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Archived

Avalanche Forecast

Jan 22nd, 2016–Jan 23rd, 2016
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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: Little Yoho.

Rein it in this weekend...Thurs-Fri storm left touchy wind slabs on lee features.

AVALANCHE CONTROL planned for Mt. Bosworth, Stephen and Dennis on Saturday. Please no recreational activities

Weather Forecast

Over Friday night temperatures and winds will drop and snow/rain will taper off. Over the weekend, expect cloudy skies, light to moderate ridge wind, and alpine highs in the single digits. No significant flurries for the next several days.

Snowpack Summary

Ongoing storm Friday night is continuing to move the 20-30cm recent snow, forming wind slabs at treeline and above. The moist storm snow and wind slabs overlie weak facets. Below treeline snow was still unaffected by wind on Thursday-Friday, but this could change quickly with Friday nights weather. On Friday there was light rain to 1800 m.

Avalanche Summary

Poor visibility today, but we expect a small cycle to be occurring.  Avalanche control on Mt. Bourgeau on Thursday produced numerous avalanches size 1- 2 , one of which started as a wind slab and entrained all of the facets in the track, hitting the road. This is consistent with other observations this week from thin snowpack areas.

Confidence

Avalanche Problems

Wind Slabs

Windslabs will continue to build Friday night. Natural avalanche activity will taper on Saturday but the windslabs will remain touchy to human triggering.

  • Avoid lee and cross-loaded terrain near ridge crests.

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

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2

Loose Dry

With forecasted weather, natural loose snow avalanches may subside, but expect it still to be a problem in steep terrain for skiers/climbers. Touchy cornices developed through the storm are new trigger to consider when assessing overhead terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2