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
12/20/2019 - 03:15
Snowpack Observation 		Wild flower Ridge
Donner Summit Area 		Educator
Alpine Skills International (AS
03/24/2019 - 08:00
Snowpack Observation 		Castle Pass
Donner Summit Area 		Surface Hoar near Castle Pass Looking down to the south from the shoulder of Castle Peak. Educator
Lake Tahoe Community College - Wilderness Educati
01/15/2021 - 10:45
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Educator
Outdoor Adventure Cl
03/08/2016 - 10:50
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Educator
Donner Summit Avalanche Semina
01/08/2023 - 14:00
Snowpack Observation 		Silver Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		wind effect in near treeline terrain east of Silver Peak Educator
Alpenglow Expeditio
02/02/2021 - 13:30
Snowpack Observation 		Powderhouse
Luther Pass Area (including Job and Freel) 		Educator
Lake Tahoe Community College - Wilderness Educati
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
03/13/2016 - 14:00
Snowpack Observation 		Incline Peak
Mount Rose Area 		Educator
Sierra Nevada Colle
03/07/2021 - 09:30
Avalanche Observation 		Shirley Canyon
Cabin Creek, Deep Creek, or Pole Creek Area 		Terrain where surface instability occurred Close Up of surface instability Another close up of surface instability Educator
Alpenglow Expeditio
01/15/2020 - 15:30
Snowpack Observation 		Powder house Meadow
Luther Pass Area (including Job and Freel) 		Educator
Lake Tahoe Community College - Wilderness Educati
01/05/2022 - 22:31
Snowpack Observation 		Castle/Andesite Peak
Donner Summit Area 		Educator
Alpenglow Expeditio
11/09/2022 - 11:23
Avalanche Observation 		Relay Peak Ridgeline
Mount Rose Area 		Cornice failure Crown view with debris Cornice failure Educator
Alpenglow Expeditio
12/02/2017 - 13:00
Snowpack Observation 		Andesite Ridge
Donner Summit Area 		Educator
Tahoe Mountain Scho
01/17/2016 - 13:30
Snowpack Observation 		NW of Snowshed Wall
Donner Summit Area 		Educator
Tahoe Mountain Scho
03/12/2017 - 10:05
Snowpack Observation 		Donner Ridge
Donner Summit Area 		Educator
Donner Summit Avalanche Semina

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