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.

Lots of north facing wet loose

Location Name: Donner and trestle Region: Donner Summit Area Observation Date & Time: Saturday, April 1, 2023 - 02:19
	Is this an Avalanche Observation?: No Conditions Alerts: Avalanche Activity Rapid or Prolonged Warming Rapid or Prolonged Warming›Rollerballs / Pinwheels Rapid or Prolonged Warming›Warm Temperatures Terrain Alerts: Slopes Steeper than 30 degrees Obvious Slide Path Trigger Points

Observation made by: Public

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Observation

Description of Snow, Weather, and Avalanche Conditions:

Lots of large pinwheels and rollerballs were observed below 8000 ft. Later in the day, wet loose activity was widespread with ski cuts on any steep terrain. Large pinwheels up to 2 ft+ in diameter were observed. Air temps did not seem very warm but the snow surface was rapidly wetting especially at lower elevations

Terrain Details

Terrain: elevations:

Near Treeline

Below Treeline

Terrain: aspects:

Avalanche Details

Avalanche Type:

Wet Loose

Failure Plane/Weak Layer:

New/old snow interface

Additional number of similar avalanches:

Trigger

Trigger:

Snowboarder

Terrain

Aspect:

North

Northeast

Starting Elevation:

near-treeline

Size

Destructive Size:

D1 Relatively harmless to people.

Relative Size:

R1 Very Small

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Lots of north facing wet loose

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Forecast Tutorials

Observations

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Remote Weather Stations

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Local Resources

The SAC Daily Flow

Forecast Tutorials

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Lots of north facing wet loose

Conditions Alerts:

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