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
02/20/2013 - 09:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		, , Professional Observer
12/06/2017 - 14:30
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Heavily wind scoured E aspect near summit. No snow remaining for future NE wind transport.2mECTP result along top of old nsf layer. Forecaster
02/11/2017 - 13:30
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Near treeline terrain at 7900'. Extensive wind loading and transport.Small test slopes on wind loaded S-SW aspects did not show any cracking. Guide
Tahoe Mountain Scho
03/18/2018 - 12:45
Snowpack Observation 		Andesite Peak
Donner Summit Area 		RB4 near Andesite Peak Public
12/22/2019 - 13:15
Snowpack Observation 		Andesite peak
Donner Summit Area 		Small windslab on test slope Shooting cracks on test slope prior to the small slab releasing Educator
Tahoe Mountain Scho
12/09/2020 - 09:45
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Terrain trap in below treeline terrain with weak snow on the surface. More exposed upper elevation terrain that has been scoured. Forecaster
03/22/2018 - 11:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Shooting crack on an E - NE facing wind-loaded slope at 8100 ft. Rain runnels at 7500'. Large cornice drops did not cause wind slab failure. Heavy, wet, deep snow existed at 8200' on the top of Andesite. Forecaster
01/22/2018 - 11:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Small cracking on above a ENE wind-loaded slope near the summit of AndesiteSkier-triggered pinwheels at 8000 ft. Forecaster
01/07/2016 - 10:50
Avalanche Observation 		Andesite Peak
Donner Summit Area
Guide
Tahoe Mountain Scho
12/21/2014 - 12:30
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Professional Observer
01/15/2017 - 13:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Guide
Tahoe Mountain Scho
02/24/2018 - 16:15
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Shooting crack on an E facing wind loaded test slope @ 7900 ft. after a few hard stomps The same test slope after a few more stomps. The wind slab slid down the small test slope. Forecaster
02/09/2015 - 02:00
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Professional Observer
01/13/2016 - 10:30
Snowpack Observation 		Andesite Peak
Donner Summit Area 		Forecaster
01/20/2017 - 15:45
Avalanche Observation 		Andesite Peak
Donner Summit Area
D2 Wind slab avalanche triggered by a small cornice piece
Small avalanche triggered by a larger piece of cornice
Cracking in the storm snow on in below treeline terrain
 Forecaster

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