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
03/07/2020 - 11:30
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Trace of new snow at the trailhead at 10 am. Thin layer of new snow on very supportable refrozen old snow surface. No new drifting prior to 11 am in traditionally wind loaded areas near the ridgetop. Forecaster
03/13/2017 - 10:10
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Educator
Donner Summit Avalanche Semina
01/03/2016 - 13:00
Avalanche Observation 		Andesite Peak
Donner Summit Area 		Guide
Tahoe Mountain Scho
02/21/2021 - 12:08
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Public
01/19/2016 - 12:30
Avalanche Observation 		Andesite Peak
Donner Summit Area
Forecaster
12/14/2016 - 11:30
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Rain runnels existed up to Peak level (8200'). Forecaster
04/10/2022 - 10:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Ridges and sunny aspects melted out limiting terrain options. By mid morning cloud cover started to decrease with more solar radiation. Treed areas littered with down trees, branches, pine needles, etc. Trailhead melting out near the gate. Forecaster
04/01/2014 - 16:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Forecaster
03/24/2020 - 11:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Developing and fragile new cornices. Cracking in wind loaded areas with 4-8'' wind slabs. Forecaster
12/22/2018 - 15:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Educator
Tahoe Mountain Scho
02/15/2021 - 09:30
Avalanche Observation 		Andesite Peak
Donner Summit Area 		Small wind slab avalanche on test slope Crust with weaker snow just below it Cracking around skis Public
01/14/2022 - 13:12
Snowpack Observation 		Andesite peak 7500'
Donner Summit Area 		Guide
Blackbird Mountain Guid
12/14/2017 - 11:00
Snowpack Observation 		Andesite Peak and S aspect of Castle Pk
Donner Summit Area 		Forecaster
12/11/2016 - 14:00
Snowpack Observation 		Andesite Peak NW Shoulder
Donner Summit Area 		Guide
Tahoe Mountain Scho
03/10/2011 - 21:50
Snowpack Observation 		Andesite Pk
Donner Summit Area 		Board of Directors

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