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Archived

Avalanche Forecast

Jan 23rd, 2017–Jan 24th, 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
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
1: Low
The avalanche danger rating at treeline will be low
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

Weather Forecast

Today mainly cloudy, no precipitation, an alpine high of -8 deg, freezing level to 900m and light winds. No significant precipitation for the for seeable future. A High pressure is building which will block aleutian storm systems to the north coast.

Snowpack Summary

Storm snow is settling and bonding to the mid january interface. Previous cool night time temps have aided in extracting slab properties out of the new snow, leaving it right side up. Storm snow stability tests produced mod-hard results with resistant to broken characteristics. Dec 18th interface is buried 1m and unreactive to stability tests.

Avalanche Summary

5 new avalanches observed in the highway corridor to size 2.5 on solar aspects yesterday. No NEW avalanches reported from the back country. Large destructive avalanches ran full path last week in the Highway corridor up to size 3.5, and reports from the back country observed natural slab avalanches to size 2.5 during the storm.

Confidence

Avalanche Problems

Persistent Slabs

Persistent slabs are most volatile near ridge crest, shallow areas and lee features. Down flow winds in the Sir Don Range have been observed. This layer overlies a variety of interfaces from surface facets to wind slabs.
Be careful with wind loaded pockets, especially near ridge crests and roll-overs.Choose well supported terrain without convexities.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3