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Archived

Avalanche Forecast

Nov 14th, 2017–Nov 15th, 2017
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
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
3: Considerable
The avalanche danger rating at treeline will be considerable
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Glacier.

Heads up as most groups are recreating in one drainage, watch for groups above and below you! Early season hazards are lurking below the snow surface, ski / ride cautiously.

Weather Forecast

Cloudy with sunny periods today and a dusting of new snow. Alpine high of -6 with a rising freezing level to 1400m. Winds will be moderate today gusting to strong from the south. Tomorrow we're expecting 15-20cm with increasing winds and mild temps.

Snowpack Summary

10cm overnight, 35cm now covering the Nov 9 interface, 30-40cm over the Halloween crust at tree line. The crust sits on 30-50cm of rounded grains and mixed forms which seems to be bonding well for the time being. No significant instabilities in the snowpack currently, except for a slowly building storm slab on the surface.

Avalanche Summary

Eleven slab avalanches were recorded yesterday in the Highway corridor, up to size 2.5. These slides started in very steep terrain, mostly dry and made it to the run out zone.

Confidence

Due to the number and quality of field observations

Avalanche Problems

Storm Slabs

35cm of storm snow now covers the Nov 9 interface. Warming temps and increasing south winds will promote the formation of a storm slab. Keep a keen eye out for changing conditions over the day.
Use caution in alpine and open treeline lees. Recent snowfall has created storm slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3