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
03/13/2016 - 12:30
Snowpack Observation 		Silver Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		Forecaster
01/10/2011 - 16:00
Snowpack Observation 		Negro Canyon
Donner Summit Area 		Forecaster
11/09/2017 - 12:00
Snowpack Observation 		Castle Peak
Donner Summit Area 		Cornice sections above test slopes easily collapsed with intentional efforts. No signs of wind slab instability revealed on the test slope below.Supportable snow cover at ~7,900' between the Grub Hut and Castle Pass. Forecaster
12/13/2022 - 12:30
Snowpack Observation 		Tamarack Peak
Mount Rose Area 		Forecaster
12/27/2013 - 14:30
Snowpack Observation 		Silver Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		Forecaster
04/17/2020 - 10:30
Snowpack Observation 		Jakes Peak
West Shore Area 		Boot top deep wet snow at 8500 ft. at 10:30 am. Patchy snow coverage below 7200 ft. Overview of the east side of Jakes above 7200 ft. Forecaster
03/12/2019 - 12:00
Snowpack Observation 		Mt. Judah
Donner Summit Area 		ECTP 17 on a small wind-loaded test slope. ECTP 19 on a small wind-loaded test slope. Small skier triggered cracking in a newly formed surface wind slab. Variable sun crust on a westerly aspect. Wind-affected snow surfaces. Blowing snow along the summit ridgeline of Mt. Judah Firm icy surface on a wind scoured W aspect. Large cornices overhanging Wildflower Ridge. I decided to go back and around them on the uphill side and stayed very far from the edge of the ridge when I did. Weather moving in from the West to the East. Forecaster
01/02/2017 - 10:45
Snowpack Observation 		Castle Peak
Donner Summit Area 		One of many wind loaded/wind slab test slopes that avalanched with minimal human triggering. Forecaster
01/27/2022 - 10:45
Snowpack Observation 		Deep Creek
Cabin Creek, Deep Creek, or Pole Creek Area 		Large surface hoar existed in a few spots near the creek. It was not as big away from the creek and it will likely go through several cycles of destruction and regrowth before any new snow accumulates. ECTX on a N facing slope @ ~7800 ft. An old crack in the snowpack likely from early January. An old crack in the snowpack. This slope likely cracked in early January. The thin rain crust near the surface at 7800 ft. A thicker crust on the surface at a lower elevation. Forecaster
12/09/2014 - 11:00
Snowpack Observation 		Poison Peak
Bear Valley Area 		Forecaster
12/15/2016 - 12:30
Snowpack Observation 		Relay Peak
Mount Rose Area 		55 gallon size cornice chunks Forecaster
01/06/2022 - 15:00
Snowpack Observation 		Johnson Canyon
Donner Summit Area 		Rain crust shining in the sun. Previous cornice collapse. ECTX on a wind-loaded test slope. Surface hoar on top of the rain crust on a N aspect near the top of Johnson Canyon. Forecaster
03/15/2013 - 12:30
Snowpack Observation 		Becker Peak
Echo Summit Area 		Forecaster
04/03/2023 - 14:03
Snowpack Observation 		Rubicon Peak
West Shore Area 		Ski kicks triggered shooting cracks on wind-loaded slopes in near treeline terrain. Ski kicks triggered shooting cracks on wind-loaded slopes in near treeline terrain. Blowing snow near the summit of Rubicon Clouds, snow and wind stuck around all day. Bursts of snow produced graupel throughout the day. About 3 inches of snow on top of a crust near the trailhead. Forecaster
11/28/2018 - 12:00
Snowpack Observation 		NW Castle Peak
Donner Summit Area 		Light wind loading occurring off of summit ridge with cornice development. Wind loaded pillows showed minor cracking. Forecaster

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