These observations document past conditions at a small and variable scale. They are not to be confused with an avalanche forecast. They come from a variety of sources. We can only vouch for the quality of those produced by the SAC forecasters and professional observers.
Date and time of observation or avalanche occurrence Location Media Observation made by
01/05/2016 - 12:00

Avalanche Observation
Andesite Ridge

Donner Summit Area
Forecaster
12/15/2015 - 12:55

Snowpack Observation
Andesite Ridge

Donner Summit Area
Forecaster
12/17/2017 - 12:07

Snowpack Observation
Andesite Ridge

Donner Summit Area
Surface Conditions mix of sustrugi and melt freeze crusts Educator

Tahoe Mountain Scho
01/04/2017 - 13:00

Avalanche Observation
Andesite Ridge

Donner Summit Area
Partially covered up avalanche debris.
Natural avalanche on NE-E aspect wrapping around rock feature.  125' wide x 200' long.
Wind slab avalanche with up to 3' crown.  Covered in by additional snow.
Forecaster
01/14/2012 - 10:30

Snowpack Observation
Andesite Ridge

Donner Summit Area
Forecaster
02/25/2023 - 12:30

Snowpack Observation
Andesite Ridge

Donner Summit Area
Public
11/20/2015 - 10:00

Snowpack Observation
Andesite Ridge

Donner Summit Area
Forecaster
01/04/2017 - 15:00

Avalanche Observation
Andesite Ridge

Donner Summit Area
Partially filled in crown and covered debris
Forecaster
04/20/2010 - 15:51

Avalanche Observation
Andesite Ridge

Donner Summit Area
Forecaster
02/29/2012 - 15:00

Avalanche Observation
Andesite Ridge

Donner Summit Area
Forecaster
03/01/2014 - 13:35

Snowpack Observation
Andesite Ridge

Donner Summit Area
Professional Observer
01/28/2014 - 11:45

Snowpack Observation
Andesite Ridge

Donner Summit Area
Forecaster
01/20/2018 - 14:00

Snowpack Observation
Andesite Ridge

Donner Summit Area
Guide

Tahoe Mountain Scho
03/06/2011 - 11:00

Avalanche Observation
Andesite Ridge

Donner Summit Area
Forecaster
01/25/2018 - 12:00

Snowpack Observation
Andesite Ridge

Donner Summit Area
Minor storm slab cracking on slightly upside down storm snow 6 in below surface.Pit dug at top of below treeline avalanche path producing all ECTN results.Maximum extent of cracking seen in near or above treeline wind slab features.Ski cutting on wind slab test slopes produced either very minor or no results. Forecaster

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