Avalanche Forecast

Issued: Jan 23rd, 2017 8:00AM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Persistent Slabs.

Parks Canada ross campbell, Parks Canada

Summary

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

Problems

Persistent Slabs

An icon showing 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

Valid until: Jan 24th, 2017 8:00AM