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Observations

Region: Turnagain, scottfennell
Location: PMS Bowl
Observer:
Date:

Route & General Observations

Toured up the west ridge of Magnum to PMS bowl.

Avalanche Details

Avalanche details

Trigger NaturalAvalanche Type Aspect Unknown
ElevationunknownSlope AngleunknownCrown Depthunknown
WidthunknownLengthunknown  

Observer Comments

Superbowl/Corner Pocket avalanche was seen from afar. It looks like it ran during the 12/18-19 storm. D3 size slide. The crown wrapped around the basin. We suspect the early December NSF or BSH was the weak layer due to the contiguous nature of the crown.

There was also a recent D1 on the Sunburst S face that looked to be cornice triggered (possibly from skiers/riders/dogs on the ridge).

The wind loading patterns on the S face of Sunburst showed top loading (cornices) and cross loading (pillowed and sculpted snow). There was a number of old wind slabs from the storm that were lower in the paths and looked to be from the cross loading.

We also observed a small (D1) wind slab in one of the N chutes on Magnum that looked like it was also from the storm. The crown was off the ridge lower into the track.

Red Flags

Obvious signs of instability

Recent Avalanches?YesCollapsing (Whumphing)?NoCracking (Shooting cracks)?No

Observer Comments

See avalanche details
No collapsing or cracking
Skier triggered sluffing observed on the steep west facing terrain of Magnum.
Cornice triggered D1 on Sunburst S face.

Weather

Weather

Broken skies with some beautiful solstice sun
Temps in the teens
Very light wind

Snow Characteristics

Snow surface

6-10 inches of Near Surface Facets with Surface Hoar to ridge tops.
Stiff wind effected snow on the ridge.

Snowpack

No formal tests

Photos & Video

Photos



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