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More Photos of Tallac Corkscrew Bowl 3/14 Avalanche

Location Name: Mount Tallac Region: Desolation Wilderness Area (including Emerald Bay) Observation Date & Time: Tuesday, March 14, 2023 - 18:04
Location: 38.914984, -120.100907 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 Recent Loading›Rain on Snow Recent Loading›Snowfall Rates of More Than 1 in/hr Terrain Alerts: Slopes Steeper than 30 degrees Obvious Slide Path Trigger Points Terrain Traps Terrain Matches the Advisory

Observation made by: Public

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Observation

Description of Snow, Weather, and Avalanche Conditions:

Went out on 3/24 to check out the March 14 full length Corkscrew Bowl slide. The upper wind slab crown line has been filled in from storms since the slide occured but the lower mid-slope crowns were evident as well as extensive debris field. Many destroyed trees in the path and transported to toe of the debris.

Crown around 8200-8500' on E-SE aspect where wet slide likely started after trigger from windslab avalanche in upper bowl.

Looking up slide path

Looking down lower 1000' of slide path

Lots of damaged trees

Avalanche Details

Avalanche Type:

Wind Slab

Failure Plane/Weak Layer:

Unknown

Trigger

Trigger:

Natural

Terrain

Start Zone Slope Angle:

34degrees

Aspect:

Northeast

Starting Elevation:

near-treeline

Size

Destructive Size:

D4 Could destroy a railway car, large truck, several buildings, or a substantial amount of forest.

Relative Size:

R4 Large

Crown Height:

3 ft

Avalanche Width (Average width):

600ft.

Avalanche Length (Vertical Run):

2400ft.

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