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Archived

Avalanche Forecast

Nov 10th, 2017–Nov 11th, 2017
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
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
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

Regions: Glacier.

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

Weather Forecast

Snow amounts will tapper off today as the active low moves southward into Washington. Light flurries today with 1cm of accumulation, temps ranging from -1 to -8 and light winds from the southwest. Freezing levels up to 1400m. Small amounts of snow over the weekend (5cm) with Monday bringing the next delivering of snow (up to 30cm in the forecast).

Snowpack Summary

Up to 10cm of new snow in past 24hrs, with 25-40cm of snow overlying the Halloween crust at TreeLine. This crust sits on 50-70cm of rounds/mixed forms which cover the earlier October crusts. Snowpack is 80-110cm above 1900m. Variable windslab in the Alpine from strong northerly winds last week now covered by recent snowfall.

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 of field observations

Avalanche Problems

Loose Dry

Up to 10cm of new snow on Nov 9 fell onto 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.
Be cautious of sluffing in steep terrain.Sluffs will be easy to trigger in steep terrain that is sheltered from the wind

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2