The last avalanche forecast for the 2023-2024 season will post on April 21st. Thank you to all who contributed to the avalanche center this season through observations, volunteer time, and/or financial contributions.

Natural wind slabs on wildflower/mt judah

Location Name: Judah Region: Donner Summit Area Observation Date & Time: Sunday, December 27, 2020 - 11:45
Location: 39.303984, -120.317501 See map: CalTopo	Is this an Avalanche Observation?: Yes Conditions Alerts: Avalanche Activity Persistent Problem Recent Loading Terrain Alerts: Terrain Matches the Advisory

Observation made by: Guide at Blackbird Mountain Guides

Tabs

Observation

Description of Snow, Weather, and Avalanche Conditions:

Failed during storm, covered with new snow.

Snowpit or crown profile photo or graph:

Terrain Details

Terrain: elevations:

Above Treeline

Near Treeline

Below Treeline

Terrain: aspects:

N

NE

E

Avalanche Details

Avalanche Type:

Wind Slab

Failure Plane/Weak Layer:

Storm Snow

Additional number of similar avalanches:

4

Trigger

Trigger:

Natural

Trigger Modifier:

Cornice Fall Triggered

Terrain

Start Zone Slope Angle:

45degrees

Aspect:

Northeast

Starting Elevation:

above-treeline

Size

Destructive Size:

D1 Relatively harmless to people.

Relative Size:

R1 Very Small

Crown Height:

Less than 1 ft

Avalanche Width (Average width):

15ft.

Avalanche Length (Vertical Run):

30ft.

People Involved

Number of people caught:

0

Number of partial burials:

0

Number of full burials:

0

Sponsors:

Heavenly Mountain Resort

Kirkwood Mountain Resort

Mt. Rose Ski Tahoe

CA OHMVR

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