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
01/06/2018 - 12:30

Snowpack Observation
Andesite Ridge

Donner Summit Area
Breakable Crust on Andesite RidgeCastle Peak with lift clouds around 12 30 Educator

Tahoe Mountain Scho
02/10/2016 - 11:01

Snowpack Observation
Top Negro Canyon; W of Donner Ridge

Donner Summit Area
Educator

Donner Summit Avalanche Semina
01/15/2021 - 10:45

Snowpack Observation
Andesite Peak

Donner Summit Area
Educator

Outdoor Adventure Cl
02/18/2016 - 08:45

Snowpack Observation
W end Boreal Ridge above Central Sierra Snow Lab

Donner Summit Area
, Educator

Donner Summit Avalanche Semina
01/23/2021 - 14:00

Snowpack Observation
Andesite Peak

Donner Summit Area
Small shooting cracks and wind slab failure on SE-S aspects from NE winds Small wind pillows forming on SE-S aspects off of ridgeline from strong NE winds Educator

Tahoe Mountain Scho
03/12/2017 - 10:05

Snowpack Observation
Donner Ridge

Donner Summit Area
Educator

Donner Summit Avalanche Semina
01/24/2018 - 11:00

Avalanche Observation
Lower Andesite Ridge

Donner Summit Area
Educator

Tahoe Mountain Scho
03/04/2016 - 09:30

Snowpack Observation
Donner Ridge

Donner Summit Area
Educator

Donner Summit Avalanche Semina
12/27/2019 - 13:15

Snowpack Observation
Andesite peak

Donner Summit Area
Cornice cut releasing small wind slab Visual of a compression test, Andesite Peak, 8100' East Aspect Educator

Tahoe Mountain Scho
03/08/2016 - 10:50

Snowpack Observation
Andesite Peak

Donner Summit Area
Educator

Donner Summit Avalanche Semina
12/30/2021 - 12:45

Snowpack Observation
Andesite Peak

Donner Summit Area
Small cornice on Andesite Ridge Cornice formation on Andesite Peak Educator

Tahoe Mountain Scho
12/10/2017 - 12:10

Snowpack Observation
Castle Pass

Donner Summit Area
Educator

Tahoe Mountain Scho
12/29/2020 - 14:00

Snowpack Observation
NE benches below Silver Peak

Cabin Creek, Deep Creek, or Pole Creek Area
Educator

Alpenglow Expeditio
01/07/2023 - 12:52

Snowpack Observation
Johnson Canyon

Donner Summit Area
Intense blowing snow over Sierra Crest in early afternoon CT showed no clean shears around the Jan 4 or Dec 31 RC.  E aspect, just below 7000'. Educator

Tahoe Mountain Scho
03/13/2016 - 14:00

Snowpack Observation
Incline Peak

Mount Rose Area
Educator

Sierra Nevada Colle

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