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Archived

Avalanche Forecast

Nov 11th, 2017–Nov 12th, 2017
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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: Glacier.

Early season hazards are lurking below below the snow surface, ski and ride cautiously and defensively once below treeline.Watch for sluff accumulation in steep terrain.

Weather Forecast

No snow in todays forecast with mainly cloudy skies, an alpine high of -7, light winds from the south and a freezing level that could reach up to 1300m. 5cm of snow forecasted for Sunday and 30cm by Monday will be accompanied by strong southerly winds with temps remaining below zero.

Snowpack Summary

A light dusting of snow overnight, with 25-40cm overlying the Halloween crust at treeline. The crust sits on 50-70cm of rounds/mixed forms which cover the earlier October crusts. Snowpack is 80-110cm above 1900m. Variable windslab (unreactive to riders) in the alpine from strong northerly winds last week now covered by recent snowfall (10-15cm).

Avalanche Summary

Several days ago two natural wind slab avalanches were observed in the HWY corridor off Mt Macdonald on steep terrain to size 1.5. No other natural or rider triggered avalanches have been reported recently.

Confidence

Due to the number and quality of field observations

Avalanche Problems

Loose Dry

10-15cm of snow on the Nov 9 surface hoar, reported up to 20mm at TL. Not expecting this to be an issue until it sees more load but felt it is worth noting, manage your sluff in steep terrain.
Sluffs will be easy to trigger in steep terrain that is sheltered from the windBe cautious of sluffing in steep terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2