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Archived

Avalanche Forecast

Jan 2nd, 2017–Jan 3rd, 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
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
2: Moderate
The avalanche danger rating at treeline will be moderate
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
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.

Stay sharp as reverse loading has formed windslab in unusual places.  The sun may wake up steep solar surface layers.

Weather Forecast

Sunny with cloudy periods and no precipitation.  Alpine temperature -21C with ridge top winds E at 20km/h, brrr!  More arctic high pressure to mid week.  Stay warm and plan and early turn around time.

Snowpack Summary

Major features of the snowpack; 1. surface windslabs in alpine and exposed treeline locations from both strong S'ly winds Dec 30 and reverse loading from the arctic air invasion, 2. spotty Dec 26 surface hoar layer found in protected locations, 3. Dec 18th facet/surface hoar interface down 80cm in the snowpack. Avoid unsupported terrain features.

Avalanche Summary

No new avalanche activity observed in the highway corridor. 

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Christmas holiday storm snow has been redistributed first by strong S'ly winds last week now by N-E mod-strong winds. Watch for reverse loading on exposed terrain in the alpine and at treeline. Look for the Dec 18th layer and stay off convexities.
Watch for whumpfing, hollow sounds, and shooting cracks.Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3