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Ski cut triggered slide at Crater Lake.

Location Name: Crater Lake Region: Carson Pass Area Observation Date & Time: Saturday, March 23, 2019 - 15:30
Location: 38.718049, -119.980092 See map: CalTopo	Is this an Avalanche Observation?: Yes Conditions Alerts: Avalanche Activity Recent Loading Terrain Alerts: Slopes Steeper than 30 degrees

Observation made by: Public

Tabs

Observation

Description of Snow, Weather, and Avalanche Conditions:

There was more wind and less visibility than expected. Wind loading was expected therefore the slope was ski cut along a convexity. The slab released after most of the ski coat was complete. After documenting the crown, we slid to the debris and then followed a lower angle route down.

Reference of crown size and slide surface being old heat crusted layer.

Crown area. Approximately 30m wide

Slide ran about 50 m to the next concavity

Snowpack Details

Persistent Weak Layers:

Buried

Terrain Details

Terrain: elevations:

Near Treeline

Terrain: aspects:

Avalanche Details

Avalanche Type:

Wind Slab

Failure Plane/Weak Layer:

New/old snow interface

Trigger

Trigger:

Skier

Trigger Modifier:

Intentionally Triggered

Terrain

Aspect:

Northeast

Starting Elevation:

9400ft

Size

Destructive Size:

D1 Relatively harmless to people.

Relative Size:

R1 Very Small

Crown Height:

Less than 1 ft

Avalanche Width (Average width):

100ft.

Avalanche Length (Vertical Run):

180ft.

People Involved

Number of people caught:

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Ski cut triggered slide at Crater Lake.

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Ski cut triggered slide at Crater Lake.

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