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Small sluff avalanche on Andesite Peak

Location Name: Andesite Peak Region: Donner Summit Area Observation Date & Time: Sunday, March 7, 2021 - 13:58
Location: 39.351404, -120.366546 See map: CalTopo	Is this an Avalanche Observation?: Yes Conditions Alerts: Avalanche Activity Terrain Alerts: Slopes Steeper than 30 degrees

Observation made by: Public

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Observation

Description of Snow, Weather, and Avalanche Conditions:

Skinning up the Andesite ridge in the later afternoon around 2pm, noticed a small sluff type avalance on the north facing aspect of the peak, just below the summit, that appeared to be unintentionally triggered by a skier (originated just below a series of kick turn marks). Was very small, maybe 20ft in width and 40ft in run, looked to involve less than 1 inch of surface snow.

Terrain Details

Terrain: elevations:

Above Treeline

Terrain: aspects:

Avalanche Details

Trigger

Trigger:

Unknown

Terrain

Start Zone Slope Angle:

31degrees

Aspect:

North

Starting Elevation:

above-treeline

Size

Destructive Size:

D1 Relatively harmless to people.

Relative Size:

R1 Very Small

Avalanche Width (Average width):

20ft.

Avalanche Length (Vertical Run):

40ft.

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Small sluff avalanche on Andesite Peak

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Small sluff avalanche on Andesite Peak

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