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Storm Slab Avalanche on Talking Mountain Descent

Location Name: Talking Mountain Region: Echo Summit Area Observation Date & Time: Saturday, February 13, 2021 - 15:30
Location: 38.834279, -120.063959 See map: CalTopo	Is this an Avalanche Observation?: Yes Conditions Alerts: Avalanche Activity Recent Loading Recent Loading›More Than a Foot of New Snow Terrain Alerts: Slopes Steeper than 30 degrees Trigger Points

Observation made by: Public

Tabs

Observation

Description of Snow, Weather, and Avalanche Conditions:

Snowboarder triggered the avalanche. Area of the trigger had rock surfaces below and there was a slight convex rollover.

We performed an ECT test adjacent to the to avalanche site and found relatively stable snow with no propagation, suggesting the avalanche was most likely triggered by poor adhesion of storm slab to the rock surface.

Crown of Avalanche ~1.5 ft in depth

Runout

Snowpack, Avalanche, Weather Videos:

Talking Mountain Feb 13, 2021, ECT Test Adjacent to Avalanche

Avalanche Details

Trigger

Trigger:

Snowboarder

Trigger Modifier:

Accidentally Triggered

Terrain

Start Zone Slope Angle:

35degrees

Size

Destructive Size:

D2 Could bury, injure, or kill a person.

Relative Size:

R2 Small

Crown Height:

2 ft

Avalanche Width (Average width):

30ft.

Avalanche Length (Vertical Run):

200ft.

People Involved

Number of people caught:

Number of partial burials:

Number of full burials:

Weather Details

Sky Cover:

Scattered - Partly Cloudy - 3/8 to 4/8 covered

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Storm Slab Avalanche on Talking Mountain Descent

Conditions Alerts:

Tabs

Talking Mountain Feb 13, 2021, ECT Test Adjacent to Avalanche

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Forecast Links

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Forecast Tutorials

Observations

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Submit Observations

Subscriptions

Remote Weather Stations

National Weather Service

Model Forecasts

Local Resources

The SAC Daily Flow

Forecast Tutorials

Other Resources

Storm Slab Avalanche on Talking Mountain Descent

Conditions Alerts:

Tabs

Talking Mountain Feb 13, 2021, ECT Test Adjacent to Avalanche

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