it still may be triggered by skiers or climbers.

  • Be careful with wind loaded pockets while approaching and climbing ice routes.
  • Be cautious as you transition into wind affected terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2

Storm Slabs

Thin (10-15 cm thick) touchy,low density, storm slabs have been reported in the region on lee features.

  • The new snow will require several days to settle and stabilize.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2