Avalanche on Incline Peak

Location Name: Incline Peak NE Bowl Region: Mount Rose Area Observation Date & Time: Sunday, March 18, 2018 - 13:30
Location: 39.296646, -119.934397 See map: CalTopo	Is this an Avalanche Observation?: Yes Conditions Alerts: Avalanche Activity Rapid or Prolonged Warming Rapid or Prolonged Warming›Strong Sunshine Recent Loading Recent Loading›Blowing Snow Recent Loading›More Than a Foot of New Snow Terrain Alerts: Slopes Steeper than 30 degrees Trigger Points

Observation made by: Public

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Observation

Description of Snow, Weather, and Avalanche Conditions:

Snowboarder triggered avalanche on a wind loaded 40 degree convexity. 12” crown line crossed the slope. The debris ran and collected in trees. Avalanche appears to have occurred Saturday afternoon.

Mid slope looking at the crown line and bed surface

View down to debris pile

Extent of debris field up to crown

Warming near rock

Additional crown line in the bowl

Cornice collapse at summit

Avalanche Details

Avalanche Type:

Wind Slab

Failure Plane/Weak Layer:

Storm Snow

Additional number of similar avalanches:

Trigger

Trigger:

Snowboarder

Trigger Modifier:

Accidentally Triggered

Terrain

Start Zone Slope Angle:

40degrees

Aspect:

Northeast

Starting Elevation:

below-treeline

Size

Destructive Size:

D2 Could bury, injure, or kill a person.

Relative Size:

R2 Small

Crown Height:

1 ft

Avalanche Width (Average width):

70ft.

Avalanche Length (Vertical Run):

150ft.

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Avalanche on Incline Peak

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Avalanche on Incline Peak

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