skier triggered avalanchesoutheast Mt.Judah

Location Name: Mt. Judah Region: Donner Summit Area Observation Date & Time: Friday, February 8, 2019 - 11:00
Location: 39.298642, -120.315431 See map: CalTopo	Is this an Avalanche Observation?: Yes Conditions Alerts: Avalanche Activity Recent Loading Recent Loading›Blowing Snow Recent Loading›More Than a Foot of New Snow Terrain Alerts: Slopes Steeper than 30 degrees Obvious Slide Path Terrain Matches the Advisory

Observation made by: Public

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Observation

Description of Snow, Weather, and Avalanche Conditions:

Skier triggered avalanche propagated 40 ft uphill and 100 ft wide on east face of south judah peak. Very lucky no injuries other than 1 skipole loss. Users complacent as to moderate/low danger. Never 0.

Avalanche Details

Avalanche Type:

Wind Slab

Failure Plane/Weak Layer:

New/old snow interface

Trigger

Trigger:

Skier

Trigger Modifier:

Accidentally Triggered

Terrain

Start Zone Slope Angle:

35degrees

Aspect:

East

Starting Elevation:

near-treeline

Size

Destructive Size:

D2 Could bury, injure, or kill a person.

Relative Size:

R4 Large

Avalanche Width (Average width):

100ft.

Avalanche Length (Vertical Run):

700ft.

People Involved

Number of people caught:

Number of partial burials:

Number of full burials:

Weather Details

Elevation of Observation:

7000 - 8000 ft.

Blowing Snow:

Light

Wind Direction:

South

Wind Speed:

Moderate

Sky Cover:

Overcast - Cloudy - 8/8 covered

Precipitation:

None

Air temperature:

Below Freezing

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skier triggered avalanchesoutheast Mt.Judah

Conditions Alerts:

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skier triggered avalanchesoutheast Mt.Judah

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