Please remember that these observations indicate what was going on in the snowpack at a single point in time and space. They may not represent conditions where you are or where you plan to be. They also come from a variety of sources. SAC cannot vouch for the quality or accuracy of any observations that come from the general public. Some of these may be professional quality observations; some may not. Please use observations listed on this page as part of your information gathering process, but as always don't make decisions based on a single piece of information. If you are looking for more information on how to understand the information on this page, all of the pit data graphs and stability tests are part of what is presented in a Level II avalanche class that follows the American Avalanche Association (AAA) or American Institute for Avalanche Research and Education (AIARE) curriculum guidelines. All of the coding and abbreviations for data presented follows the publication Snow, Weather, and Avalanches: Observational Guidelines for Avalanche Programs in the United States (SWAG) which is the standard for all professional avalanche programs in the US. An electronic copy is available here. Most of what you are looking for is in Chapter 2 and Appendix F part 1. We use a program called SnowPilot to create the snowpit graphs. It is available as an online tool or as a downloadable program at This website also has a quick video and user guide on how to use create snowpits. Please send us your observations using the buttons below.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
02/19/2019 - 13:30 Donner Summit Donner Summit Area Snowpack Observation Skier triggered shooting crack on a low angle W aspect Skier cracking on a low angle slope wind-loaded by NE winds and previously undercut by the skin track. Variable wind scoured surfaces with exposed rain crust in some areas. Large surface hoar that was laying flat on many sheltered N-NE-E aspects. Forecaster
04/12/2019 - 12:30 Donner Summit - Black Wall Snowpack Observation The melt/freeze crust started to become unsupportable on S-SE-E aspects below 7000 ft. by 12:30 The melt/freeze crust was still boot supportable as of noon on S-SE-E aspects. 1 to 2 inches of wet corn snow on top of a 6 inch thick melt/freeze crust on an E aspect at 10 am. About 16 inches of wet snow existed below the crust. Glide cracks on an E aspect. Forecaster
02/05/2019 - 15:00 Duane Bliss East Shore Area Snowpack Observation Professional Observer
12/09/2018 - 13:15 E of Boreal ski area Donner Summit Area Snowpack Observation Educator
Donner Summit Avalanche Seminars
12/20/2018 - 09:45 E side Rose Knob Peak Mount Rose Area Snowpack Observation Educator
Donner Summit Avalanche Seminars
03/21/2019 - 16:00 Eagle Lake Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Glide Crack in top of underlying granite slab Public
03/24/2019 - 13:00 East Lincoln Donner Summit Area Avalanche Observation




01/13/2019 - 13:30 East of Grouse Rock Blackwood Canyon or Ward Canyon Area Avalanche Observation Crown of a slide on north facing slope Public
12/09/2018 - 12:00 East Ridge Tamarack Peak Mount Rose Area Snowpack Observation Surface hoar failing on an artificially loaded PST. Crusts on windward slopes preventing wind transport of snow with moderate SW winds. Windward SE-S-SW aspects have limited snow in this area. Forecaster
02/23/2019 - 13:00 Ebbets pass Snowpack Observation Public
03/10/2019 - 19:00 Ebbetts Pass Proper Ebbetts Pass Area Avalanche Observation Public
04/02/2019 - 10:00 Echo Lake Echo Summit Area Snowpack Observation A fleeting dash of blue this morning, showing the new snow on the ground and trees. Ski triggered loose wet roller ball activity on a steeper slope. Looking up at the ski triggered loose wet activity. Examining the new snow. Excavated line below the surface was the most wet layer. Recent cohesive roof shedding. I skinned right by this on 3/28 and the snow was still on the roof. Professional Observer
04/13/2019 - 07:00 Echo Peak Echo Summit Area Snowpack Observation Large debris from previous wet slide Many previous wet slides Another previous wet slide Public
02/27/2019 - 12:30 Echo Peak Echo Summit Area Snowpack Observation Public
03/09/2019 - 10:30 Echo Peak Echo Summit Area Avalanche Observation Public


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