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Avalanches on Incline Lake Peak

Location Name: Incline Lake Peak Region: Mount Rose Area Observation Date & Time: Saturday, February 13, 2021 - 10:00
Location: 39.296100, -119.935000 See map: CalTopo	Is this an Avalanche Observation?: Yes Conditions Alerts: Avalanche Activity Other Signs of Instability (cracking, whumpfing, collapsing) Recent Loading Terrain Alerts: Slopes Steeper than 30 degrees Obvious Slide Path Trigger Points Terrain Traps Terrain Matches the Advisory

Observation made by: Forecaster

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Observation

Description of Snow, Weather, and Avalanche Conditions:

These avalanches likey occured on Saturday Feb. 13 and were likely triggered by skiers or snowboarders. They both failed on softer (fist hard) decomposing storm snow with a bit of graupel near the base of the storm snow. The slab was 4-finger to 4-finger + in hardness. They both failed on steep (38-40 degree) E facing slopes. They are similar to another small skier triggered avalanche reported on Saturday (original report here) and to one on Sunday (observation here).

Human-triggered avalanches on a steep (38-40+ degree) E facing slope

Looking up from the debris

Human-triggered avalanches on a steep (38-40+ degree) E facing slope

Another avalanche on a nearby steep E-ENE facing slope

Looking down into the debris

The crown of tha avalanche

Terrain Details

Terrain: elevations:

Near Treeline

Terrain: aspects:

Avalanche Details

Avalanche Type:

Storm Slab

Failure Plane/Weak Layer:

Storm Snow

Additional number of similar avalanches:

Trigger

Trigger:

Skier

Terrain

Start Zone Slope Angle:

39degrees

Aspect:

East

Starting Elevation:

near-treeline

Size

Destructive Size:

D2 Could bury, injure, or kill a person.

Relative Size:

R2 Small

Crown Height:

1 ft

Avalanche Width (Average width):

40ft.

Avalanche Length (Vertical Run):

70ft.

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Avalanches on Incline Lake Peak

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Avalanches on Incline Lake Peak

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