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
03/06/2020 - 15:00
Snowpack Observation 		Powderhouse
Luther Pass Area (including Job and Freel) 		Educator
Lake Tahoe Community College - Wilderness Educati
03/17/2016 - 10:02
Avalanche Observation 		above Donner Pass Road
Donner Summit Area
Educator
Donner Summit Avalanche Semina
12/19/2020 - 13:15
Snowpack Observation 		Andesite peak
Donner Summit Area 		Dec 11 Facets, some appeared to start rounding at this location Students showcasing the current drastic difference between boot and ski pen Educator
Tahoe Mountain Scho
02/11/2023 - 15:26
Snowpack Observation 		Andesite Ridge
Donner Summit Area 		Pit wall showing a layer of graupel (2/5) from 37 to 38 cm down. Graupel 3 mm to 5 mm. Graupel 3 mm to 5 mm. Graupel 3 mm to 5 mm. CTM (14) SP Educator
Blackbird Mountain Guid
01/09/2022 - 10:31
Snowpack Observation 		Tamarack/fireplug
Mount Rose Area 		Signs of wind transport Reverse tracks and abrupt changes in snow conditions from shaded to solar areas Firm refrozen surfaces on steep East aspect Educator
Blackbird Mountain Guid
11/09/2022 - 11:23
Avalanche Observation 		Relay Peak Ridgeline
Mount Rose Area 		Cornice failure Crown view with debris Cornice failure Educator
Alpenglow Expeditio
12/25/2020 - 13:15
Snowpack Observation 		Cabin Creek
Cabin Creek, Deep Creek, or Pole Creek Area 		Educator
West Wind Collecti
02/09/2016 - 11:00
Snowpack Observation 		W ridge Castle Pk
Donner Summit Area 		Educator
Donner Summit Avalanche Semina
01/16/2016 - 12:00
Snowpack Observation 		Below Becker Ridge
Echo Summit Area 		Rain runnelsImpressive snow shedding off treesGraupelSignificant amounts of graupel Educator
Lake Tahoe Community College - Wilderness Educati
02/02/2021 - 13:30
Snowpack Observation 		Powderhouse
Luther Pass Area (including Job and Freel) 		Educator
Lake Tahoe Community College - Wilderness Educati
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
01/12/2021 - 11:00
Snowpack Observation 		Castle Peak
Donner Summit Area 		Rounding Dec 11 Facets Educator
West Wind Collecti
01/06/2019 - 12:30
Snowpack Observation 		Tamarack Peak
Mount Rose Area 		One of many easily triggered windslabs today Shooting cracks were common today Educator
Tahoe Mountain Scho
02/08/2020 - 13:00
Snowpack Observation 		Castle Peak
Donner Summit Area 		Snowpack structure on a E aspect @ 7700 ft Educator
Tahoe Mountain Scho
01/17/2020 - 14:45
Snowpack Observation 		Johnson Canyon
Donner Summit Area 		Educator
Tahoe Mountain Scho

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